한국분말야금학회지 Vol. 26 No. 5 (p.415-420)

SiAlON의 절삭성능에 미치는 소결조제와 조성의 영향에 대한 연구

Effect of Sintering Additive and Composition on Cutting Performance of SiAlON
키워드 :
SiAlON,HRSA(Heat Resistant Super-Alloys),Color,Fracture toughness,Cutting test

목차

Abstract
1. 서 론
2. 실험 방법
3. 결과 및 고찰
4. 결 론
References

초록

SiAlON ceramics are used as ceramic cutting tools for heat-resistant super alloys (HRSAs) due to their excellent fracture toughness and thermal properties. They are manufactured from nitride and oxide raw materials. Mixtures of nitrides and oxides are densified via liquid phase sintering by using gas pressure sintering. Rare earth oxides, when used as sintering additives, affect the color and mechanical properties of SiAlON. Moreover, these sintering additives influence the cutting performance. In this study, we have prepared Ybm/3Si12-(m+n)Alm+nOnN16-n (m = 0.5; n = 0.5, 1.0) ceramics and manufactured SiAlON ceramics, which resulted in different colors. In addition, the characteristics of the sintered SiAlON ceramics such as fracture toughness and microstructure have been investigated and results of the cutting test have been analyzed.