共沉降法制备Y<sub>2</sub>O<sub>3</sub>-W连续梯度材料

doi:10.11868/j.issn.1001-4381.2016.001225

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摘要

根据改进的共沉降数学模型，以W颗粒的粒度分布为已知条件，对原始Y₂O₃粉末进行沉降分级和级配。采用共沉降法和热压烧结工艺制备成分分布指数P分别为1.0，0.7，0.3和0.1的4种Y₂O₃-W连续梯度材料。结果表明：通过对分级后Y₂O₃粉末的级配可制备出粒度满足设计要求的Y₂O₃粉体。通过显微组织观察和硬度测试结果，进一步验证了材料梯度层的连续性。

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	王诗阳
	陈磊
	马佩嘉
	王玉金
	傅宇东

关键词 ： Y₂O₃-W, 连续梯度材料, 共沉降模型, 级配

Abstract：

The raw Y₂O₃ powder was classified and graded based on modified co-sedimentation mathematical model, using the size distribution of W particles as the known condition. Y₂O₃-W continuous graded materials with the composition distribution index P values of 1.0, 0.7, 0.3 and 0.1 were prepared by co-sedimentation and hot-pressing. The results show that the Y₂O₃ powder consistent with the design requirements can be obtained by graduation method. The gradient continuity of materials can be verified by microstructure observation and hardness testing.

Key words： Y₂O₃-W continuous graded material co-sedimentation model graduation

收稿日期: 2016-11-16 出版日期: 2017-09-16

中图分类号:

TB331

基金资助:国家自然科学基金资助项目(51621091);国家自然科学基金资助项目(51472060);教育部新世纪人才计划资助项目(NCET-13-0177)

通讯作者: 王玉金 E-mail: wangyuj@hit.edu.cn

作者简介: 王玉金(1974-), 男, 教授, 博士, 从事专业:钨基复合材料、超高温陶瓷材料、复合材料的低温制备及复合材料的热处理等, 联系地址:黑龙江省哈尔滨市南岗区一匡街1号哈尔滨工业大学科学园C3栋516室(150001), E-mail:wangyuj@hit.edu.cn

引用本文:

王诗阳, 陈磊, 马佩嘉, 王玉金, 傅宇东. 共沉降法制备Y₂O₃-W连续梯度材料[J]. 材料工程, 2017, 45(9): 66-71.
Shi-yang WANG, Lei CHEN, Pei-jia MA, Yu-jin WANG, Yu-dong FU. Y₂O₃-W Continuous Graded Materials by Co-sedimentation. Journal of Materials Engineering, 2017, 45(9): 66-71.

链接本文:

http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.001225 或 http://jme.biam.ac.cn/CN/Y2017/V45/I9/66

Fig.1 原始粉末的粒度分布曲线

Table 1 沉降设备参数及相关实验参数

Table 2 不同P值时原料总质量

Fig.2 沉降不同时间得到的Y₂O₃粉末粒径分布曲线

Table 3 不同P值时Y₂O₃粉末的级配比例

Fig.3 不同P值时Y₂O₃粉末粒度分布的设计和级配后实验结果的对比
(a)P=1.0;(b)P=0.7;(c)P=0.3;(d)P=0.1

Fig.4 不同P值时Y₂O₃-W梯度材料的截面显微组织
(a)P=1.0;(b)P=0.7;(c)P=0.3;(d)P=0.1

Fig.5 不同P值时Y₂O₃-W梯度材料的成分分布(1) 及对应的维氏硬度值(2)
(a)P=1.0；(b)P=0.7；(c)P=0.3；(d)P=0.1

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