关键词: 抗氧化性能;表观特征;氧化增重率;MgAlON复合材料

Abstract: Experimental material are fused magnesia-alumina spinel, high purity fused magnesite, light burned bauxite in dengfeng and a small amount of sintering aids.Mixed raw materials evenly, pressed into strips, put the samples in the high temperature nitriding furnace.Selected two series of test antioxidation experiment samples, one series were powder samples, the other series were block samples.Measured the oxidation weight gain rate, TG-DTA curves, the apparent characteristics of the oxidized samples and the physical properties of the samples before and after oxidation.The results show that prepared by the same process conditions the oxidation resistance of MgAlON composite spinel composite is better than that of MgAlON combined with MgO composite.With the same aggregate, the oxidation resistance of the composite materials, bauxite based MgAlON composite is better than alumina based MgAlON composite, after isothermal oxidation, the mechanical properties at room temperature of MgAlON composites are not significantly decreased.

Key words: oxidation resistance;apparent characteristic;oxidation weight gain rate;MgAlON composite