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REVIEW 4 major objections 6 minor 38 references

Designing artificial zinc phosphate tribofilms with tailored mechanical properties by altering the chain length

T0 review · 4 major / 6 minor · reviewed 2026-08-07 · deepseek-v4-flash

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Pith's one-line read Annealing magnetron-sputtered zinc phosphate in ambient air shortens its phosphate chains, and shorter chains are harder, stiffer, and more wear-resistant.

desk verdict A useful empirical demonstration undercut by an internally inconsistent chain-length interpretation; the paper needs independent speciation data before it can make its headline claim. read the letter →

arxiv 2506.13808 v1 pith:YSTLROB2 submitted 2025-06-13 cond-mat.mtrl-sci physics.app-ph

Sebastian Lellig , Subisha Balakumar , Peter Schweizer , Eva P. Mayer , Simon Evertz , Marcus Hans , Damian M. Holzapfel , Yin Du
show 4 more authors
Qing Zhou Martin Dienwiebel Johann Michler Jochen M. Schneider
This is my paper · ORCID
classification cond-mat.mtrl-sciphysics.app-ph
keywords zincphosphateglasstribofilmZDDPmagnetronsputteringchainlengthX-rayphotoelectronspectroscopynanoindentationwearresistance
verification ladder T0 review T1 audit T2 compute T3 formal

The pith

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The reading

This paper tries to establish that a sulfur-free zinc phosphate coating can reproduce the protective behavior of ZDDP-derived tribofilms without sulfur, and that annealing is a practical dial for its mechanical properties. The key claim is that annealing the sputtered coating in air between 100 and 400 °C progressively shortens the phosphate chains from metaphosphate to orthophosphate, driven by hydrolysis that removes phosphorus and oxygen. The authors report that shorter chains are harder and stiffer, with hardness rising from below 4 GPa to about 5.5 GPa and reduced Young's modulus from about 65 to 84 GPa, and that a 400 °C annealed sample wears 3.5 times less than the as-deposited one. If correct, this makes post-deposition annealing a design step for artificial, sulfur-free tribofilms with targeted wear protection.

What carries the argument

The central quantity is the bridging-to-non-bridging oxygen (BO/NBO) ratio from the O 1s XPS signal, used as a chain-length classifier: 0 for orthophosphate, 1/6 for pyrophosphate, between 1/6 and 0.5 for polyphosphate, 0.5 for metaphosphate, and above 0.5 for cross-linked ultraphosphate. The argument couples this ratio to composition shifts (P/Zn falls from 0.79 to 0.32 and O/Zn from 1.28 to 0.59 after 400 °C in air) and to hardness, reduced modulus, and wear volume, so annealing temperature is effectively converted into a mechanical property setting. The proposed mechanism is hydrolysis: atmospheric water diffuses into the coating, protonates bridging oxygens, releases phosphoric acid, and leaves excess zinc that further breaks chains as a glass modifier.

What would settle it

Run Raman or 31P magic-angle-spinning NMR on as-deposited and annealed films and compare the chain-length assignment with the XPS BO/NBO values; if the as-deposited film is not metaphosphate or the 400 °C film still shows long chains, the central claim fails. Weighing a film during humid annealing to detect water uptake would simultaneously test the hydrolysis mechanism.

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Extended reading notes

Core claim

The paper reports that magnetron-sputtered zinc phosphate films are X-ray amorphous metaphosphates with a bridging-to-non-bridging oxygen (BO/NBO) ratio near 0.5. Annealing in ambient air at increasing temperatures reduces that ratio toward 0, which the authors read as a transition through poly- and pyrophosphate to orthophosphate. Composition changes measured by XPS and by TEM-EDX line scans show a loss of P and O relative to Zn over the whole coating thickness, and annealing in nitrogen, vacuum, or oxygen produces only a small chain-length change, pointing to atmospheric water as the hydrolytic agent that breaks P-O-P bridges. The mechanical consequence is a monotonic link between shorter chains and higher hardness, higher reduced modulus, and higher wear resistance, which the paper frames as a tool to design artificial tribofilms with desired properties.

Load-bearing premise

The load-bearing premise is that the XPS O 1s bridging/non-bridging oxygen ratio correctly measures phosphate chain length in these films, which are off-stoichiometric (P/Zn = 0.79, O/P = 1.65) and are not independently confirmed by another structural probe.

