HIGH-TEMPERATURE OXIDATION OF ZIRCONIUM HYDRIDE POWDERS

被引：13
|
作者：
SHEMET, VZ [1 ]
LAVRENKO, VA [1 ]
TEPLOV, OA [1 ]
RATUSHNAYA, VZ [1 ]
机构：
[1] ACAD SCI KIEV,INST MAT SCI PROBLEMS,KIEV,UKRAINE,USSR
来源：
OXIDATION OF METALS | 1992年 / 38卷 / 1-2期
关键词：
KINETICS; OXIDATION; ZIRCONIUM HYDRIDE;
D O I：
10.1007/BF00665046
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The oxidation kinetics of zirconium-hydride powders were studied in the temperature range of 298-1378 in air at atmospheric pressure. TG, DTA, DSC, x-ray analysis, and scanning electron microscopy were used. The results obtained are in accordance with the proposed pseudo-parabolic model of zirconium-hydride oxidation. This model includes the initial linear mode of oxide growth with oxygen diffusion through a non-solid film of ZrO2 of variable depth and a stationary diffusion process followed by oxide sintering. It has been established that the activation energy of the limiting stage of oxidation (238.3 kJ/mol) coincides with the activation energy of oxygen self-diffusion in monocline ZrO2.
引用
收藏
页码：89 / 98
页数：10
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