Synthesis of porous Ni-Ti shape-memory alloys by self-propagating high-temperature synthesis: Reaction mechanism and anisotropy in pore structure

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	Synthesis of porous Ni-Ti shape-memory alloys by self-propagating high-temperature synthesis: Reaction mechanism and anisotropy in pore structure
	B. Y. Li; L. J. Rong; Y. Y. Li; V. E. Gjunter
	2000
发表期刊	Acta Materialia
ISSN	1359-6454
卷号	48 期号:15 页码:3895-3904
摘要	Porous Ni-Ti shape-memory alloys (SMAs) have attracted a great deal of attention recently because they have a similar microstructure to human bone and have significant prospects in medical applications. In the present study, equiatomic porous Ni-Ti SMAs, especially those with an unusual kind of linear-aligned elongated pore structure, have been successfully prepared by self-propagating high-temperature synthesis (SHS) using elemental nickel and titanium powders. The porous Ni-Ti SMAs thus obtained have an open porous structure with about 60 vol.% porosity, and the channel size is about 400 mu m. The corresponding microstructural characteristics and the effect of preheating temperature on the microstructure have been investigated. It is found that the combustion temperature increases with increasing preheating temperature and results in melting of the NiTi compound above 450 degrees C. Moreover, the preheating temperature has been shown to have a significant effect on the microstructure of the SHS-synthesized porous Ni-Ti SMAs, and the mechanism of anisotropy in pole structure is attributed to the convective flows of Liquid and argon during combustion. (C) 2000 Acm Metallurgica Inc. Published by Elsevier Science Ltd. Ali rights reserved.
部门归属	acad sinica, inst met res, shenyang 110015, peoples r china. inst med mat & shape mem implants, tomsk 634034, russia.;li, by (reprint author), acad sinica, inst met res, shenyang 110015, peoples r china
关键词	Self-propagating High-temperature Synthesis (Shs) Porous Ni-ti Shape-memory Alloys Combustion Synthesis
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WOS记录号	WOS:000089632800008
引用统计	被引频次：275[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/37082
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	B. Y. Li,L. J. Rong,Y. Y. Li,et al. Synthesis of porous Ni-Ti shape-memory alloys by self-propagating high-temperature synthesis: Reaction mechanism and anisotropy in pore structure[J]. Acta Materialia,2000,48(15):3895-3904.
APA	B. Y. Li,L. J. Rong,Y. Y. Li,&V. E. Gjunter.(2000).Synthesis of porous Ni-Ti shape-memory alloys by self-propagating high-temperature synthesis: Reaction mechanism and anisotropy in pore structure.Acta Materialia,48(15),3895-3904.
MLA	B. Y. Li,et al."Synthesis of porous Ni-Ti shape-memory alloys by self-propagating high-temperature synthesis: Reaction mechanism and anisotropy in pore structure".Acta Materialia 48.15(2000):3895-3904.