Effect of Carburization on the Mechanical Properties of Biomedical Grade Titanium Alloys

• Published in: Journal of bionics engineering Vol. 8; no. 1; pp. 86 - 89
• Main Authors: Luo, Yong, Jiang, Haibo, Cheng, Gang, Liu, Hongtao
• Format: Journal Article
• Language: English
• Published: Singapore Elsevier Ltd 01.03.2011; Springer Singapore
• Subjects: Artificial Intelligence; Biochemical Engineering; Bioinformatics; Biomaterials; Biomedical Engineering and Bioengineering; Biomedical Engineering/Biotechnology; ceramics; Engineering; hardness; sequential carburization; surfaces; titanium alloys; 力学性能; 宾夕法尼亚州; 断裂韧性; 生物医学; 表面渗碳; 表面硬度; 金属陶瓷; 钛合金; sequential carburization; hardness; ceramics; titanium alloys; surfaces
• ISSN: 1672-6529; 2543-2141
• DOI: 10.1016/S1672-6529(11)60004-8

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.