ZrC改性C/C复合材料的抗氧化涂层研究

Study on Oxidation Resistant Coatings for ZrC Modified C/C Composites

为了提高C/C复合材料的高温抗氧化性能,采用含锆有机溶剂实现了对C/C复合材料的ZrC改性,通过粉末包埋法在其表面制备了SiC过渡层,通过溶胶凝胶法制备了外部的复合陶瓷氧阻挡层。设计三因素三水平的正交试验,研究了ZrC改性增重、过渡层厚度和氧阻挡层厚度三个主要因素对C/C复合材料高温抗氧化性能的影响。9个样品在1600℃马弗炉中进行了30 min的静态氧化测试,结果表明,ZrC改性增重5%、过渡层厚度为60μm和氧阻挡层厚度为80μm的样品抗氧化性能最好,质量损失率仅约5.51%。

In order to improve the oxidation resistance of C/C composites at high temperatures,C/C composites were modified with ZrC by using a Zr-containing organic solvent.Afterwards,a SiC transition layer was prepared on its surface by pack cementation,and an external oxygen barrier layer composed of composite ceramics was prepared by the sol-gel method.Orthogonal experiments with three factors and three levels were designed to study the effects of the weight gain of ZrC modification,the thickness of the transition layer and the thickness of the oxygen barrier layer on the high temperature oxidation resistance of C/C composites.Nine samples were subjected to a static oxidation test,being exposed to air in a muffle furnace for 30 min at 1600℃.The results showed that the sample with 5%ZrC modified weight gain of C/C composites,60μm of the transition layer thickness,and 80μm of the oxygen barrier layer thickness had the best oxidation resistant performance with the mass loss rate of only about 5.51%.