以 Co-Ni、Co-Ni-Fe、Co-Ni-RE、Co-Ni-Cr 合金和 AlCoCrFeNi 合金为黏结相制备了Ti(C,N)基金属陶瓷,研究了这五种金属陶瓷在1100℃静态空气中的氧化行为,分析了黏结相对其高温氧化行为的影响。结果表明：以前四种合金为黏结相的金属陶瓷的氧化动力学曲线均基本符合扩散过程控制的抛物线规律,且氧化速率常数都是分阶段变化的；以多主元 AlCoCrFeNi 高熵合金为黏结相则大大提高了Ti(C,N)基金属陶瓷的抗高温氧化性能,这主要归因于黏结相组元中铝元素的活性较强,易于形成较稳定、氧化层致密的,从而使得氧的传输被极大地抑制。
Five kinds of Ti(C,N)-based cermets were prepared by taking Co-Ni,Co-Ni-Fe,Co-Ni-RE,Co-Ni-Cr and AlCoCeFeNi alloys as binders,and then the oxidation behavior of the five kinds of Ti (C,N)-based cermets with different binders at 1 100 ℃ in static air was studied,and then the effect of binders on high-temperature oxidation behavior was analyzed.The results show that the oxidation kinetics curves of four Ti(C,N)-based cermets which use the first four alloys as binder followed a parabolic-like law,and their oxidation rate constants changed by stages.The addition of multi-component AlCoCrFeNi high-entropy alloy increased the high-temperature oxidation resistance of Ti(C,N)-based cermet,because the activity of Al element was relatively strong and easy to form a steady and dense oxide scale,which is effective to impede the oxygen transport.
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