BAS系微晶玻璃抗氧化涂层的制备与性能

芦玉峰; 周萌; 范成洲; 郑晓慧; 吴剑锋; 堵永国; 肖加余

BAS系微晶玻璃抗氧化涂层的制备与性能

1.
西北核技术研究所, 西安 710024;
2.
国防科技大学航天与材料工程学院, 长沙 410073

基金项目: 国家"863"计划(2004AA32G090)

详细信息

通讯作者:
芦玉峰, 博士, 高级工程师, 主要从事材料与环境的相容性研究及其功能性涂层技术研究 E-mail: luyufeng1974@hotmail.com

中图分类号: TB332; TG171
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出版历程
- 收稿日期: 2010-06-22
- 修回日期: 2010-10-19
- 刊出日期: 2011-06-14

Preparation and properties of BAS glass-ceramics based anti-oxidation coatings

1.
Northwest Institute of Nuclear Technology, Xi'an 710024, China;
2.
College of Aerospace and Materials Engineering, National University of Defense Technology, Changsha 410073, China

摘要

摘要: 利用2层不同软化温度和不同热膨胀系数的BaO-Al₂O₃-SiO₂(BAS)系微晶玻璃, 采用浆料涂覆—浸渍—多层共烧的方法制备了2种双层同组分和1种双层不同组分的C_f/SiC复合材料抗氧化涂层。3种结构的BAS系微晶玻璃涂层完整、无明显缺陷, 涂层与C_f/SiC复合材料的结合状态良好, 有助于提高C_f/SiC复合材料的抗氧化性能。双层不同组分的BAS系微晶玻璃涂层在1200~1350 ℃范围内对提高C_f/SiC复合材料抗氧化性能的作用显著, 失重速率和失重量均明显减小。与未包覆涂层的复合材料相比, 包覆双层不同组分涂层的复合材料经历600次(每次保温10 min)热冲击后的失重降低了1/2~2/3, 保留的强度提高了7~15倍。
- 复合材料 /
- C_f/SiC /
- 抗氧化涂层 /
- 微晶玻璃 /
- 钡长石
Abstract: Two kinds of BaO-Al₂O₃-SiO₂ (BAS) glass-ceramics with different soften points and thermal expansion coefficients were employed to prepare three kinds of gradient coatings for carbon fiber reinforced silicon carbide(C_f/SiC) composite. These coatings were fabricated with slurry deposition combined dipping method and multi-co-firing technology. These BAS glass-ceramics based coatings were integrated and defect-free. The coatings and the composites bind tightly, which can improve the anti-oxidation performance of the coated C_f/SiC composite. All coating systems can protect C_f/SiC composite from oxidation. The graded coatings protect C_f/SiC composite markedly, and the mass loss rate and mass loss of coated composites are reduced greatly within 1200~1350 ℃. Compared with uncoated composite, the mass loss of the coated composite is reduced by 1/2~2/3, and the reminant bending strength is enhanced 7~15 times after 600 thermal shock cycles in the experimental range.
- composites /
- C_f/SiC /
- anti-oxidation coating /
- glass-ceramics /
- celsian

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