Pith Number

pith:YSCMYM3I

pith:2026:YSCMYM3ITTVKSSY4QKKZ5RMF4M

not attested not anchored not stored refs resolved

Burst-Mode Ultrafast Laser Welding of Sapphire and Invar Alloy Across Large Interfacial Gaps up to 10 $\mu$m

Feng Chen, Guochang Jiang, Nan Li, Qingwei Zhang, Rong Su, Rongxian Wen, Shanglu Yang, Yitong Chen, Yu Wang, Yuxuan Li

Burst-mode ultrafast laser pulses bridge 10-micrometer gaps between sapphire and Invar alloy to reach 6.3 MPa shear strength.

arxiv:2605.13191 v1 · 2026-05-13 · physics.optics

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\pithnumber{YSCMYM3ITTVKSSY4QKKZ5RMF4M}

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2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

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The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Claims

C1strongest claim

Notably, at a 10 μm gap, where single-pulse welding fails, burst-mode ultrafast laser welding enables interfacial bridging with a maximum shear strength of 6.3 MPa, representing the highest level among published studies.

C2weakest assumption

That the observed interfacial bridging and strength at large gaps result primarily from the temporally distributed energy deposition of burst-mode pulses rather than uncharacterized factors such as surface preparation, exact focusing conditions, or material-specific chemistry.

C3one line summary

Burst-mode ultrafast laser welding joins sapphire and Invar across 10 μm gaps with 6.3 MPa shear strength.

References

48 extracted · 48 resolved · 0 Pith anchors

[1] Femtosecond laser welding of sapphire-copper using a thin film titanium interlayer, 2024

[2] Laser welding of fiber array units, 2024

[3] Cold spray additive manufacturing of Invar 36 alloy: microstructure, thermal expansion and mechanical properties, 2021

[4] High-strength and impermeable sapphire/aluminum joints fabricated by Ultrafast laser microwelding: Microstructures and joining mechanism, 2025

[5] Microstructural and properties of Ultrafast laser selective micro-welding joints of sapphire and Invar alloys, 2023

Formal links

2 machine-checked theorem links

Receipt and verification

First computed	2026-05-18T03:08:48.839667Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c484cc33689ceaa94b1c82959ec585e317d080b3cfaaada7d8ce841dd6d49468

Aliases

arxiv: 2605.13191 · arxiv_version: 2605.13191v1 · doi: 10.48550/arxiv.2605.13191 · pith_short_12: YSCMYM3ITTVK · pith_short_16: YSCMYM3ITTVKSSY4 · pith_short_8: YSCMYM3I

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/YSCMYM3ITTVKSSY4QKKZ5RMF4M \
  | 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: c484cc33689ceaa94b1c82959ec585e317d080b3cfaaada7d8ce841dd6d49468

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "50b3d53682bd056a8cdda9e374a9928704abc7d6f2a600446d3e83d8beedb6b7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2026-05-13T08:49:17Z",
    "title_canon_sha256": "34388c061850bd5be5d17bc6e4ac5e9f08f31be55c7a6f23aecf098d2cb79ebe"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.13191",
    "kind": "arxiv",
    "version": 1
  }
}