反应法制备硼化锆耐超高温涂层

doi:10.3724/SP.J.1077.2011.00902

无机材料学报 ›› 2011, Vol. 26 ›› Issue (9): 902-906.DOI: 10.3724/SP.J.1077.2011.00902 CSTR: 32189.14.SP.J.1077.2011.00902

反应法制备硼化锆耐超高温涂层

赵丹, 张长瑞, 张玉娣, 陈思安, 胡海峰

(国防科技大学航天与材料工程学院, CFC国防科技重点实验室, 长沙410073)

收稿日期:2010-11-14 修回日期:2011-01-16 出版日期:2011-09-20 网络出版日期:2011-08-19
作者简介:赵丹(1983-), 女, 博士研究生. E-mail: ownzhao@gmail.com
基金资助:
国家自然科学基金重大研究计划项目(90816020)

Reactive Preparation and Properties of ZrB₂ Coating

ZHAO Dan, ZHANG Chang-Rui, ZHANG Yu-Di, CHEN Si-An, HU Hai-Feng

(Key Laboratory of Advanced Ceramic Fiber & Composites, Nation University of Defense Technology, Changsha 410073, China)

Received:2010-11-14 Revised:2011-01-16 Published:2011-09-20 Online:2011-08-19
Supported by:
National Natural Science Foundation of China(90816020)

摘要/Abstract

摘要： 为了提高C/SiC复合材料的超高温抗烧蚀性能, 以锆粉、硼粉和酚醛树脂为原料, 通过泥浆涂刷后高温烧结的方法在C/SiC表面制备了ZrB2涂层, 研究了涂层的烧结反应过程, 并对其组成、结构和抗烧蚀性能进行了表征. 结果表明: 1200℃前Zr先与碳反应生成ZrC, 然后在1400~1600℃时ZrC与B反应生成ZrB₂. 浆料配比为n(Zr): n(B):n(C)=1.0:1.5:1.0时, 1600℃制备的涂层由ZrB₂、少量的ZrC及ZrO₂组成. 氧乙炔焰烧蚀60s后, 由于ZrB₂氧化形成了ZrO₂熔融层, 涂层后的C/SiC复合材料的线烧蚀率几乎为零, 而未涂层的C/SiC复合材料的线烧蚀率为0.064mm/s.

关键词: 硼化锆, 超高温, 涂层, 抗烧蚀, C/SiC

Abstract: In order to improve the ablation property of C/SiC composite at ultra high temperatures, ZrB₂ coatings upon C/SiC composite were prepared by pasting the slurry of zirconium powder, boron powder and phenolic resin, followed by high temperature sintering. The reactions in the sintering process were investigated, and the component, microstructure and ablation property of the coatings were characterized. The results show that zirconium powder reacts firstly with pyrolytic carbon to form ZrC till 1200℃, and then ZrC reacts with boron to form ZrB₂during 1400℃-1600℃. When the mole ratio of Zr/B/C is 1.0/1.5/1.0, the coating sintered at 1600℃ is composed of mainly ZrB₂, small amount of ZrC and ZrO₂. After ablation for 60 s in oxyacetylene torch environment, the C/SiC composite with ZrB₂ coating shows a linear recession rate of zero, due to the ZrO₂ formation from ZrB₂ oxidation, while the C/SiC composite without coating shows a linear recession ratio of 0.064mm/s.

Key words: ZrB₂, ultra high temperature ceramics, coating, ablation resistance, C/SiC composite

中图分类号:

TG146

赵丹, 张长瑞, 张玉娣, 陈思安, 胡海峰. 反应法制备硼化锆耐超高温涂层[J]. 无机材料学报, 2011, 26(9): 902-906.

ZHAO Dan, ZHANG Chang-Rui, ZHANG Yu-Di, CHEN Si-An, HU Hai-Feng. Reactive Preparation and Properties of ZrB₂ Coating[J]. Journal of Inorganic Materials, 2011, 26(9): 902-906.

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反应法制备硼化锆耐超高温涂层

Reactive Preparation and Properties of ZrB₂ Coating

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反应法制备硼化锆耐超高温涂层

Reactive Preparation and Properties of ZrB2 Coating

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Reactive Preparation and Properties of ZrB₂ Coating