A new model for thermal conductivity of“continuous matrix/dispersed and separated 3D-particles”type composite materials and its application to WC-M(M=Co,Ag)systems

作     者：Shiyi Wen Yong Du Jing Tan Yuling Liu Peng Zhou Jianzhan Long George Kaptay Shiyi Wen;Yong Du;Jing Tan;Yuling Liu;Peng Zhou;Jianzhan Long;George Kaptay

作者机构：State Key Laboratory of Powder MetallurgyCentral South UniversityChangsha 410083China Hunan Provincial Key Defense Laboratory of High Temperature Wear-Resisting Materials and Preparation TechnologyHunan University of Science and TechnologyXiangtan 411201China State Key Laboratory of Cemented CarbideZhuzhou 412000China University of MiskolcMiskolcEgyetemváros3515Hungary 

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

年 卷 期：2022年第97卷第2期

页      面：123-133页

核心收录：

学科分类：08[工学] 0817[工学-化学工程与技术] 0806[工学-冶金工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0802[工学-机械工程] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：financially supported by the National Natural Science Foundation of China(No.52031017) the National Key R&D Program of China(No.2019YFC1904901) the Special Funds for the Construction of Hunan Innovation Province(No.2019GK2052) supported by nano-Ginop Project GINOP-2.3.2-15-2016-00027 in the framework of the Szechenyi 2020 program supported by the European Union。 

主　　题：Thermal conductivity WC-Co WC-Ag Modeling Cemented carbides Composite materials 

摘      要：In the present work a new thermal conductivity model is developed for two-phase composite materials,which are consisted of a continuous matrix and dispersed 3 D-particles separated from each other by the matrix as a function of grain size and volume ratio of the dispersed particles at different temperatures.The model is applied to reproduce experimental thermal conductivity values of cemented carbide systems WC-Co and WC-Ag.Good agreement was found between measured thermal conductivity data originating from both this work and recent literature and the calculated ones only using semi-empirical parameters for the interfacial thermal resistance(ITR)values at WC/Co,WC/Ag and WC/WC interfaces as a function of temperature.Additionally,the temperature and grain size dependence of the thermal conductivity for WC is established for the first time.The model works well for the case when the matrix(Ag)has a higher thermal conductivity compared to that of the WC particles and also for the case when the matrix(Co)has a lower thermal conductivity compared to that of the WC particles.The new model forms a physically sound basis for further development/materials design of cemented carbides and particlereinforced composite materials.