Editorial extensions

If this is right

  • Annealing temperature can select phosphate chain length over the entire meta-to-ortho range, matching the chain-length range found in ZDDP tribofilms.
  • Coatings annealed to orthophosphate reach about 5.5 GPa hardness and 84 GPa reduced modulus, increases of about 79% and 29% over the as-deposited values.
  • Dry-sliding wear volume drops by about a factor of 3.5 after annealing at 400 °C, while steady-state friction in oil remains similar.
  • Because the composition change is bulk-wide rather than skin-deep, the mechanical property change applies to the whole coating, not just its surface.
  • A sulfur-free sputtering route followed by annealing can recreate the protective phosphate chemistry formed by ZDDP without introducing sulfur.

Reading between the lines

Editorial extensions of the paper, not claims the author makes directly.

  • A testable extension is cross-checking the BO/NBO proxy with Raman or 31P NMR on identically annealed films; disagreement would mean the property trends should be attributed to composition rather than chain length.
  • If the hydrolysis mechanism is right, exposing annealed orthophosphate films to humid air should show water uptake that precedes or accompanies P and O loss, which could be measured gravimetrically.
  • The same post-annealing strategy may generalize to other metal metaphosphate coatings, giving a broader sulfur-free route to engineered tribofilms.
  • Since friction changes little while wear resistance improves sharply, the practical payoff of this approach is durability rather than friction reduction, which may guide where such coatings are used.
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Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, and a circularity audit.

Referee Report

4 major / 6 minor

Summary. The manuscript reports magnetron-sputtered, sulfur-free zinc phosphate coatings annealed in ambient air at 100-400 °C. Using the XPS O 1s bridging-to-non-bridging oxygen (BO/NBO) ratio, the authors classify the as-deposited coating as metaphosphate and interpret the annealing series as a progressive chain-length reduction from metaphosphate through poly- and pyrophosphate to orthophosphate. TEM-EDX line scans are used to argue that the composition change extends through the whole coating thickness. Nanoindentation and reciprocating wear tests show that annealed samples are harder, stiffer, and more wear-resistant, and the authors propose a hydrolysis mechanism involving atmospheric water. The central claim is that post-deposition annealing is a design knob that tailors artificial zinc phosphate tribofilm properties by controlling phosphate chain length.

Significance. If the chain-length interpretation were established, the work would be a useful contribution to sulfur-free antiwear coating design, with a direct synthesis route and a systematic annealing protocol. The paper has concrete strengths: it uses a well-defined sputter target, reports a full annealing series, checks bulk composition with TEM-EDX, performs atmosphere-controlled annealing experiments, and compares hardness values with ZDDP tribofilm literature. However, the stress-test concern lands: the reported XPS compositions are internally inconsistent with the metaphosphate assignment, so the load-bearing structural proxy is not validated. The qualitative observation that annealing in humid air reduces P and O content and increases hardness, modulus, and wear resistance is plausible, but the central chain-length mechanism needs independent structural evidence before the main claim can be accepted.

