机械球磨Y<sub>2</sub>O<sub>3</sub>粉末的组织结构演变

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Abstract Y₂O₃ was mechanical milled by planetary ball mill and its particle size, morphology and the microstructure evolution were systematically investigated by XRD, SEM and TEM. The results show that raw Y₂O₃ powder has cubic structure, and undergoes crushing, flaky and structure transforming during mechanical milling because of the collision effects of high energy milling balls. Raw Y₂O₃ powder with bimodal distribution is crushed, refined and dispersed completely, and its particle size shows a single peak and lognormal distribution after mechanical milling for 60 h. The cubic structure Y₂O₃ powder was destroyed and formed small scaled lattice defects during mechanical milling. The lattice defects region expands to a composite structure which consist of amorphous and nano-grains, and finally completely transformed into amorphous structure. The Y₂O₃ powders transform to irregular bulk structure and short rod structure after mechanical milling for 60 h. The irregular bulk structure is composite structure which consist of amorphous matrix and a few nano-grains, and the short rod structure is completely amorphous.

Key words： Y₂O₃ powder mechanical milling amorphization structure evolution microstructure

Received: 25 January 2019 Published: 11 July 2019

ZTFLH:	TF122
	TG146

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	LI Quan
	LIU Zuming
	PENG Kai
	ZHAO Fan
	LÜ Xueqian

Cite this article:

LI Quan,LIU Zuming,PENG Kai, et al. Microstructure evolution of Y₂O₃ powder during mechanical milling[J]. Materials Science and Engineering of Powder Metallurgy, 2019, 24(3): 226-231.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2019/V24/I3/226

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