Secrets of high thermal emission of transition metal disilicides TMSi_(2)(TM=Ta,Mo)

作     者：Huimin Xiang Fuzhi Dai Yanchun Zhou Huimin Xiang;Fuzhi Dai;Yanchun Zhou

作者机构：Science and Technology on Advanced Functional Composite LaboratoryAerospace Research Institute of Materials and Processing TechnologyBeijing 100076China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2021年第89卷第30期

页      面：114-121页

核心收录：

学科分类：08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China under Grant Nos.51972089 and 51672064 

主　　题：Disilicide Optical properties Thermal emission First-principles calculations Drude model 

摘      要：TMSi_(2)(TM=Ta,Mo)are extensively used as thermal emissivity agents in high emission coatings due to their well-knownhighemissivity in infrared ***,there is a paucity of the high temperature(HT)emissivity property of these two ***,room temperature(RT)spectrometer measurements have demonstrated that the emittance in infrared range of two silicides was considerably ***,providing critical HT data and satisfactory elucidation on the emission incompatibility of TMSi_(2)is eagerly *** this contribution,combining first principles calculations and Drude model,the reflectance spectra of TMSi_(2)were predicted at both RT and *** with spectrometer measurements,the intrinsic emittance of silicides was relatively low in the entire investigated *** explain the incompatible emission behavior,two simplified models including the majority of high emissivity coating,SiO_(2),were ***,with SiO_(2)considered in simulations,no matter covered on the surface or blended in the composites,the emittance of the TMSi_(2)enhanced *** theoretical results demonstrate the non-negligible significance of oxides on the high temperature performance of silicides and provide the guidelines for improving the emission performance of silicides and searching for potential high emissivity agents.