Influence of the sintering temperature on the microstructure, mechanical properties and densification characteristics of (TiB + TiC)/TC4 composite. (17th December 2021)

• Record Type: Journal Article
• Authors: Hu, Zheng-Yang; Peng, Hai-Chun; Zhang, Zhao-Hui; Song, Peng; Chen, Ming; Ding, Yu-Sheng; Liang, Yue-Ying; Li, Shao-min
• Is Part Of: Materials research express. Volume 8:Number 12(2021)
• Publication Date: 2021-12-17
• Subjects: titanium matrix composite -- spark plasma sintering -- densification mechanism -- mechanical property; Materials science -- Research -- Periodicals; Materials science -- Periodicals; 620.11
• DOI: 10.1088/2053-1591/ac40b7
• Languages: English
• ISSNs: 2053-1591

Abstract

Abstract: A hybrid of TiB whiskers and TiC particles reinforced TC4 matrix composites were in situ synthesized by spark plasma sintering (SPS) using a TC4-0.6wt.% B4 C powder mixture at temperatures range from 550 °C to 1150 °C. The effect of sintering temperature on microstructure, grain size, mechanical properties and densification process of the (TiB + TiC)/ TC4 matrix composites were investigated. The composite sintered at 1050 °C has the highest tensile strength (1129.0 MPa), yield strength (1077.8 MPa) and plasticity (7.1%). The aspect ratio of TiB whiskers increases almost linearly below 1050 °C and its highest value is 33.2. The grain size of TiC increases with the increase of sintering temperature, and rapid growth occurs in the range of 850 °C to 950 °C. The composite sintered body appears four shrinkage stages before applying sintering pressure. The corresponding peak temperatures are 663 °C, 758 °C, 840 °C and 994 °C, respectively.