major comments (4)
  1. [Results and Discussion, Chemical Analysis (Figs. 1, 2) and Proposed mechanism] The central chain-length assignment is internally inconsistent with the reported XPS compositions. The as-deposited composition of 30 at.% Zn, 23 at.% P, and 38 at.% O gives P/Zn = 0.77 and O/P = 1.65. For any (ZnO)_a(P2O5)_b phosphate glass, O/P = Zn/P + 2.5, so with Zn/P = 1.30 one expects O/P ≈ 3.8, not 1.65; a metaphosphate Zn(PO3)2 has Zn/P = 0.5 and O/P = 3. The samples annealed at 400 °C are even further from any phosphate stoichiometry (P/Zn = 0.32, O/Zn = 0.59 gives O/P ≈ 1.8, while the expected value is ≈ 5.6). Consequently, the O 1s BO/NBO decomposition cannot be taken as a quantitative measure of phosphate chain length unless non-phosphate oxygen contributions (ZnO, hydroxide, carbonate) or a systematic quantification error are ruled out. An independent structural probe (Raman, 31P NMR, or composition-based Q^n speciation) is required.
  2. [Figure 5 and 'Influence of chain length alteration on mechanical properties'] The hardness and reduced-modulus trends in Figure 5 are plotted against BO/NBO ratios measured on 1 μm coatings, while indentation was performed on ~2 μm coatings. The paper assumes that annealing-induced chain-length changes are independent of coating thickness, but this assumption is neither tested nor supported. If the 2 μm films exhibit a different composition response, the central property-versus-chain-length correlation would not be established. The authors should measure or report the BO/NBO ratio on the actual indented samples, or provide a quantitative justification for the thickness independence.
  3. [Results and Discussion, 'Influence of chain length alteration on mechanical properties' and 'Wear and friction behavior'] The manuscript attributes the increase in hardness, modulus, and wear resistance to reduced phosphate chain length, but the annealing treatment also changes composition (P/Zn, O/Zn), possibly density, residual stress, and crystallinity. No XRD or other structural data are shown for annealed samples, and no density or residual-stress measurements are reported. The large P and O loss observed at 400 °C produces a Zn-rich surface that may itself be harder and more wear-resistant regardless of phosphate chain length. The paper should either provide evidence isolating the chain-length effect or moderate the causal claim.
  4. [Wear and friction behavior, Figure 6] The wear-resistance claim rests on a single wear track for each condition (one as-deposited and one annealed sample). No repeat measurements, error bars, or statistical analysis are presented, so the reported factor-of-3.5 reduction in wear volume cannot be assessed for significance. At minimum, the authors should report multiple measurements and the scatter.
minor comments (6)
  1. [Table 1] The pyrophosphate chemical formula is written as Zn2P3O7; it should be Zn2P2O7.
  2. [Reference 18] The reference title contains 'P2O2' and should read 'P2O5'.
  3. [Section 2, XRD parameters] The accelerating voltage is reported as '40 V'; this should presumably be '40 kV'.
  4. [Introduction, paragraph on Canning] 'Canning et el.' should be 'Canning et al.'
  5. [Figure 2 caption] The caption states a 'linear decrease in chain length', but the linear region is only between 100 and 250 °C; the full dataset from room temperature to 400 °C is not linear.
  6. [Results and Discussion, mechanical properties] The sentence describing 'a decrease in reduced Young's modulus from 84 to 65 GPa for longer chain lengths' is worded in a confusing way relative to Figure 5, which shows that shorter chains have higher modulus; please rephrase.

Circularity Check

0 steps flagged · score 0.0 of 10

No significant circularity; the BO/NBO chain-length axis is an externally benchmarked XPS measurement and the mechanical data are independent.

full rationale

The paper's derivation chain is: (i) magnetron sputtering produces amorphous zinc phosphate coatings; (ii) XPS O 1s peak fitting yields a BO/NBO ratio; (iii) using externally published thresholds (Brow, Crobu, Heuberger), this ratio is converted into a phosphate chain-length classification; (iv) annealing changes composition and BO/NBO; and (v) nanoindentation and wear measurements are compared against that structural axis. No fitted parameter is used to force the property trend, and the chain-length classification criteria are not defined by the present authors or by the mechanical measurements. The hardness/modulus versus BO/NBO correlations therefore have independent content: the same BO/NBO-derived chain length is compared with separately measured mechanical properties, and the comparison to ZDDP tribofilm data from Ueda and Spikes is an external benchmark. The reader's concern that the as-deposited composition (Zn 30 at.%, P 23 at.%, O 38 at.%; P/Zn ~0.77, O/P ~1.65) is inconsistent with a metaphosphate is a measurement-validity question about the BO/NBO decomposition for this off-stoichiometric, possibly oxide/hydroxide-containing surface, not a circularity of the argument. Similarly, the proposed hydrolysis mechanism is a plausible interpretation supported by controlled atmosphere comparisons, not an input reused as a conclusion. There are no self-citations carrying the argument, no uniqueness theorems imported from the authors' prior work, and no prediction that reduces by construction to a fitted input. Thus the central claimed relationship, annealing temperature changes the XPS-derived chain length and this correlates with mechanical properties, is not circular, even though the quantitative validity of the chain-length axis warrants independent verification.

