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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

反应温度对水热改性炭/炭复合材料抗氧化性能的影响

王妮娜, 黄剑锋, 曹丽云, 吴建鹏   

  1. (教育部轻化工助剂化学与技术重点实验室, 陕西科技大学, 西安 710021)
  • 收稿日期:2009-01-14 修回日期:2009-03-02 出版日期:2009-09-20 网络出版日期:2009-09-20

Influence of Temperature on Oxidation Resistance of Carbon/Carbon
Composites Modified by a Hydrothermal Treatment

WANG Ni-Na, HUANG Jian-Feng, CAO Li-Yun, WU Jian-Peng   

  1. (Key Laboratory of Auxiliary Chemistry & Technology for Light Chemical Industry, Ministry of Education, Shaanxi University of Science & Technology, Xi’an 710021, China)
  • Received:2009-01-14 Revised:2009-03-02 Published:2009-09-20 Online:2009-09-20

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被引次数

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摘要： 以磷酸、B4C、SiC和Al2O3粉料为原料, 采用一种新颖的水热法对炭/炭(C/C)复合材料基体进行了抗氧化改性. 重点研究了水热反应温度对改性试样的物相组成、微观结构及抗氧化性能的影响. 采用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、能量色散谱仪(EDS)及X射线光电子能谱(XPS)对改性后试样进行了表征. 结果表明：经过水热改性处理, 炭/炭复合材料表面缺陷被玻璃相B2O3、HPO3和微晶Al(PO3)3所组成的涂层所覆盖, 材料的抗氧化性能明显提高; 抗氧化性能在120～200℃范围内随着水热改性温度的升高而提高; 在200℃水热改性后的炭/炭复合材料在700℃的空气中氧化10h后的质量损失仅为2.31%.

关键词: 炭/炭复合材料, 氧化, 水热法, 基体改性

Abstract: Carbon/carbon (C/C) composites are one of the most important high temperature structure materials; Which are oxidized remarkably above 400℃ in oxidative atmosphere. In order to improve the oxidation resistance of C/C composites, suspension mixtures prepared by mixing B4C, SiC and Al2O3 powders and phosphoric acid solution were used as precursors to modify the C/C composites by a novel hydrothermal treatment. The influences of the hydrothermal treatment temperature on the phase, microstructure and antioxidation property of the as-modified composites were investigated. The asmodified C/C composites were characterized by X-ray diffraction, scanning electron microscope (SEM), energy dispersive spectroscope (PDS) and X-ray photoelectron spectroscopy (XPS) techniques. Results show that the surface of the C/C composites is covered by a coating composed of molten B2O3, HPO3 and microcrystalline Al(PO3)3 after modified by the hydrothermal treatment, and their oxidation resistance is effectively improved in the temperature range from 120℃ to 200℃. The anti-oxidation property of the treated C/C composites is improved with increasing hydrothermal treatment temperature. The mass of the modified C/C composites losses only 2.31% after oxidized at 700℃ in air for 10h.

Key words: carbon/carbon composites, oxidation, hydrothermal, matrix modification

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