The oxidation behaviors of bulk Ti3Si(1-x)AlxC2 prepared by hot pressing were investigated. The results show that the isothermal oxidation behavior of Ti3SiC2 obeys a parabolic law between 900 and 1 100℃and follows a...The oxidation behaviors of bulk Ti3Si(1-x)AlxC2 prepared by hot pressing were investigated. The results show that the isothermal oxidation behavior of Ti3SiC2 obeys a parabolic law between 900 and 1 100℃and follows a two-step parabolic rate law between 1 200℃and 1 300℃. The cyclic oxidation behavior of material is assumed to obey a three-step parabolic rate law at 1 100℃and 1 200℃. The calculated activation energy of isothermal oxidation is 101.43 kJ/mol. The oxide layers which consist of a mass ofα-Al2O3 and little TiO2 and SiO2 are observed on Ti3SiC2 as a dense and adhesive protect scale. The oxidation mechanism varies with the additive aluminum that greatly improves the oxidation resistance of Ti3SiC2.展开更多
基金Project (KF200505) supported by the Key Laboratory of Heavy Ion Physics (Peking University), Ministry of Education
文摘The oxidation behaviors of bulk Ti3Si(1-x)AlxC2 prepared by hot pressing were investigated. The results show that the isothermal oxidation behavior of Ti3SiC2 obeys a parabolic law between 900 and 1 100℃and follows a two-step parabolic rate law between 1 200℃and 1 300℃. The cyclic oxidation behavior of material is assumed to obey a three-step parabolic rate law at 1 100℃and 1 200℃. The calculated activation energy of isothermal oxidation is 101.43 kJ/mol. The oxide layers which consist of a mass ofα-Al2O3 and little TiO2 and SiO2 are observed on Ti3SiC2 as a dense and adhesive protect scale. The oxidation mechanism varies with the additive aluminum that greatly improves the oxidation resistance of Ti3SiC2.