Assumptions & free parameters 0 free parameters · 6 assumptions · 0 invented entities

The central claims rest on six unproven premises, most importantly that the XPS BO/NBO ratio is a valid chain-length meter for these off-stoichiometric films and that hardness/wear changes are caused by chain length rather than other annealing effects. No numerical model parameters are fitted; the fixed inputs (1.6 eV BO-NBO separation, classification thresholds) come from cited literature. No new physical entities are introduced.

assumptions (6)
  • domain assumption The XPS O 1s BO/NBO ratio, decomposed with a fixed 1.6 eV separation, is a valid quantitative measure of phosphate chain length in these sputtered films.
    Used to classify the as-deposited film as metaphosphate and to read the meta-to-ortho transition in Figures 1 and 2; the measured composition (P/Zn 0.79, O/P 1.65) is inconsistent with metaphosphate, so the premise is not validated.
  • domain assumption The BO/NBO-to-chain-length thresholds (0, 1/6, 0.5 for ortho, pyro, meta) transfer from stoichiometric phosphate glass references to these non-stoichiometric coatings.
    Thresholds are taken from Heuberger et al. and Crobu et al.; the paper applies them to a Zn-rich, O-poor film without independent calibration.
  • domain assumption Surface composition changes measured by XPS represent the whole coating thickness for all annealing conditions.
    Only one as-deposited and one 400 °C annealed sample were examined by TEM-EDX line scans (Figure 3); this is extrapolated to all temperatures and used to connect surface XPS with bulk mechanical properties.
  • ad hoc to paper Annealing-induced chain-length changes are independent of coating thickness, so 1 micrometer XPS samples can be compared with 2 micrometer indentation samples.
    Stated explicitly in the mechanical properties section: 'Assuming that the annealing-induced changes in chain length are independent of coating thickness'. Not experimentally tested.
  • domain assumption Water from ambient air hydrolyzes the phosphate network, releasing P and O and shortening chains, and this mechanism is the dominant cause of the observed changes.
    Proposed mechanism in Figure 4, supported only by atmosphere-dependence (N2/vacuum/O2 show smaller changes) and literature; no direct measurement of evolved species or water content.
  • ad hoc to paper The mechanical and wear property differences are caused by the phosphate chain-length/composition change, not by concurrent annealing-induced density, crystallinity, residual stress, or oxidation changes.
    No post-annealing XRD, density, or stress measurements are reported; the only XRD is for the as-deposited sample (Figure S1), so the causal attribution is assumed.

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Cite this review

Pith. "Pith review of Designing artificial zinc phosphate tribofilms with tailored mechanical properties by altering the chain length." pith.science (2026). https://pith.science/paper/YSTLROB2

@misc{pith2026250613808,
  author       = {Pith},
  title        = {Pith review of: Designing artificial zinc phosphate tribofilms with tailored mechanical properties by altering the chain length},
  year         = {2026},
  howpublished = {\url{https://pith.science/paper/YSTLROB2}},
  note         = {Machine review of arXiv:2506.13808}
}
read the original abstract

Zinc dialkyldithiophosphate (ZDDP), as the most prominent lubrication additive, forms tribofilms consisting primarily of zinc phosphate glasses containing sulfides. As sulfur is linked to environmental concerns, sulfur-free zinc phosphate coatings have been sputtered from a Zn3(PO4)2 target and investigated here. Based on the bridging to non-bridging oxygen ratio, determined by X-ray photoelectron spectroscopy (XPS), the as deposited coatings are classified as metaphosphates. As the annealing temperature is increased, the chain lengths are reduced, as witnessed by XPS data indicated by a loss of phosphorus and oxygen of the coating surface, likely due to hydrolysis with water from the atmosphere. Transmission electron microscopy energy-dispersive X-ray spectroscopy line scans show that the XPS-revealed composition change of the coating surface upon annealing occurs over the whole thickness of the coating. This alteration in composition and chain length reductions causes a rise in hardness, reduced Young's modulus, and wear resistance. Therefore, the properties of the artificial zinc phosphate tribofilms can be tailored via a thermally stimulated composition change, causing an alternation in chain length from meta- to orthophosphate and thereby enabling the design of coatings with desired mechanical properties.

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Reference graph

Works this paper leans on

38 extracted references · 38 canonical work pages

  1. [1]

    Khalili, and S.R

    Awang, M., A.A. Khalili, and S.R. Pedapati, A review: Thin pr otective coating for wear protection in high-temperature application. Metals, 2019. 10(1): p. 42

    work page 2019

  2. [2]

    Tribology letters, 2004

    Spikes, H., The history and mechanisms of ZDDP. Tribology letters, 2004. 17(3): p. 469- 489

    work page 2004

  3. [3]

    Glovnea, and H

    Fujita, H., R. Glovnea, and H. Spikes, Study of zinc dialkydithiophosphate antiwear film formation and removal processes, part I: experimental. Tribology transactions, 2005. 48(4): p. 558-566

    work page 2005

  4. [4]

