通过聚合物前驱体热解方法制备了SiBCN陶瓷,对其在1 200℃空气条件下的抗氧化性能进行了研究,并与前驱体法制得的SiCN陶瓷进行了比较.结果表明,SiBCN陶瓷经氧化10 h后样品氧化增重只有0.35％,并且样品中没有裂纹的出现,表现出良好的抗氧化性能.而同样条件下SiCN陶瓷氧化增重达到3.1％,样品出现裂纹.样品表面元素组成分析表明,SiBCN陶瓷表面氧化物主要以SiO2形式存在,而SiCN陶瓷表面主要以SiOx(x＜2)存在.
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