한국분말야금학회:학술대회논문집 (Proceedings of the Korean Powder Metallurgy Institute Conference)
- 한국분말야금학회 2006년도 Extended Abstracts of 2006 POWDER METALLURGY World Congress Part 1
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- Pages.165-166
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- 2006
Powder Fabrication of Nb-Ti Alloys Using Hydrogenation Process
- Semboshi, Satoshi (Department of Materials Science, Osaka Prefecture University) ;
- Masahashi, Naoya (Institute for Materials Research, Tohoku University) ;
- Konno, Toyohiko J. (Department of Materials Science, Osaka Prefecture University) ;
- Hanada, Shuji (Institute for Materials Research, Tohoku University)
- 발행 : 2006.09.24
초록
Nb-Ti alloys were hydrogenated to prepare fine and contamination-free powders. Cracks were introduced in the alloys when they were annealed at 1473 K and cooled in a hydrogen atmosphere. The fragments produced by hydrogen-induced cracking are brittle and the friability enhanced with the Ti content of the alloy, which is beneficial for further refinement of particle size. We also demonstrate that Nb-Ti powders with the average particle size less than 1 m can be produced by ball milling at a temperature lower than 203 K. Furthermore, hydrogen-free powders can then be obtained by annealing above the temperature corresponding to hydrogen desorption from Nb solid solution.