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Theoretical and experimental investigations of mechanical properties for polymorphous YTaO 4 ceramics
Author(s) -
Wu Peng,
Zhou Yunxuan,
Wu Fushuo,
Hu Mingyu,
Chong Xiaoyu,
Feng Jing
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.16629
Subject(s) - spark plasma sintering , materials science , monoclinic crystal system , ceramic , phase (matter) , tempering , composite material , elastic modulus , nanoindentation , crystal structure , sintering , crystallography , chemistry , organic chemistry
Abstract In this work, the dense bulk polymorphous YTaO 4 ceramics with M or M' phase are synthesized by spark plasma sintering method accompanying with different tempering procedures. Combined with the nano‐indentation and theoretical calculation, their mechanical properties are systematically investigated. The identification of crystal structure reveals that the YTaO 4 crystallizes into M phase (space group: I 2 /a ) with higher tempering temperature, otherwise it crystallizes into M' phase (space group: P 2 /a ). The results of mechanical properties indicate M‐phase YTaO 4 possesses larger Young's modulus and hardness than that of M' phase. It is stemmed from the chemical bonding strength of M phase is stronger than that of M' phase, and the stronger bonding strength of M phase also results in its elastic resilience is superior to M' phase. Besides, on account of the low symmetry of monoclinic crystal system, the Young's modulus of polymorphous YTaO 4 ceramics exhibit strong anisotropy.