热爆法制备多孔NiTi形状记忆合金

Porous NiTi shape memory alloys (SMAs) havebeen widely used in medical fields such as hard tis-sue implant and medical instrument because of itsspecial pseudoelasticty, which can accommodate thedeformation of hard tissue, and its attractive combi-nation of properties such as excellent mechanicalproperties, good corrosion resistance, biocompati-bility and unique shape memory effect1,2]. Moreo-ver, its porous structure allows the ingrowths of newtissue along with the transport of body fluids, …

Porous NiTi shape memory alloys prepared by thermal explosion method

Thermal explosion method was used to prepare porous NiTi shape memory alloy. The process of thermal explosion was investigated. The effect of process parameters on thermal explosion reaction and properties of products was analyzed. The results showed heating rates green density, particle size of initial powder strongly affected combustion temperature, porosity and compressive strength of final products. The mechanism of thermal explosion and the microstructure of reacted products were studied by XRD and SEM photographs. The results showed the final products mainly comprised of NiTi, Ti2 Ni and TiNi3 phases and their strength decreased with the increase of porosity.