    Taylor, L. and H. Spikes, Friction-enhancing properties of ZDDP antiwear additive: part I—friction and morphology of ZDD P reaction films. Tribology transactions, 2003. 46(3): p. 303-309

    work page 2003

  5. [5]

    Tribology international, 2005

    Nicholls, M.A., et al., Review of the lubrication of metallic surfaces by zinc dialkyl - dithiophosphates. Tribology international, 2005. 38(1): p. 15-39

    work page 2005

  6. [6]

    Fujita, H. and H. Spikes, Study of zinc dialkyldithiophosphate antiwear film formation and removal processes, part II: kinetic model. Tribology transactions, 2005. 48(4): p. 567 - 575

    work page 2005

  7. [7]

    McDermott, and G.A

    Aktary, M., M.T. McDermott, and G.A. McAlpine, Morphology and nanomechanical properties of ZDDP antiwear films as a function of tribological contact time. Tribology letters, 2002. 12: p. 155-162

    work page 2002

  8. [8]

    Tribology Letters, 2019

    Dawczyk, J., et al., Film thickness and friction of ZDDP tribofilms. Tribology Letters, 2019. 67(2): p. 34

    work page 2019

Show all 38 references
  1. [9]

    Kadiric, and H

    Ueda, M., A. Kadiric, and H. Spikes, On the crystallinity and durability of ZDDP tribofilm. Tribology Letters, 2019. 67: p. 1-13

    2019

  2. [10]

    Optics Express, 2011

    Fletcher, L.B., et al., Direct femtosecond laser waveguide writing inside zinc phosphate glass. Optics Express, 2011. 19(9): p. 7929-7936

    2011

  3. [11]

    Journal of Luminescence,

    Caldiño, U., et al., New greenish-yellow and yellowish-green emitting glass phosphors: Tb3+/Eu3+ and Ce3+/Tb3+/Eu3+ in zinc phosphate glasses. Journal of Luminescence,

  4. [12]

    Journal of Luminescence, 2009

    Martínez-Martínez, R., et al., White light generation through the zinc metaphosp hate glass activated by Ce3+, Tb3+ and Mn2+ ions. Journal of Luminescence, 2009. 129(11): p. 1276-1280

    2009

  5. [13]

    Surface and Coatings Technology, 2006

    Niu, L.Y., et al., A study and application of zinc phosphate coating on AZ91D magnesium alloy. Surface and Coatings Technology, 2006. 200(9): p. 3021-3026

    2006

  6. [14]

    Sadeghi-Aghbash, M. and M. Rahimnejad, Zinc phosphate nanoparticles: a review on physical, chemical, and biological synthesis and their applications. Current Pharmaceutical Biotechnology, 2022. 23(10): p. 1228-1244

    2022

  7. [15]

    Journal of Non -Crystalline Solids, 2000

    Brow, R.K., The structur e of simple phosphate glasses. Journal of Non -Crystalline Solids, 2000. 263: p. 1-28

    2000

  8. [16]

    Rossi, and N.D

    Heuberger, R., A. Rossi, and N.D. Spencer, XPS study of the influence of temperature on ZnDTP tribofilm composition. Tribology Letters, 2007. 25(3): p. 185-196

    2007

  9. [17]

    Analytical and bioanalytical chemistry, 2012

    Crobu, M., et al., Chain-length-identification strategy in zinc polyphosphate glasses by means of XPS and ToF -SIMS. Analytical and bioanalytical chemistry, 2012. 403(5): p. 1415-1432

    2012

  10. [18]

    Chin, and S

    Liu, H., T. Chin, and S. Yung, FTIR and XPS studies of low -melting PbO-ZnO-P2O2 glasses. Materials chemistry and physics, 1997. 50(1): p. 1-10

    1997

  11. [19]

    Tribology letters, 1999

    Martin, J.M., Antiwear mechanisms of zinc dithiophosphate: a chemical hardness approach. Tribology letters, 1999. 6: p. 1-8

    1999

  12. [20]

    Tribology Letters, 1997

    Bancroft, G., et al., Mechanisms of tribochemica l film formation: stabilityof tribo -and thermally-generated ZDDP films. Tribology Letters, 1997. 3(1): p. 47-51

    1997

  13. [21]

