TiC涂层碳纤维的熔盐反应制备及其氧化性能

Preparation and Oxidation Behaviour of TiC Coating on Carbon Fibers by Molten Salts Reaction Method

采用熔盐反应法在碳纤维表面合成了TiC涂层,研究了涂层制备工艺对涂层厚度、形貌以及碳纤维抗氧化性能的影响。结果表明,碳纤维表面涂覆TiC涂层可以改善其抗氧化性能,使碳纤维的起始氧化失重温度从450℃上升至700℃左右。在850℃下保温1～5h合成的TiC涂层与碳纤维基体结合较好,碳纤维抗氧化性能随保温时间的增加而增加;在950℃下保温0.5～5h合成的TiC涂层碳纤维其抗氧化性能随保温时间的增加先增加后下降。

The TiC coating was synthesized on the carbon fibers by molten salts reaction method. The influence of coating synthesis process on the thickness, morphology and the oxidation resistance of the carbon fibers was studied. The results show that the oxidation resistance of the carbon fibers can be improved by coating. After coating with a thin TiC film, the initial weight loss temperature of the carbon fibers increased from 450℃ to 700℃. The TiC coating synthesized at 850℃ for 1 - 5 h adhered well to the carbon fiber matrix, and the oxidation resistance of the carbon fibers increased with the rise of holding time. But for TiC coated carbon fibers prepared at 950℃ for 0.5 - 5 h, the oxidation resistance of the carbon fibers increased firstly and then decreased with the increase of holding time.