铝化物涂层高温氧化寿命的预测  

High-temperature oxidation lifetime prediction for aluminide coatings in air

作　　者：刘培生[1] 梁开明 顾守仁[2] 

机构地区：[1]北京师范大学材料科学系射线束技术与材料改性教育部重点实验室,北京100875 [2]清华大学材料科学与工程系先进材料教育部重点实验室,北京100084

出　　处：《清华大学学报（自然科学版）》2003年第6期766-768,共3页Journal of Tsinghua University(Science and Technology)

摘　　要：对铝化物涂层高温氧化寿命进行实验检测,是一项十分费时且耗能的工作。该文运用半经验公式预测铝化物涂层高温氧化寿命,既可由较高温度下的短期寿命推算涂层在较低温度下的长期寿命,也可由两种不同温度下的退化程度推算其它温度下任意给定时间的退化程度。以一种新型钴基合金DZ40M的Ti改性铝化物涂层(厚度约为20μm)为对象,利用1100℃和1050℃的有关实验数据,估算了该涂层在给定温度1000℃下的高温氧化寿命,估算值约为1904h。而相应的实测动力学曲线显示的对应值为2000h左右,从而证明了该估算方法的实用性。The oxidation life time of aluminide coatings at high temperatures is difficult to measure experimentally. An semiempirical method was developed to predict the degradation of aluminide coatings during hightemperature oxidation. The longer lifetimes of coatings at lower temperatures could also be predicted based on the shorter lifetimes of coatings at higher temperatures. The formula based on experimental data at 1 100 ℃ and 1 050 ℃ predicted an oxidation lifetime of 1 904 h for a 20 μm thick Timodified aluminide coating on the new Cobased superalloy DZ40M in air at 1 000 ℃. The experimental oxidationkinetic curve predicted a lifetime of approximately 2 000 h which is in good agreement with the calculated result of 1 904 h.

关 键 词：铝化物涂层 高温氧化寿命 半经验公式 寿命预测 退化程度 退化寿命 钴基合金 

分 类 号：TG174.44[金属学及工艺—金属表面处理]