    Rossi, and N.D

    Heuberger, R., A. Rossi, and N.D. Spencer, Pressure dependence of ZnDTP tribochemical film formation: a combinatorial approach. Tribology Letters, 2007. 28(2): p. 209-222

    2007

  14. [22]

    Dratva, and H

    Taylor, L., A. Dratva, and H. Spikes, Friction and wear behavior of zinc dialkyldithiophosphate additive. Tribology transactions, 2000. 43(3): p. 469-479. 19

    2000

  15. [23]

    Tribology Letters, 2025

    Spikes, H., Mechanisms of ZDDP—An Update. Tribology Letters, 2025. 73(1): p. 38

    2025

  16. [24]

    Zhang, J. and H. Spikes, On the Mechanism of ZDDP Antiwear Film Formation. Tribology Letters, 2016. 63(2): p. 24

    2016

  17. [25]

    McDermott, and J

    Aktary, M., M.T. McDermott, and J. Torkelson, Morphological evolution of films formed from thermooxidative decomposition of ZDDP. Wear, 2001. 247(2): p. 172-179

    2001

  18. [26]

    Rossi, and N.D

    Piras, F.M., A. Rossi, and N.D. Spencer, Combined in situ (ATR FT-IR) and ex situ (XPS) study of the ZnDTP-iron surface interaction. Tribology Letters, 2003. 15: p. 181-191

    2003

  19. [27]

    Wear, 1997

    Yin, Z., et al., Application of soft X -ray absorption spectroscopy in chemical characterization of antiwear films generated by ZDDP Part I: the effects of physical parameters. Wear, 1997. 202(2): p. 172-191

    1997

  20. [28]

    Tribology Letters, 2004

    Nicholls, M.A., et al., Chemomechanical properties of antiwear films using X -ray absorption microscopy and nanoindentation techniques. Tribology Letters, 2004. 17: p. 245-259

    2004

  21. [29]

    Canning, G., et al., Spectromicroscopy of tribological films from engine oil additives. Part I. Films from ZDDP's. Tribology letters, 1999. 6(3): p. 159-169

    1999

  22. [30]

    Tribology Letters, 2021

    Zhang, J., et al., Boundary friction of ZDDP tribofilms. Tribology Letters, 2021. 69: p. 1- 17

    2021

  23. [31]

    Journal of Non-Crystalline Solids, 2016

    Dobbelaere, T., et al., Plasma-enhanced atomic layer deposition of zinc phosphate. Journal of Non-Crystalline Solids, 2016. 444: p. 43-48

    2016

  24. [32]

    Oliver, W.C. and G.M. Pharr, An improved technique for determining hardness and elastic modulus using load and displacement sensing indentation experiments. Journal of materials research, 1992. 7(6): p. 1564-1583

    1992

  25. [33]

    Wetterstatistik Aachen 2020

    RWTH Aachen University Physikalisches Institut, A. Wetterstatistik Aachen 2020. 2020 25.02.25, 11:25 am]; Available from: https://wetterstation.physik.rwth- aachen.de/statistik_2020.php

    2020

  26. [34]

    Baba, and M

    Takebe, H., Y. Baba, and M. Kuwabara, Dissolution behavior of ZnO –P2O5 glasses in water. Journal of Non-Crystalline Solids, 2006. 352(28-29): p. 3088-3094

    2006

  27. [35]

    Ainsworth, and N.H

    Ruiz-Hernandez, S.E., R.I. Ainsworth, and N.H. de Leeuw, A molecular dynamics study of the effect of water diffusion into bio-active phosphate-based glass surfaces on their dissolution behaviour. Journal of Non-Crystalline Solids, 2020. 548: p. 120332

    2020

  28. [36]

    Bae, B.S. and M.C. Weinberg, Oxidation–reduction equilibrium in copper phosphate glass melted in air. Journal of the American Ceramic Society, 1991. 74(12): p. 3039 - 3045

    1991

  29. [37]

    Ueda, M. and H. Spikes, ZDDP Tribofilm Formation and Removal. Tribology Letters,

  30. [38]

    XRD of as deposited zinc phosphate sample shows an amorphous structure

    Supplementary Information Figure S 1. XRD of as deposited zinc phosphate sample shows an amorphous structure. Figure S 2. STEM image of as deposited zinc phosphate glass coating. 21 Figure S 3. Surface composition, obtained by XPS , for zinc phosphate coatings upon annealing

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