Journal
CERAMICS INTERNATIONAL
Volume 48, Issue 9, Pages 12006-12013Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2022.01.058
Keywords
B4C-based composites; Mechanical properties; Spark plasma sintering; Ti3SiC2+Si
Categories
Funding
- National Key Research and Development Project [2019YFC0311800]
- Youth Innovation Promotion Association, CAS
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B4C-based composites were synthesized by spark plasma sintering and the effects of sintering temperature and second phase content on mechanical performance and microstructure were studied. The study found that high-density composites can be obtained at a low sintering temperature, and the composite with 10 wt% (TiB2+SiC) showed excellent mechanical properties.
B4C-based composites were synthesized by spark plasma sintering using B4C?Ti3SiC2?Si as starting materials. The effects of sintering temperature and second phase content on mechanical performance and microstructure of composites were studied. Full dense B4C-based composites were obtained at a low sintering temperature of 1800 C. The B4C-based composite with 10 wt% (TiB2+SiC) shows excellent mechanical properties: the Vickers hardness, fracture toughness, and flexural strength are 33 GPa, 8 MPa m(1/2), 569 MPa, respectively. High hardness and flexural strength were attributed to the high relative density and grain refinement, the high fracture toughness was owing to the crack deflection and uniform distribution of the second phase.
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