Effect of Fabricating Temperature on Hardness Characteristics of $Nb/MoSi_2$ Laminate Composite

J. Ocean Eng. Technol. 1999;13(4):37-44.

Lee, Sang-Pill;Yoon, Han-Ki;

$Nb/MoSi_2$ 적층복합재료의 경도특성에 미치는 제조온도의 영향

이상필;윤한기;

일본 교토대 에너지 이공학연구소;동의대학교 기계공학과;

Keywords: $Nb/MoSi_2$ Laminate Composite, Fabricating Temperature, Grain Size, Interfacial Reaction Layer, Micro Vickers Hardness, Fracture Mechanism

핵심용어: $Nb/MoSi_2$ 적층복합재료, 성형온도, 결정크기, 계면반응층, 마이크로 비커스 경도, 파괴 기구

Abstract

Hardness characteristics and microstructures of $Nb/MoSi_2$ laminate composites were evaluated from the variation of fabricating conditions such as preparation temperature, applied pressure and pressure holding time. $Nb/MoSi_2$ laminate composites composed of $MoSi_2$ powder and Nb sheets were fabricated by the hot press. From experimental results, it was found that the lamination from Nb sheet and $MoSi_2$ powder was an excellent strategy to improve hardness characteristics of monolithic $MoSi_2$. However, interfacial reaction products like(Nb, Mo)$SiO_2;and;Nb2Si_3$ formed at the interface of $Nb/MoSi_2$ and increased with fabricating temperature.