DataVXInternational Journal of Applied Ceramic TechnologyPaper
journal article·2020-11

Microstructure and mechanical property of (TiB 2 ‐SiC) agglomerate‐toughened B 4 C‐TiB 2 ‐SiC composites

Shuai Wang, Yangyang Deng, Shuaibo Gao, Mingsheng Yang, Pengfei Xing

International Journal of Applied Ceramic Technology· Volume 17· Issue 6
Publisher page
Source abstract

Abstract

Abstract B 4 C‐TiB 2 ‐SiC composites toughened by (TiB 2 ‐SiC) agglomerates were prepared via reactive hot pressing with B 4 C and TiSi 2 as raw materials. Phase composition, microstructure, and mechanical properties of the fabricated composites were investigated. The function of (TiB 2 ‐SiC) agglomerates was analyzed, and the strengthening and toughening mechanism were also discussed. Results indicated that some of the in situ formed TiB 2 and SiC were interlocked to form special (TiB 2 ‐SiC) agglomerates in the matrix. The good comprehensive performances of 510 MPa flexural strength, 5.84 MPa·m 1/2 fracture toughness, and 31.93 GPa hardness were obtained in the composites fabricated with 30 wt% TiSi 2 . The in situ introduced fine TiB 2 and SiC grains refined the grains of B 4 C due to the pinning effect, which enhanced the strength. The special (TiB 2 ‐SiC) agglomerates and the existing toughening phenomena such as crack deflection, branching, and microcrack regions induced by the mismatch of thermal expansion coefficients, had cumulative effects on improving the fracture toughness.
Source: crossref · Quality: baseline

Research context

Composites

OpenAlex topics: Advanced ceramic materials synthesis · Advanced materials and composites · Aluminum Alloys Composites Properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Metallurgy Northeastern University Shenyang Liaoning PR China

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