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研究了液相法制备Ｃ／Ｃ复合材料的Ｓｉ－Ｗ涂层及其在氧化试验中晶粒长大的过程实验结果表明：在涂层制备过程中，有液态Ｓｉ参与的Ｓｉ和Ｗ的液－固反应在生成ＷＳｉ２的同时，在被－固界面张力的作用下，ＷＳｉ２晶粒迅速靠近；在涂层氧化过程中，在ＷＳｉ２晶体界面能和液－固界面张力的联合作用下，ＷＳｉ２晶粒通过溶解－沉淀的方式发生异常长大．进一步的观察表明，涂层中的晶粒长大能提高涂层的防氧化性能．
The liquid-phase method for preparing Si-W coatings of C / C composites and the process of grain growth in the oxidation test were studied. The experimental results show that during the preparation of the coatings, Si and W with liquid Si - solid reaction in the formation of WSi2 at the same time, was - solid interface tension under the action of WSi2 grain near the rapid; in the coating oxidation process, WSi2 crystal interface and liquid - solid interface tension under the combined action of WSi2 crystal The grains grow abnormally by dissolution-precipitation. Further observations show that grain growth in the coating improves the oxidation resistance of the coating.