粉体および粉末冶金
Online ISSN : 1880-9014
Print ISSN : 0532-8799
ISSN-L : 0532-8799
燃焼合成法で工業生産したTiNi形状記憶金属間化合物線材の相変態温度に及ぼす熱処理の影響
海江田 義也
著者情報
ジャーナル オープンアクセス

2003 年 50 巻 5 号 p. 333-340

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抄録
TiNi intermetallic compound, which is the most important shape memory material, is industrially manufactured with the combustion synthesis process by using the heat of formation of Ti and Ni starting elemental powders. One kind of specimen with Ni-rich composition from stoichiometric value (Ti:Ni=1:1), 51.6 atomic%Ni, which shows the superelasticity at room temperature, is produced because the superelastic material is much in demand. In the present paper, the influence of the heat treatment conditions on the transformation temperatures of the specimen is mainly investigated from the viewpoint of practical use. The tendency of the transformation temperatures are divided into two regions, those are in the heat treatment temperatures under 800K and above 800K. The transformation temperatures decrease with the increase in heat treatment temperature up to 800K. In this case, it is not so dependent on the heat treatment time. The heat treatment temperature above 800K becomes a transition region where the transformation temperatures show a tendency to increase. In this case, the transformation temperatures show the tendency to increase with the heat treatment time. The transformation temperatures increase because Ti3Ni4 precipitates and Ni content in the matrix decreases in the heat treatment temperature region above 800K.
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© 社団法人粉体粉末冶金協会

本論文はCC BY-NC-NDライセンスによって許諾されています.ライセンスの内容を知りたい方は,https://creativecommons.org/licenses/by-nc-nd/4.0/deed.jaでご確認ください.
https://creativecommons.org/licenses/by-nc-nd/4.0/deed.ja
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