碳化硼的氧化特性研究

Oxidization Characteristics of Boron Carbide

研究了碳化硼在 40 0～ 80 0℃空气中烧结时的氧化特性 ,采用 XRD、SEM对氧化后的碳化硼的相结构和表面形貌进行分析、观察。结果表明 :碳化硼在 6 0 0℃左右开始氧化 ,氧化后部分生成玻璃态的B2 O3,氧化过程为热激活过程 ,激活能 Q=17.17k J/

The oxidization characteristics of boron carbide during sintering at4 0 0～ 80 0℃ in air were investigated.The phase structure and surface morphology of oxidized boron carbide were analyzed and observed using X- ray diffraction and scanning electron microscope,respective- ly. The results show that the oxidation of boron carbide begins at about 60 0℃ ,after oxidization , the boron cabide partially transformed into amorphous boron oxide,the oxidization is a thermally activated process,the activation energy Q =17.17k J/ mol.