采用两步发泡粉末冶金法制备的多孔Ti-Nb-Zr合金的相组成、微观结构及力学性能
Phase composition, microstructure, and mechanical properties of porous Ti-Nb-Zr alloys prepared by a two-step foaming powder metallurgy method.
作者信息
Rao X, Chu C L, Zheng Y Y
机构信息
School of Materials Science and Engineering and Jiangsu Key Laboratory for Advanced Metallic Materials, Southeast University, Nanjing 211189, China.
School of Materials Science and Engineering and Jiangsu Key Laboratory for Advanced Metallic Materials, Southeast University, Nanjing 211189, China.
出版信息
J Mech Behav Biomed Mater. 2014 Jun;34:27-36. doi: 10.1016/j.jmbbm.2014.02.001. Epub 2014 Feb 7.
Porous Ti-Nb-Zr alloys with different porosities from 6.06 to 62.8% are prepared by a two-step foaming powder metallurgy method using TiH2, Nb, and Zr powders together with 0 to 50wt% of NH4HCO3. The effects of the amounts of Nb and Zr as well as the sintering temperature (1473 to 1673K) on their phase composition, porosity, morphology, and mechanical characteristics are investigated. By controlling the porosity, Nb and Zr concentrations as well as the sintering temperature, porous Ti-Nb-Zr alloys with different mechanical properties can be obtained, for example, the hardness between 290 and 63HV, the compressive strength between 1530.5 and 73.4MPa, and the elastic modulus between 10.8 and 1.2GPa. The mechanical properties of the sintered porous Ti-Nb-Zr alloys can be tailored to match different requirements for the human bones and are thus potentially useful in the hard tissue implants.
采用两步发泡粉末冶金法，以氢化钛、铌和锆粉末以及0至50wt%的碳酸氢铵为原料，制备了孔隙率在6.06%至62.8%之间的多孔钛铌锆合金。研究了铌和锆的含量以及烧结温度（1473至1673K）对其相组成、孔隙率、形态和力学性能的影响。通过控制孔隙率、铌和锆的浓度以及烧结温度，可以获得具有不同力学性能的多孔钛铌锆合金，例如，硬度在290至63HV之间，抗压强度在1530.5至73.4MPa之间，弹性模量在10.8至1.2GPa之间。烧结多孔钛铌锆合金的力学性能可以进行调整，以满足对人体骨骼的不同要求，因此在硬组织植入物中具有潜在的应用价值。
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