Subsurface oxidation of boron nitride coatings on silicon carbide fibers in SiC/SiC ceramic matrix composites

被引：29
|
作者：
Wing, Bradley L. [1 ,2 ]
Halloran, John W. [1 ]
机构：
[1] Univ Michigan Mat Sci & Engn, 2300 Hayward, Ann Arbor, MI 48109 USA
[2] Rolls Royce HTC, Cypress, CA USA
来源：
CERAMICS INTERNATIONAL | 2018年 / 44卷 / 14期
关键词：
Ceramic matrix composites; Silicon carbide; Boron nitride; Oxidation; DEGRADATION;
D O I：
10.1016/j.ceramint.2018.06.221
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：
In a SiC/SiC ceramic matrix composite, oxygen penetrates through unprotected ends of boron nitride coated silicon carbide fibers by ends-on oxidation in ambient air at 1200-1285 degrees C. For oxidation times and temperatures that cause only a few microns of oxide to form on the matrix, the boron nitride coatings can be oxidized to a depth of several hundred microns. Sub-surface oxide penetration is deeper for thicker coatings.
引用
收藏
页码：17499 / 17505
页数：7
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