TiB<sub>2</sub>/ZrB<sub>2</sub>-C自生复合材料涂层的制备与表征

杨金华; 刘占军; 王立勇; 郭全贵; 宋进仁; 刘朗

TiB₂/ZrB₂-C自生复合材料涂层的制备与表征

1.
中国科学院山西煤炭化学研究所, 中国科学院炭材料重点实验室, 山西太原 030001;
2.
中国科学院大学, 北京 100049

详细信息

作者简介:
杨金华,博士.E-mail:jhyang@sxicc.ac.cn

通讯作者:
郭全贵,博士,研究员.E-mail:qgguo@sxicc.ac.cn;刘占军,博士,研究员.E-mail:zjliu03@sxicc.ac.cn

中图分类号: TB332
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- 被引次数: 0
出版历程
- 收稿日期: 2016-02-03
- 录用日期: 2016-04-21
- 修回日期: 2016-04-01
- 刊出日期: 2016-04-28

Preparation and characterization of a TiB₂/ZrB₂-C eutectic coating

1.
Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;
2.
University of Chinese Academy of Sciences, Beijing 100049, China

摘要

摘要: 通过加热TiB₂及ZrB₂粉末与等静压炭块至共熔点以上的方法制备出新型炭/陶复合材料涂层TIB、ZRB-1与ZRB-2。结果表明,所制自生复合材料涂层的表层与内部结构明显不同,表层由B掺杂的高度有序石墨构成,内部由TiB₂-C或ZrB₂-ZrC-C合金组成。TIB、ZRB-1与ZRB-2涂层中石墨的d₀₀₂值分别为0.3359、0.3360与0.3354 nm,接近或等于单晶石墨的d₀₀₂值(0.3354 nm),表明高度有序石墨结构的形成。3种涂层内部石墨的拉曼光谱中D峰、D'峰明显,2D峰强度低及G峰向高波数偏移,这些特征是由石墨碳网格结构中B掺杂所致。此外,ZrB₂粒径小有利于涂层表层应力的释放。
- 石墨 /
- 陶瓷 /
- 涂层 /
- 自生复合材料
Abstract: 74μm TiB₂, and 74μm and 1μm ZrB₂ powders were heated with isostatically pressed carbon blocks at 2550℃, which is above the eutectic temperature of TiB₂-C and ZrB₂-C, to form eutectic coatings, which are named TIB, ZRB-1 and ZRB-2, respectively. Results showed that the surface and the inner part of the coatings were different. The surface of the coatings was composed of B-doped highly ordered graphite, and the inner part was composed of TiB₂-C or ZrB₂-C alloy. The d₀₀₂ values of graphite in samples TIB, ZRB-1 and ZRB-2 were 0.3359, 0.3360 and 0.3354 nm, respectively, which are almost the same as that of single crystal graphite(0.3354 nm), indicating the formation of highly ordered graphite. The features of the Raman spectra of these three coatings such as the appearance of D and D' bands, low intensity 2D bands and the shift of G bands to higher wave numbers are ascribed to B-doping in the graphene layers of the graphite. The small particle size of the ZrB₂ powder favored the relaxation of the stress formed inside the surface of the coatings.
- Graphite /
- Ceramic /
- Coating /
- Eutectic

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