电极感应气雾化法制备Y<sub>2</sub>O<sub>3</sub>增强Ti-6Al-4V复合粉末的性能

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Abstract Y₂O₃ reinforced Ti-6Al-4V (TC4 alloy) composite powders were prepared by electrode induced gas atomization (EIGA). The flowability and apparent density of the powders were measured. The morphology and distribution of Y₂O₃ were observed by optical microscope (OM) and scanning election microscope (SEM). The phase and element composition of Y₂O₃/TC4 composite powders were analyzed using X-ray diffraction (XRD) and plasma emission spectrometer (PES). The results show that the Y₂O₃/TC4 composite powders prepared by EIGA have good sphericity with a small amount of non-spherical powders. Satellite powders and Y₂O₃ particles are adhered on the surface. The flowability of the composite powders is poor, ranging from 33.9-45.6 s/50 g, which is greatly affected by Y₂O₃original particle size. The apparent density is mainly affected by the Y₂O₃ content (w(Y₂O₃)), which increases with the increase of Y₂O₃ content. Y₂O₃particles maintain the original shape and size, which are distributed in TC4 matrix uniformly. The interface with matrix is smooth and flat. Y₂O₃ particles are easy to agglomerate, and the micromorphology is mainly influenced by the original particle size. Y₂O₃ with ring distribution are found in large-size composite powders. The Y₂O₃content in small-sized composite powders is less, and the distribution is uniform.

Key words： electrode induction gas atomization composite powder Y₂O₃ TC4 distribution pattern

Received: 07 September 2020 Published: 18 January 2021

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	LIU Lianping
	CHEN Shiqi

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LIU Lianping,CHEN Shiqi. Characterization of Y₂O₃ reinforced Ti-6Al-4V composite powder prepared by electrode induced gas atomization[J]. Materials Science and Engineering of Powder Metallurgy, 2020, 25(6): 449-457.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2020/V25/I6/449

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