Premium
Effect of ZrO 2 whiskers on the microstructure and mechanical properties of a Ti(C,N)‐based cermet cutting tool material
Author(s) -
Fang Yihang,
Zhao Xianrui,
Zhang Mengxian,
Zhang Ping,
Cheng Hu,
Xue Shuangxi,
Zhang Li,
Wu Jianbo,
Feng Shangshen
Publication year - 2019
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.13186
Subject(s) - materials science , whisker , cermet , whiskers , microstructure , flexural strength , composite material , fracture toughness , hot pressing , toughening , toughness , tearing , ceramic
ZrO 2 ‐whisker‐reinforced Ti(C,N)‐based cermets were designed and prepared via a vacuum hot‐pressing process. The ZrO 2 whisker characteristics and the phase, microstructure and mechanical properties of the cermets were investigated, and the relevant toughening mechanisms were examined. The results indicate that the ZrO 2 whiskers retain their morphology and significantly improve the mechanical properties of the cermets. The relative density and hardness decreased slightly with increasing ZrO 2 whisker content. At a whisker content of 7.5 wt.%, the fracture toughness and flexural strength reached their maximum values of 7.825 MPa·m 1/2 and 1094 MPa, respectively. This enhancement in the mechanical properties is due to stronger bonding between the interfaces through dimples, tearing ridges and whisker pull‐out, in addition to the inhibition of crack propagation via crack deflection, crack branching and crack bridging.