摘要
Porous Ti35Nb alloy with a porosity of 66% was made by a powder metallurgical method, and then it was treated by a standard treatment for activating the surface of Ti implant materials involving alkali and heat treatment. The alkali and heat treatment causes damages of the struts of the porous Ti35Nb in the form of reaction products layer, grain-pullout and cracks. Consequently, it leads to a significant degradation of the strength of the porous alloy. The effect of the alkali and heat treatment on the strength of the porous alloy was discussed.
采用粉末冶金法制备孔隙率为66%的Ti35Nb多孔合金,并用标准的碱处理和热处理方法对该多孔合金进行表面活性处理,研究表面活性处理对多孔合金孔结构和力学性能的影响。结果表明,碱处理对多孔合金孔壁有很强的腐蚀作用,在孔壁上产生了微裂纹和颗粒脱落等缺陷,这些缺陷导致多孔合金的强度显著下降。
基金
Project(2010FJ3132)supported by the Scientific and Technological Project of Hunan Science and Technology Commission,China
Project(09A089)supported by the Scientific Research Fund of Hunan Provincial Education Department,China
