The preparation and research of alumina powder by the electrical discharge machining method

被引：0
|
作者：
Song, Z. W. [1 ]
Sun, H. L. [1 ]
Nie, B. X. [1 ]
Yang, Z. J. [1 ]
Lv, Z. [1 ]
机构：
[1] Southwest Jiaotong Univ, Minist Educ, Key Lab Adv Technol Mat, Chengdu 610000, Peoples R China
来源：
MATERIALS RESEARCH INNOVATIONS | 2015年 / 19卷
基金：
中国国家自然科学基金;
关键词：
Electric spark plasma ablation; Ultrafine alumina powder; Granularity; Morphology; Pulse width; Pulse interval;
D O I：
10.1179/1432891715Z.0000000001496
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Ultrafine alumina powder was prepared through the method of electric spark plasma ablation and a study was carried out by means of X-ray diffraction, scanning electron microscopy, energy spectrum analysis and laser particle size analysis. The following conclusions were drawn: the alumina can be prepared by spark, which gives an upper layer powder and lower layer coarse powder. Upper powder is mainly gamma-alumina and alpha-alumina, and a small portion of residual aluminium, and the particle size is a few tenths of a micrometre. Lower coarse powder is mainly two kinds of alpha-alumina and more residual aluminium, having a particle size of several tens of micrometres. Upper powder will be reunited, because of the presence of aluminium hydroxide powder that makes the alumina particles stick together. The thickness of the rod, pulse width and pulse interval may affect particle size.
引用
收藏
页码：S320 / S324
页数：5
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