Nano Archive

Oxidation Behavior of AlN/h-BN Nano Composites at High Temperature

Jin, Haiyun and Huang, Yinmao and Feng, Dawei and He, Bo and Yang, Jianfeng (2011) Oxidation Behavior of AlN/h-BN Nano Composites at High Temperature. IOP Conference Series: Materials Science and Engineering, 18 (20). p. 202022.

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Official URL: http://stacks.iop.org/1757-899X/18/i=20/a=202022

Abstract

Both AlN/ nano h-BN composites and AlN/ micro h-BN composites were fabricated. The high temperature oxidation behaviors were investigated at 1000°C and 1300°C using a cycle-oxidation method. The results showed that there were little changes of both nano composites and monolithic AlN ceramic at temperature of 1000°C. And at 1300°C, the oxidation dynamics curve of composites could be divided into two courses: a slowly weight increase and a rapid weight decrease, but the oxidation behavior of nano composites was better than micro composites. It was due to that the uniform distribution of oxidation production (Al 18 B 4 O 33 ) surround the AlN grains in nano composites and the oxidation proceeding was retarded. The XRD analysis and SEM observations showed that there was no BN remained in the composites surface after 1300°C oxidation and the micropores remain due to the vaporizing of B 2 O 3 oxidized by BN.

Item Type:Article
ID Code:11120
Deposited By:Prof. Alexey Ivanov
Deposited On:01 Nov 2011 23:22
Last Modified:02 Nov 2011 00:47

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