Influence of hydrothermal treatment temperature on oxidation modification of C/C composites with aluminum phosphates solution by a microwave hydrothermal process
Influence of hydrothermal treatment temperature on oxidation modification of C/C composites with aluminum phosphates solution by a microwave hydrothermal process
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DOI：
10.1016/j.corsci.2010.07.026
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发表时间：
2010-11
影响因子：
8.3
通讯作者：
Cao Li-yun;M. Qun;H. Jianfeng;Y. Xinping
中科院分区：
文献类型：
--
作者：
Cao Li-yun;M. Qun;H. Jianfeng;Y. Xinping
为了提高C/C复合材料的抗低温氧化性能，采用微波水热法制备了磷酸铝改性C/C复合材料。结果表明，改性后的复合材料表面形成了H3 PO 4或HPO 3连续熔凝层，熔凝层中有规则的白色立方Al（PO 3）3晶体。在393 ~ 473 K范围内，改性后复合材料的抗氧化性能随MH温度的升高而提高。在873 K下氧化6 h后，氧化速率基本不变。Al（PO 3）3环状结构的形成有助于提高复合材料的抗氧化性能。
Carbon/carbon (C/C) composites were modified with an aluminum phosphates solution by a novel microwave hydrothermal (MH) process in order to improve their low temperature oxidation resistance. Results show that a H3PO4or HPO3continuous molten layer with some regular, white cubic Al(PO3)3crystallites are obtained on the surface of the modified composites. The anti-oxidation property of the composites after modification improves with the increase of the MH temperature from 393 to 473K. The oxidation rate is almost constant after oxidation at 873K for 6h. The formation of annular structure of Al(PO3)3is helpful to improve the oxidation resistance of the composites.