A study on the oxidation kinetics and mechanism of three-dimensional (3D) carbon fiber braid coated by gradient SiC

被引：20
|
作者：
Gao, PZ [1 ]
Xiao, HN
Wang, HJ
Jin, ZH
机构：
[1] Hunan Univ, Coll Mat Sci & Engn, Changsha 410082, Peoples R China
[2] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China
来源：
MATERIALS CHEMISTRY AND PHYSICS | 2005年 / 93卷 / 01期
基金：
中国国家自然科学基金;
关键词：
gradient SiC coating; oxidation kinetics and mechanism; TG-DTG; self-catalytic;
D O I：
10.1016/j.matchemphys.2005.03.003
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The oxidation kinetics and mechanism of gradient SiC coating/3D carbon fiber braid (coated braid, CB) in static air were studied through isothermal oxidation-weight loss, non-isothermal thermogravimetric (TG) and differential thermogravimetric (DTG) also. The results showed that the oxidation process of CB in isothermal condition was reaction-controlled in the first step and, gas diffusion and reaction-controlled in the second step. In non-isothermal condition, the characteristic of oxidation process was self-catalytic. The oxidation mechanism was one-dimensional diffusion. The kinetic parameters were: log A (min(-1)) = 10.12 and E-a (kJ mol(-1)) = 224.96. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：164 / 169
页数：6
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