【摘要】 用热等静压方法制备了（Ｎｂ，Ｔｉ）Ｃ－Ｎｉ金属陶瓷并作了８５０℃，９００℃，１０００℃及１１００℃下的等温氧化和室温～１１００℃的不等温氧化试验。在高温下，该金属陶瓷的表面被氧化成ＴｉＯ＿２，ＮｉＯ，ＮｉＴｉ＿３。认为Ｏ＿２通过氧化层向反应界面的扩散是控制氧化速率的主要步骤。氧化增重遵循抛物线规律，其激活能约为２３４ｋＪ／ｍｏｌ。更多还原

【Abstract】 Nb, Ti)C-Ni cermet was prepared via hot-isostatic-pressing（HIP）.Isothermic oxidation testsfor the cermet at 850℃, 900℃,1000℃and 1100℃ for up to 8h and the nonisothermic oxidation were per-formed.The surface of the cerrnet was oxidized as TiO₂, NiO, NiTiO₃ at high temperature and the scale con-sisted of three layers. The diffusion of O₂ through a thick oxidation layer is considered as a main oxidationrate-governing step. The oxidation kinetics follows a parabolic law with an activation energy of 234kJ/mol.更多还原