논문 해외 국제전문학술지(SCI급) Growth kinetics and isothermal oxidation behavior of a Si pack cementationcoated Mo-Si-B alloy
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2019-09
- 저자명 Kwangsu Choia,b , Wonchul Yanga , Kyeong-Ho Baikc , Youngmoo Kimd , Seong Leed , Sangyeob Leea , Joon Sik Parka,⁎
- 학술지명 Applied Surface Science
- 발행처명 ELSEVIER
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 7
홈페이지
논문 초록 (Abstract)
In this study, coating-layer growth kinetics were determined to understand coating-layer growth behavior of Si pack cementation coatings on Mo-3Si-1B (wt%) alloys. When a pack powder mixture composed of Al2O3, Si and NaF was loaded in an alumina crucible with a substrate, a MoSi2 outer layer formed with a MoB phase between the outer layer and substrate. The average growth constant coefficient (k0) was estimated to be ~1899 μm/h1/2, and the activation energy for the growth rate of the coated layer thickness was estimated to be ~ 80 kJ/mol in the examined coating temperature range. The experimental results well matched the proposed equation for the growth kinetics of the coated layer on Mo-3Si-1B alloys. The oxidation behavior of the coating layer was also discussed in terms of the structural analysis.