AC-HVAF喷涂铁基非晶复合涂层结晶度的DSC法测定  

DSC measurement of the crystallinity of iron-based amorphous alloy coatings by AC-HVAF spraying

作　　者：祝军[1] 樊自拴[1] 孙冬柏[1] 俞宏英[1] 孟惠民[1] 王旭东[1] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083

出　　处：《北京科技大学学报》2007年第11期1123-1127,共5页Journal of University of Science and Technology Beijing

基　　金：国家863计划资助项目(No2002AA331080)

摘　　要：利用活性燃烧高速燃气喷涂方法(AC-HVAF)制备出一种高非晶含量的Fe基非晶合金涂层.根据非晶合金相变的热力学原理可知部分晶化的非晶合金的晶化即为残留非晶相的转变,其相变热应正比于残留非晶相的相含量.采用不同的热处理工艺使喷涂的非晶涂层晶化,利用DSC分析法测定了热处理后涂层中的纳米晶体含量和部分晶化非晶合金涂层试样的相变热,计算了该涂层试样的结晶度.实验结果和理论预测基本相符.A high amorphous content Fe-based amorphous coating was prepared by the activated combustion high-velocity air-fuel （AC-HVAF） spraying method. According to the thermodynamic transformation theory of amorphous alloys, the crystallization of the fractional crystallized amorphous alloy is the transformation of residual amorphous phase, and its transformation enthalpy should be proportional to the phase content of residual amorphous phase. The coating was crystallized by different heat treatment methods. The nanocrystal content in the heated treating coatings and the fractional transformation enthalpy were measured by DSC analysis. The crystallization of the coating was detected. The experimental result basically matched with the data of theoretic forecasting.

关 键 词：非晶涂层 活性燃烧高速燃气喷涂 结晶 DSC分析 

分 类 号：TG174.442[金属学及工艺—金属表面处理]