Pith Number

pith:G7IBBP7B

pith:2026:G7IBBP7B5YWVYJHH4UQMOK7AOY

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High-temperature behavior of amorphous alumina coatings: Insights from in-situ nanoindentation and X-ray diffraction studies

A. Zaborowska, E. Wyszkowska, F. Di Fonzo, J.H. Neethling, J. Jagielski, J. OConnell, L. Kurpaska, M. Frelek-Kozak, M. Zielinski, Q. Xu, R. Diduszko, S. Papanikolaou

Amorphous alumina coatings show gradual hardness drop with constant Young's modulus up to 650°C

arxiv:2605.13528 v1 · 2026-05-13 · cond-mat.mtrl-sci

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Claims

C1strongest claim

The hardness of the amorphous coating experiences a gradual, constant decrease with temperature, while the Young modulus value remains constant in the whole temperature range. ... First, thermally activated crystallization was observed at 700C. Intermediate alumina phases were present up to 950C, while above this temperature, exclusively the thermodynamically stable alpha-Al2O3 was observed.

C2weakest assumption

That the gradual hardness decrease is caused by an accelerating bond-switching mechanism and that the tested in-situ conditions accurately represent real operating conditions in nuclear power plants.

C3one line summary

Amorphous Al2O3 coatings show steadily decreasing hardness but constant Young's modulus from 25-650C, remain non-crystalline, and crystallize via intermediate phases to stable alpha-Al2O3 above 950C.

References

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[1] Introduction Developing materials for extreme applications is very challenging as it requires consideration of many factors and complex relations that can affect the system's performance. This is best

[2] This confirms that amorphous alumina oxide show significant potential to be used as a light, high-strength, and damage -tolerant engineering material which could be applied in Gen

[3] It was reported that PLD -grown coatings generally reproduce the roughness of the substrate [41] 2022

[4] -“ ≡ the phase is not observed; “+

[5] The mechanical investigation showed that the hardness of the amorphous coating decreases with the temperature

Receipt and verification

First computed	2026-05-18T02:44:24.269441Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

37d010bfe1ee2d5c24e7e520c72be07611fe9c1111ef783bc90685524dd6ff3b

Aliases

arxiv: 2605.13528 · arxiv_version: 2605.13528v1 · doi: 10.48550/arxiv.2605.13528 · pith_short_12: G7IBBP7B5YWV · pith_short_16: G7IBBP7B5YWVYJHH · pith_short_8: G7IBBP7B

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/G7IBBP7B5YWVYJHH4UQMOK7AOY \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 37d010bfe1ee2d5c24e7e520c72be07611fe9c1111ef783bc90685524dd6ff3b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3c1156e712b7eb18060983c8fdf94dcc51cb4e4a239cb211ddd933fc0d8b25bc",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "cond-mat.mtrl-sci",
    "submitted_at": "2026-05-13T13:40:50Z",
    "title_canon_sha256": "2c22faab5c598092be62b817a9800bccfa78c38cb6de6963326f99d702139bbc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.13528",
    "kind": "arxiv",
    "version": 1
  }
}