Microstructure and mechanical properties of spark plasma sintered Ti-Mo alloys for dental applications

• Published in: International journal of minerals, metallurgy and materials Vol. 21; no. 5; pp. 479 - 486
• Main Authors: Lu, Xin, Sun, Bo, Zhao, Teng-fei, Wang, Lu-ning, Liu, Cheng-cheng, Qu, Xuan-hui
• Format: Journal Article
• Language: English
• Published: Beijing University of Science and Technology Beijing 01.05.2014; Springer Nature B.V; State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China%School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
• Subjects: Alloys; Beta phase; Ceramics; Characterization and Evaluation of Materials; Chemistry and Materials Science; Composites; Compressive strength; Corrosion and Coatings; Dental alloys; Dental materials; Diamond pyramid hardness; Glass; Hardness; Materials Science; Mechanical properties; Metallic Materials; Microstructure; Modulus of elasticity; Molybdenum; Natural Materials; Plasma sintering; Sintering (powder metallurgy); Spark plasma sintering; Surfaces and Interfaces; Thin Films; Ti-Mo合金; Titanium; Titanium base alloys; Tribology; 力学性能; 应用; 放电等离子烧结; 显微组织; 烧结温度; 牙科; 维氏硬度; microstructure; titanium alloys; spark plasma sintering; mechanical properties
• ISSN: 1674-4799; 1869-103X
• DOI: 10.1007/s12613-014-0932-7

Ti-Mo alloys with various Mo contents from 6wt% to 14wt% were processed by spark plasma sintering based on elemental pow- ders. The influence of sintering temperature and Mo content on the microstructure and mechanical properties of the resulting alloys were investigated. For each Mo concentration, the optimum sintering temperature was determined, resulting in a fully dense and uniform microstructure of the alloy. The optimized sintering temperature gradually increases in the range of 1100-1300℃ with the increase in Mo content. The microstructure of the Ti-（6-12）Mo ahoy consists of acicular α phase surrounded by equiaxed grains of 13 phase, while the Ti-14Mo al- loy only contains single 13 phase. A small amount of fine α lath precipitated from 13 phase contributes to the improvement in strength and hardness of the alloys. Under the sintering condition at 1250℃, the Ti-12Mo alloy is found to possess superior mechanical properties with the Vickers hardness of Hv 472, the compressive yield strength of 2182 MPa, the compression rate of 32.7%, and the elastic modulus of 72.1 GPa. These results demonstrate that Ti-Mo alloys fabricated via spark plasma sintering are indeed a perspective candidate alloy for dental applications.