期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 39, 期 14, 页码 3988-3999出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2019.06.026
关键词
c-AlPO4; SiC whiskers; Mullite; Sol-gel; Isothermal oxidation
资金
- National Natural Science Foundation of China [51575536]
- Natural Science Foundation of Hunan Province of China [2019JJ50768]
A novel cristobalite aluminum phosphate particle (c-AIPO(4)) modified SiC whisker toughened mullite coating (c-AlPO4-SiCw-mullite) was prepared on SiC coated carbon fiber reinforced SiC composites (C/SiC) by a new sol-gel method combined with air spraying to improve the oxidation resistance of SiCw-mullitecoating. Results show that c-AlPO4-SiCw-mullite coatings with 10 and 20 wt.% of c-AlPO4 exhibited obviously improved oxidation resistance at 1773 K in ambient air for 100 h than SiC mullitecoating. Moreover, the oxidation resistance of cAlPO(4)-SiCw-mullite coatings were rapidly declined when the c-AIP04 in c-AlPO4-SiCw-mullite coating were set to 30 and 40 wt.%. The c-AlPO4-SiCw-mullite coating with 20 wt.% of c-AlPO4 showed most pronounced oxidation resistance, the weight loss rate after the oxidation in ambient air for 210 h was merely 3.00 x 10(-5) g.cm(-2) h(-1). The failure of c-AlPO4-SiCw-mullite coating with 20 wt.% of c-AlPO4 was due to the generation of penetrative micro-cracks and micro-holes in the coating, which cannot be self-healed by the silicate glass layer after long time oxidation at 1773 K.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据