Microstructure and Mechanical Properties of (TiB2 + SiC) Reinforced Ti3SiC2 Composites Synthesized by In Situ Hot Pressing. Issue 4 (26th May 2016)

• Record Type: Journal Article
• Authors: Pan, Limei; Song, Kai; Gu, Jian; Qiu, Tai; Yang, Jian
• Is Part Of: International journal of applied ceramic technology. Volume 13:Issue 4(2016:Jul./Aug.)
• Page Start: 629
• Page End: 635
• Publication Date: 2016-05-26
• Subjects: (TiB2 + SiC)/Ti3SiC2 composites -- in situ synthesis -- microstructure -- mechanical properties; Ceramics -- Periodicals; Ceramics -- Technological innovations -- Periodicals; 620.1405
• DOI: 10.1111/ijac.12544
• Languages: English
• ISSNs: 1546-542X

Abstract

Abstract : Fully dense (TiB2 + SiC) reinforced Ti3 SiC2 composites with 15 vol% TiB2 and 0–15 vol% SiC were designed and synthesized by in situ reaction hot pressing. The increase in SiC content promoted densification and significantly inhibited the growth of Ti3 SiC2 grains. The in situ incorporated TiB2 and SiC reinforcements showed columnar and equiaxed grains, respectively, providing a strengthening–toughening effect by the synergistic action of particulate reinforcement, grain's pulling out, "self‐reinforcement, " crack deflection, and grain refining. A maximum bending strength of 881 MPa and a fracture toughness of 9.24 MPam 1/2 were obtained at 10 vol% SiC. The Vickers hardness of the composites increased monotonously from 9.6 to 12.5 GPa.