无机材料学报

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碳化硼的氧化特性研究

吴桢干; 顾明元; 张国定   

  1. 上海交通大学金属基复合材料国家重点实验室; 上海200030
  • 收稿日期:1996-04-29 修回日期:1996-05-20 出版日期:1997-06-20 网络出版日期:1997-06-20

Oxidation Characteristics of Boron Carbide

WU Zhengan; GU Mingyuan; ZHANG Guoding   

  1. The State Keg Laboratory of MMCs; Shanghai Jiao Tong University Shanghai 200030 China
  • Received:1996-04-29 Revised:1996-05-20 Published:1997-06-20 Online:1997-06-20

摘要: 本文研究了碳化硼在400~800℃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600℃左右开始氧化,氧化后部分生成玻璃态的B2O3,氧化过程为热激活过程,激活能Q=17.17kJ/mol.

关键词: 碳化硼, 氧化, 玻璃态, 氧化硼

Abstract: The oxidation characteristics of boron carbide during sintering at 400~800℃ in air wereinvestigated. The phase structure and surface morphology of oxidized boron carbide were analyzedand observed using X-ray diffraction and scanning electron microscope, respectively. The resultsshow that the oxidation of boron carbide begins at about 600℃. After oxidized, the boron carbidepartially transformed into amorphous boron oxide. The oxidization process is a thermally activatedprocess, whose activation energy Q=17.17kJ/mol.

Key words: boron carbide, oxidation, amorphous, boron oxide