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Article
Fusion Welding of Refractory Metals and ZrB2-SiC-ZrC Ceramics
Journal of the European Ceramic Society
  • Jecee D. Jarman
  • William Fahrenholtz, Missouri University of Science and Technology
  • Greg Hilmas, Missouri University of Science and Technology
  • Jeremy Lee Watts, Missouri University of Science and Technology
  • Tieshu Huang
Abstract

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. Future studies on metal-ceramic welds are suggested to investigate the effect that work function, melt viscosity, wetting, or other properties have on weldability.

Department(s)
Materials Science and Engineering
Comments

National Nuclear Security Administration, Grant DE-NA0002839

Keywords and Phrases
  • Borides,
  • Carbides,
  • Joints/joining,
  • Refractory metals,
  • Ultra-high temperature ceramics
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2023 Elsevier, All rights reserved.
Publication Date
10-1-2022
Publication Date
01 Oct 2022
Citation Information
Jecee D. Jarman, William Fahrenholtz, Greg Hilmas, Jeremy Lee Watts, et al.. "Fusion Welding of Refractory Metals and ZrB2-SiC-ZrC Ceramics" Journal of the European Ceramic Society Vol. 42 Iss. 13 (2022) p. 5195 - 5207 ISSN: 1873-619X; 0955-2219
Available at: http://works.bepress.com/william-fahrenholtz/315/