カルシウム熱還元法により作製された Ti-Ni 合金粉末の特性

概要

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The fine particle powder of TiNi was made from TiO_2 and Ni powder with Ca as the reducing agent using the calciothermic reduction method. The fine particle powder of TiNi of the final production made by this process had irregular shapes and various size. A particle of this powder specimen consisted of many fine grains. The composition fluctuation was observed in this particle. The composition of these grains was mainly TiNi but that of the small part of specimen was Ti_2Ni. The main peaks of X-ray diffraction pattern at room temperature show that this powder has the parent phase structure of TiNi and some diffrent peaks from impurity were observed. The martensitic transformation start temperature, Ms, was estimated to be 277-309K.shape memory alloyTiNimartensitic transformationcalciothermic reduction method
東北大学の論文