Ni3Si系金属間化合物の熱間加工性の検討

概要

論文の詳細を見る
It is well known that Ni3Si intermetallic compounds have an excellent corrosion resistance in a H2S04 solution. However, these compounds are hard to be worked when prepared by the conventional ingot metallurgy process because of their poor ductility and the ease of segregatation. Therefore, mechanical alloying (MA) has been tried to prepare intermetallic compounds with improved workability. In this paper, we investigated a process based on the MA method that yields fine Ni-Si mixtures with improved workability. By controlling the initial compositions of the mixtures and the MA conditions, it is possible to obtain required ratios among α, β and γ phases in sintered-compacts. As a result of the developed process, the workability of the obtained sintered-compacts at high temperatures has been remarkably improved. This process could be applicable to other intermetallic-compound systems.
社団法人粉体粉末冶金協会の論文