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Fusion welding of refractory metals and ZrB2-SiC-ZrC ceramics

Journal Article · · Journal of the European Ceramic Society
 [1];  [1];  [1];  [1];  [2]
  1. Missouri Univ. of Science and Technology, Rolla, MO (United States)
  2. Kansas City National Security Campus (KCNSC), Kansas City, MO (United States)

Molybdenum and a molybdenum alloy were fusion welded to ZrB2-based ceramics to determine if the electrical and thermal properties of the metals and ceramics affected their weldability. Commercial ceramic powders were hot pressed, machined into coupons, and preheated to 1600 °C before joining the ceramics to commercial metals using plasma arc welding. Weldability varied as indicated by the range of porosity observed within the fusion zones. Measured thermal and electrical properties appeared to have little to no effect on the weldability of metal-ceramic welds despite the large range of values measured across each property. Differences in melting temperatures between metal and ceramic coupons did affect weldability by changing the weld penetration depth into ceramic coupons. Finally, future studies on metal-ceramic welds are suggested to investigate the effect that work function, melt viscosity, wetting, or other properties have on weldability.

Research Organization:
Kansas City Nuclear Security Campus (KCNSC), Kansas City, MO (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0002839
OSTI ID:
1896447
Report Number(s):
NSC-614-4376
Journal Information:
Journal of the European Ceramic Society, Journal Name: Journal of the European Ceramic Society Journal Issue: 13 Vol. 42; ISSN 0955-2219
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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