等离子旋转电极雾化法制备增材制造用形状记忆TiNi粉末

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Bibliographic Details
Published in	中国有色金属学报：英文版 Vol. 27; no. 12; pp. 2647 - 2655
Main Author	陈刚;赵少阳;谈萍;殷京瓯;周全;葛渊;李增峰;王建;汤慧萍;Peng CAO
Format	Journal Article
Language	English
Published	2017
Subjects	雾化;等离子旋转电极雾化;TiNi;粒度;马氏体相变
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ISSN	1003-6326

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Bibliography:	atomization; plasma rotating electrode process; TiNi; particle size; martensitic transformation 43-1239/TG This study aimed to produce spherical TiNi powders suitable for additive manufacturing by plasma rotating electrode process(PREP).Scanning electron microscopy,X-ray diffractometry and differential scanning calorimetry were used to investigate the surface and inner micro-morphology,phase constituent and martensitic transformation temperature of the surface and inner of the atomized TiNi powders with different particle sizes.The results show that the powder surface becomes smoother and the grain becomes finer gradually with decreasing particle size.All the powders exhibit a main B2-TiNi phase,while large powders with the particle size≥178μm contain additional minor Ti2Ni and Ni3Ti secondary phases.These secondary phases are a result of the eutectoid decomposition during cooling.Particles with different particle sizes have experienced different cooling rates during atomization.Various cooling rates cause different martensitic transformation temperatures and routes of the TiNi powders;in particular,the transformation temperature decreases with decreasing particle size.
ISSN:	1003-6326