CNTs-SiC/Al2O3-TiO2复合涂层的制备及其性能

doi:10.3724/SP.J.1077.2011.01187

无机材料学报 ›› 2011, Vol. 26 ›› Issue (11): 1187-1192.DOI: 10.3724/SP.J.1077.2011.01187

CNTs-SiC/Al₂O₃-TiO₂复合涂层的制备及其性能

刘顾¹, 汪刘应^1,2, 陈桂明¹, 魏皖宁¹, 华绍春¹, 朱二雷¹

(1. 第二炮兵工程学院五系, 西安 7100251; 2. 西安交通大学电信学院, 西安 710049)

收稿日期:2010-12-28 修回日期:2011-02-25 出版日期:2011-11-20 网络出版日期:2011-11-11
作者简介:刘顾(1982-), 男, 博士研究生. E-mail: liugu5032@163.com
基金资助:
国家自然科学基金(50845039)

Preparation and Properties of SiC-CNTs/Al₂O₃-TiO₂ Coating

LIU Gu¹, WANG Liu-Ying^{1, 2}, CHEN Gui-Ming¹, WEI Wan-Ning¹, HUA Shao-Chun¹, ZHU Er-Lei¹

(1. The Second Artillery Engineering College, Xi’an 710025, China; 2. Key Laboratory of Electronic Ceramics and Devices of Ministry of Education, Xi’an Jiaotong University, Xi’an 710049, China)

Received:2010-12-28 Revised:2011-02-25 Published:2011-11-20 Online:2011-11-11
Supported by:
National Natural Science Foundation of China (50845039)

摘要/Abstract

摘要： 采用微弧等离子喷涂技术制备了CNTs-SiC/Al₂O₃-TiO₂复合涂层, 借助SEM、X射线衍射、仪热分析仪和网络分析仪对CNTs-SiC/Al₂O₃-TiO₂涂层的组织结构、高温氧化性能、电磁特性进行了测试分析. 结果表明: 多功能微弧等离子喷涂枪内中心轴向送粉方式制备的CNTs-SiC/Al₂O₃-TiO₂复合涂层的组织结构致密、孔隙率低, SiC和CNTs的物相也保留下来. CNTs-SiC/Al₂O₃-TiO₂涂层的高温氧化性能有所提高, 涂层在35~700℃升温阶段失重率为0.71wt%, 700℃恒温氧化60min后失重率为0.41wt%. 随着频率的增加, CNTs-SiC/Al₂O₃-TiO₂复合粉末的介电常数的实部从17.3下降到10.3, 而虚部在6.3~2.9之间, 具有频散效应. 制备的CNTs-SiC/Al₂O₃-TiO₂复合涂层在一定的范围内随着涂层厚度的增加, 吸波能力显著提高, 其谐振频率不断向低频移动.

关键词: 微弧等离子喷涂, 组织结构, 高温氧化, 电磁特性

Abstract: CNTs-SiC/Al₂O₃-TiO₂ coatings were prepared by micro-plasma spraying. Microstructure, high temperature oxidation resistance, complex permittivity and absorbing performance of CNTs-SiC/Al₂O₃-TiO₂ coatings were studied. The coatings were density, low porosity. Little oxidation occurred during the spraying process. The phase of β-SiC and C were successfully retained during the plasma spraying process. The high temperature oxidation of CNTs-SiC/Al₂O₃-TiO₂ composite coating is improved compared with that of CNTs. The initial weight loss temperature of CNTs-SiC/Al₂O₃-TiO₂ composite coating is raised to 511℃. The weight loss of the sample heated from 35℃ to 700℃ is 0.71 wt%, while the weight loss of the sample held for 60 min at 700℃ is 0.41wt%. The real parts of complex permittivity of the CNTs-SiC/Al₂O₃-TiO₂ composites decrease from 17.3 to 10.3 with the increasing frequency. And with increasing frequency, the real parts of complex permittivity of the composites decrease from 6.3 to 2.9. This tendency is beneficial for the absorption of the microwave with wide frequency band. The CNTs-SiC/Al₂O₃-TiO₂ coatings have ability of absorbing microwave. The microwave absorbing performance of the coating with thickness of 0.9 mm is pure. However, with the increase of the coating thickness, the microwave absorption properties were enhanced and the minimum reflection loss shifts to low frequency with the increase of the coating thickness.

Key words: micro-plasma spraying, microstructure, high temperature oxidation, electromagnetic property

中图分类号:

TG332

刘顾, 汪刘应, 陈桂明, 魏皖宁, 华绍春, 朱二雷. CNTs-SiC/Al₂O₃-TiO₂复合涂层的制备及其性能[J]. 无机材料学报, 2011, 26(11): 1187-1192.

LIU Gu, WANG Liu-Ying, CHEN Gui-Ming, WEI Wan-Ning, HUA Shao-Chun, ZHU Er-Lei. Preparation and Properties of SiC-CNTs/Al₂O₃-TiO₂ Coating[J]. Journal of Inorganic Materials, 2011, 26(11): 1187-1192.

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CNTs-SiC/Al₂O₃-TiO₂复合涂层的制备及其性能

Preparation and Properties of SiC-CNTs/Al₂O₃-TiO₂ Coating

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