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급속응고한 Ag-Sn-In 합금의 미세조직에 미치는 Misch Metal의 영향

Title
급속응고한 Ag-Sn-In 합금의 미세조직에 미치는 Misch Metal의 영향
Other Titles
The Effect of Misch Metal on the Microstructure of Rapidly solidified Ag-Sn-In Alloys
Author
남태운
Keywords
Contact material; Internal oxidation; Ag-Sn; Rapid solidification process; Misch metal
Issue Date
2007-06
Publisher
한국전기전자재료학회
Citation
전기전자재료학회논문지, v. 20, No. 6, Page. 561-565
Abstract
Because of a good wear resistance and a stable contact resistance, Ag-CdO is widely used as electrical contact material. But, the Cd-oxide mainly exists as a coarse particle and adversely affected to environment. As a reason, Ag-SnO2 alloy has been developed. The Sn-oxide maintains stable and fine particle even at high temperature. In order to investigate the effect of Misch metal (Mm) additional that affects the formation of the oxide and the formation of fine matrix Ag, we studied the microstructures and properties of Ag-Sn-In(-Mm) material fabricated by rapid solidification process. The experimental procedure were melting using high frequency induction, melt spinning, and internal oxidation. The Mm addition makes Ag matrix more fine than no Mm addition. The reason is that the addition of Misch metal decreased a latent heat of fusion of alloy, as a result the rapid solidification effect of alloy is increased. The maximum hardness shows at 0.3 wt%Mm. after that the hardness is decreased until 0.4 wt% Mm, but still larger than no Mm addition alloy. At 0.5 wt% Mm alloy, the precipitation of Misch metal causes a decrease of hardness than no Mm addition alloy.
URI
http://kiss.kstudy.com/thesis/thesis-view.asp?key=2850808https://repository.hanyang.ac.kr/handle/20.500.11754/106609
ISSN
1226-7945; 2288-3258
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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