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Vol.53, No.6, 420 ~ 426, 2015
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| Title |
| Interfacial Reaction at the Joint between Mo-41Re Alloy and SiC induced by High-Temperature Annealing |
| 장승식 Seung Sik Jang , 김민규 Min Gyu Kim , 박성진 Seong Jin Park , 임성택 Seong Taek Lim , 오용준 Yong Jun Oh |
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| 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) |
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| Key Words |
| Re alloy, ceramics, diffusion bonding, interfaces, transmission electron microscopy, TEM |
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