In situ reaction and solid solution induced hardening in (Ti,Zr)B 2 ‐(Zr,Ti)C composites | Zendy

Huo Sijia | Zendy; Wang Yujin | Zendy; Kong Qingyi | Zendy; Chen Lei | Zendy; Yao Mianyi | Zendy; Gu Hui | Zendy; Ouyang Jiahu | Zendy; Fu Yudong | Zendy; Zhou Yu | Zendy

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In situ reaction and solid solution induced hardening in (Ti,Zr)B 2 ‐(Zr,Ti)C composites

Author(s) -

Huo Sijia,

Wang Yujin,

Kong Qingyi,

Chen Lei,

Yao Mianyi,

Gu Hui,

Ouyang Jiahu,

Fu Yudong,

Zhou Yu

Publication year - 2020

Publication title -

journal of the american ceramic society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.9

H-Index - 196

eISSN - 1551-2916

pISSN - 0002-7820

DOI - 10.1111/jace.17355

Subject(s) - materials science , solid solution strengthening , solid solution , microstructure , fracture toughness , hardening (computing) , composite material , indentation , sintering , composite number , ceramic , hot pressing , zirconium , metallurgy , layer (electronics)

(Ti,Zr)B 2 ‐ (Zr,Ti)C ceramics were synthesized by reactive hot‐pressing and solid solution coupling effect using ZrB 2 and TiC powders as starting materials. Effects of sintering temperature on phase relations, microstructure and mechanical properties were reported. The equimolar ZrB 2 and TiC reactants ensured a complete in situ reaction to form (Ti,Zr)B 2 and (Zr,Ti)C solid solutions. The (Ti,Zr)B 2 ‐ (Zr,Ti)C composite sintered at 1750°C was fully densified, and exhibited a high hardness of 29.1 GPa due to fine‐grain hardening and solid solution hardening. The optimized comprehensive mechanical properties such as a hardness of 27.9 GPa, a strength of 705 MPa and an indentation fracture toughness of 5.3 MPa m 1/2 were achieved in (Ti,Zr)B 2 ‐ (Zr,Ti)C composites sintered at 1800°C for 1 hour.

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