Selection principle of the synthetic route for fabrication of HfB 2  and HfB 2 ‐SiC ceramics | Zendy

Zhu QiQi | Zendy; Zhang Yan | Zendy; Guo WeiMing | Zendy; Sun ShiKuan | Zendy; Lin HuaTay | Zendy

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Selection principle of the synthetic route for fabrication of HfB 2 and HfB 2 ‐SiC ceramics

Author(s) -

Zhu QiQi,

Zhang Yan,

Guo WeiMing,

Sun ShiKuan,

Lin HuaTay

Publication year - 2019

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.16627

Subject(s) - carbothermic reaction , ceramic , microstructure , materials science , fracture toughness , fabrication , vickers hardness test , composite material , carbide , medicine , alternative medicine , pathology

Densification, microstructure, and mechanical properties of spark plasma sintered HfB 2 and HfB 2 ‐SiC ceramics using HfB 2 powders from borothermal reduction and boro/carbothermal reduction were investigated and compared. It was found that HfB 2 ceramics obtained by boro/carbothermal reduction exhibited a significantly higher sinterability compared to that by borothermal reduction. Inversely, HfB 2 ‐SiC ceramics obtained by borothermal reduction exhibited a refined microstructure and better mechanical properties (Vickers hardness: 23.60 ± 2.43 GPa; fracture toughness: 5.89 ± 0.30 MPa.m 1/2 ) than that by boro/carbothermal reduction. These results indicated that optimal fabrication of HfB 2 ‐based ceramics could be achieved by the selection of synthetic route of HfB 2 powders.

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