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Effect of Carburization on the Mechanical Properties of Biomedical Grade Titanium Alloys 被引量:8

Effect of Carburization on the Mechanical Properties of Biomedical Grade Titanium Alloys
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摘要 Titanium cermets were successfully synthesized on the surface of biomedical grade titanium alloys by using sequential carburization method. The mechanical properties such as hardness, fracture toughness and plasticity were measured to estimate the potential application of titanium cermets. The results show that after carburization the surface hardness of titanium cermets was 778 HV, with a significant improvement of 128% compared with that of titanium alloys. In addition, the fracture toughness of titanium cermets was 21.5 × 10^6 Pa.m^1/2, much higher than that of other ceramics. Furthermore, the analysis of the loading-unloading curve in the nanoindentation test also indicates that the plasticity of titanium cermet reached 32.1%, a relatively high value which illustrates the combination of the metal and ceramics properties. The results suggest that sequential carburization should be an efficient way to produce titanium cermets with hard surface, high toughness and plasticity. Titanium cermets were successfully synthesized on the surface of biomedical grade titanium alloys by using sequential carburization method. The mechanical properties such as hardness, fracture toughness and plasticity were measured to estimate the potential application of titanium cermets. The results show that after carburization the surface hardness of titanium cermets was 778 HV, with a significant improvement of 128% compared with that of titanium alloys. In addition, the fracture toughness of titanium cermets was 21.5 × 10^6 Pa.m^1/2, much higher than that of other ceramics. Furthermore, the analysis of the loading-unloading curve in the nanoindentation test also indicates that the plasticity of titanium cermet reached 32.1%, a relatively high value which illustrates the combination of the metal and ceramics properties. The results suggest that sequential carburization should be an efficient way to produce titanium cermets with hard surface, high toughness and plasticity.
出处 《Journal of Bionic Engineering》 SCIE EI CSCD 2011年第1期86-89,共4页 仿生工程学报(英文版)
基金 Acknowledgments The authors wish to thank the National Natural Science Foundation of China (Grant No. 51005234 and 50905180), the Foundation of China University of Mining and Technology (Grant No. 2009A056) and the Natural Science Foundation of Jiangsu Province (Grant No. BK2008005).
关键词 titanium alloys HARDNESS SURFACES CERAMICS sequential carburization titanium alloys, hardness, surfaces, ceramics, sequential carburization
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