cBN-Al2O3 composites in NaCl environment under high pressure and high temperature conditions

被引：4

作者：

Chu, Dongliang ^{[1
]}

Ma, Hongan ^{[1
]}

Wang, Jian ^{[1
]}

Zhang, Zhuangfei ^{[2
]}

Shen, Weixia ^{[2
]}

Jia, Xiaopeng ^{[1
]}

机构：

[1] Jilin Univ, Coll Phys, State Key Lab Superhard Mat, Changchun, Jilin, Peoples R China

[2] Zhengzhou Univ, Sch Phys & Engn, Minist Educ, Key Lab Mat Phys, Zhengzhou, Henan, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2019年 / 45卷 / 14期

基金：

中国国家自然科学基金;

关键词：

cBN-Al2O3; composites; NaCl environment; HPHT; Thermogravimetric analysis; Vickers hardness; CBN; AL;

D O I：

10.1016/j.ceramint.2019.05.215

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A series of experiments of cubic boron nitride (cBN)-Al2O3 composites was conducted in NaCl environment under a pressure of 5 GPa at 1200-1650 degrees C using a Chinese multi-anvil high-pressure apparatus. The oxidation resistance of cBN-Al2O3 composites reached 1300 degrees C, which was 200 degrees C higher than that of raw cBN powder. The porosity was estimated by the content of NaCl impurities in cBN-Al2O3 composites. The content of NaCl impurity increases with increasing temperature and decreases with increasing Al2O3 level under high pressure and high temperature conditions. cBN + 30 vol% Al2O3 sintered at 5 GPa and 1200 degrees C shows no NaCl impurity, and the Vickers hardness of the sample is 21.6 GPa which is half of cBN +10 vol% Al.

引用

页码：16792 / 16796

页数：5

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