열처리공학회지 (Journal of the Korean Society for Heat Treatment)
- 제8권2호
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- Pages.127-136
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- 1995
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- 1225-1070(pISSN)
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- 2508-4046(eISSN)
팩 세멘테이션에 의한 Al 및 Cr의 동시 코팅
Codeposition of Al and Cr by pack cementation
- Sohn, Hee-Sik (Agency for Defense Development) ;
- Lee, Yoon-Je (Dept. of Metallurgical Engineering, Yonsei Univ.) ;
- Kim, Moon-Il (Dept. of Metallurgical Engineering, Yonsei Univ.)
- 발행 : 1995.06.30
초록
The simultaneous addition of Al and Cr to the surface of Ni-and Fe-base alloy provides enhanced resistance to oxidation and corrosion in high temperatures. However, because of the large differences in thermodynamic stabilities of the volatile halides of Al and Cr, the codeposition of Al and Cr by halideactivated pack cementation is only possible for very specific, limited combinations of conditions. In this study, the experiments on the combinations of various metallic source powders and activators were conducted in order to obtain codeposition layers of Al and Cr on Ni with adequate composition by pack cementation. When Cr-Al masteralloy was used as a source powder, it was not easy to control Al and Cr content sensitively in the coating layers. On the other hand, when pure Cr and Al powder was used,
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