利用电弧离子镀技术,在炮钢表面沉积TiAlN和 TiAlYN 两种薄膜,研究添加1％(原子分数)Y对(Ti,Al)N薄膜氧化性能的影响。两种沉积薄膜的样品在空气中850℃下氧化10 h,用 SEM、EDAX和XRD分别分析两种薄膜的形貌、成分及相组成。结果表明,在空气中850℃下氧化10 h 后,两种薄膜的氧化产物均为 Al2 O3和 TiO2的混合氧化物；TiAlN 薄膜的动力学曲线呈近似直线规律,而TiAlYN薄膜动力学曲线符合抛物线规律；前者表面氧化物晶粒粗大,而后者表面氧化物晶粒细小,且氧化膜厚度不足前者的一半；添加 Y 可以减少膜层表面液滴的数量,提高膜层的抗氧化性能。
Two films,TiAlN and TiAlYN,were prepared on the gun steel substrate by means of arc ion plating and the influence of 1 at% Y addition was investigated for the oxidation performance.The scanning electronic microscope (SEM),energy dispersive X-ray analysis (EDAX)and X-ray diffraction (XRD)were employed to analyze the morphologies,composition and phases,respectively,after both coated specimens were oxidized at 850 ℃ for 10 h in air.The results indicated that the mixture of Al2 O3 and TiO2 formed on both films at 850 ℃after 10 h in air.The kinetics curve of TiAlN showed approximate straight line law while the one of TiAlYN a-greed with the parabolic law.Moreover,the grains of the oxide were coarse for the former whilst fine for the latter.Furthermore,the thickness of the oxide scale of the latter was less than the half of the thickness of the former.The addition of Y could reduce the quantity of droplets and increase the performance of oxidation resist-ance.
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