New approach to evaluate the influence of compressive stress on the oxidation of non-oxide ceramics

作者：Yang, Yakun; Wang, Enhui^*; Fang, Zhi; Guo, Yingshuai; Yang, Tao; He, Zhijun; Hou, Xinmei^*

来源：Ceramics International, 2022, 48(2): 2317-2322.

DOI：10.1016/j.ceramint.2021.10.010

• Non-oxide ceramics
• Oxidation
• Compressive stress
• Kinetic model

The oxidation process of non-oxide ceramics (NOCs) is accompanied with the formation of the compressive stress generated within the oxide film, which in turn affects the oxidation behavior. To shed light on the influence of the compressive stress, a modified model combining the stress equilibrium equation and RPP model has been herein proposed. This modified model can not only quantify the effect of stress evolution on the oxidation process but also accurately describe the relationship between oxidation fraction and other factors including time and temperature, etc. The comparison between experimental data and theoretical calculations for the oxidation of different NOCs verifies the validity of the modified model. It is predictable that this modified model can be applied to treat the oxidation behavior of different NOCs with the consideration of compressive stress.

• 单位
  北京科技大学