Preparation and characterization of porous titanium using space-holder technique

作     者：NIU Wenjuan BAI Chenguang QIU Guibao WANG Qiang WEN Liangying CHEN Dengfu DONG Lingyan 

作者机构：College of Materials Science and Engineering Chongqing University Chongqing 400044 China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2009年第28卷第4期

页      面：338-342页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0825[工学-航空宇航科学与技术] 

基　　金：supported by the National Natural Science Foundation of China (No. 50504020) the Chongqing Natural Science Foundation, China (No. 2008BB4051) 

主　　题：powder metallurgy porous titanium space-holder pore morphology mechanical properties 

摘      要：Titanium-based porous materials can be used in structural applications and medical implants because of their excellent mechanical properties at elevated temperatures, good corrosion resistance and wonderful biocompatibility. However, most of the methods used to produce the porous metal can only give limited porosity and uncontrollable pore morphologies. In the present study, a newly developed method of powder metallurgy using the space-holder technique was used to fabricate porous titanium with controllable porosity. The morphological features and mechanical properties of the products were fully investigated. The results show that the porosity is in the range of 55%-75%, and the mean pore size, with an average sphericity of -0.72, is 600 μm. The plateau stresses vary between 10 MPa and 35 MPa. As predicted by the Gibson-Ashby model, the plateau stress decreases with increasing porosity.