| Title |
Interfacial Reaction at the Joint between Mo-41Re Alloy and SiC induced by High-Temperature Annealing |
| Authors |
장승식(Seung Sik Jang); 김민규(Min Gyu Kim); 박성진(Seong Jin Park); 임성택(Seong Taek Lim); 오용준(Yong Jun Oh) |
| DOI |
https://doi.org/10.3365/KJMM.2015.53.6.420 |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
Re alloy; ceramics; diffusion bonding; interfaces; transmission electron microscopy; TEM |
| Abstract |
Interfacial reaction of metal-ceramic joints is of great interest because of their potential applicability to components operating in high-temperature environments. In this work, Mo-41Re alloy with sputter-deposited SiC coating was annealed at 1300~1500℃, and the reaction at the alloy/SiC interface was investigated. On annealing at 1500℃, the element Mo in the Mo-41Re alloy significantly diffused toward the SiC layer, reacted with SiC, and formed a MoC layer. The reaction resulted in the depletion of Mo in the alloy adjacent to the surface. A brittle σ-MoRe phase that was detrimental to joint reliability, formed at a depth of 10~20 μm from the alloy surface. After annealing at lower temperature (1300℃), the σ-MoRe phase was formed less deep (3~5 μm), but with higher density, in the alloy. The reaction at both temperatures additionally resulted in Mo silicides and voids at the interface.(Received July 11, 2014) |