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

Xin Lu, Bo Sun, Teng Fei Zhao, Lu Ning Wang, Cheng Cheng Liu, Xuan Hui Qu

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

Ti-Mo alloys with various Mo contents from 6wt% to 14wt% were processed by spark plasma sintering based on elemental powders. 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°C with the increase in Mo content. The microstructure of the Ti-(6-12)Mo alloy consists of acicular a phase surrounded by equiaxed grains of β phase, while the Ti-14Mo alloy only contains single β phase. A small amount of fine a lath precipitated from β phase contributes to the improvement in strength and hardness of the alloys. Under the sintering condition at 1250°C, 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.

Original languageEnglish
Pages (from-to)479-486
Number of pages8
JournalInternational Journal of Minerals, Metallurgy and Materials
Volume21
Issue number5
DOIs
Publication statusPublished - 2014 May

Keywords

  • Mechanical properties
  • Microstructure
  • Spark plasma sintering
  • Titanium alloys

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Geochemistry and Petrology
  • Metals and Alloys
  • Materials Chemistry

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