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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摘要采用电极感应气雾化法(electrode induced gas atomization, EIGA)制备Y₂O₃增强Ti-6Al-4V(TC4合金)复合粉末。测定粉末的流动性和松装密度,并通过光学显微镜和扫描电镜观察Y₂O₃的形态与分布,利用X射线衍射仪和等离子体发射光谱仪分析Y₂O₃/TC4复合粉末的物相及元素组成。结果表明,采用EIGA法制备的Y₂O₃/TC4复合粉末球形度良好,存在少量非球形粉,表面黏附有卫星粉和Y₂O₃颗粒。复合粉末的流动性较差,为33.9~45.6 s/50 g,受Y₂O₃的原始粒度影响较大;粉末的松装密度主要受Y₂O₃含量(w(Y₂O₃),下同)影响,随Y₂O₃含量增加而增大。Y₂O₃均匀分布于TC4基体中,与基体的结合界面光滑、平整,基本保持原有形态和尺寸。Y₂O₃易团聚,其微观形态主要受原始粒度影响。大尺寸的Y₂O₃/TC4复合粉末中Y₂O₃呈环状分布,小尺寸粉末中Y₂O₃颗粒较少,分布均匀。

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	刘联平
	陈仕奇

关键词 ：电极感应, 气雾化, 复合粉末, Y₂O₃, TC4, 分布形态

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

收稿日期: 2020-09-07 出版日期: 2021-01-18

ZTFLH:

TG146.2⁺3

通讯作者: 陈仕奇,副教授。电话：13974870532;E-mail: chenpm450@163.com

引用本文:

刘联平, 陈仕奇. 电极感应气雾化法制备Y₂O₃增强Ti-6Al-4V复合粉末的性能[J]. 粉末冶金材料科学与工程, 2020, 25(6): 449-457.
LIU Lianping, CHEN Shiqi. Characterization of Y₂O₃ reinforced Ti-6Al-4V composite powder prepared by electrode induced gas atomization. Materials Science and Engineering of Powder Metallurgy, 2020, 25(6): 449-457.

链接本文:

http://pmbjb.csu.edu.cn/CN/ 或 http://pmbjb.csu.edu.cn/CN/Y2020/V25/I6/449

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