Study of In Situ Formation of Rod-Like Phases Reinforced Ti-B-C Ceramics

Abstract

Abstract: The rod-like phases TiB₂ were formed by the reaction of B₄C and Ti under 1800℃×35MPa×1h
sintering condition, the length of particle TiB₂ was 10～30μm, some over 40μm; and the aspect ratio was 2～8. These rod-like phases
endowed the composites with high mechanical properties. The bending strength and the fracture toughness of the composites were 680MPa and 12MPa·m^1/2,
respectively. The phases were examined by XRD; the microstructure of the composites was observed by SEM and TEM. The influence of sintering
temperature and Ti content on the growth and development of rod-like phases TiB₂ was discussed.

Key words: in situ formation, rod-like phase TiB₂, microstructure, phase growth, influence factors

CLC Number:

TQ174

LI Shi-Bo,WEN Guang-Wu,ZHANG Bao-Sheng. Study of In Situ Formation of Rod-Like Phases Reinforced Ti-B-C Ceramics[J]. Journal of Inorganic Materials.

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Study of In Situ Formation of Rod-Like Phases Reinforced Ti-B-C Ceramics

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