Selective laser sintering mechanism of polymer-coated molybdenum powder

作     者：白培康 王文峰 

作者机构：School of Materials Science and Engineering No rth University of China 

出 版 物：《中国有色金属学会会刊：英文版》 (Transactions of Nonferrous Metals Society of China)

年 卷 期：2007年第17卷第3期

页      面：543-547页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Project(50675210) supported by the National Natural Science Foundation of China Project(03022) supported by the Key Science Research Program of Education Ministry of China Project(200410250) supported by the Youth Science Foundation of Shanxi Province, China 

主　　题：激光烧结 聚合体 钼元素 溶解方法 

摘      要：A type of polymer-coated molybdenum powder used in selective laser sintering technology was prepared by coating polymer on molybdenum particles and frozen grinding techniques, with the maximum particle diameter of 71 μm. The laser sintering experiments of polymer-coated molybdenum powder were conducted by using the self-developed selective laser sintering machine (HLRP-350I). The method of microscopic analysis was used to investigate the dynamic laser sintering process of polymer-coated molybdenum powder. Based on the study, the laser sintering mechanisms of polymer-coated molybdenum powder were presented. It is found that the mechanism is viscous flow when the laser sintering temperature is between 100 ℃ and 160 ℃, which can be described by a two-sphere model; and the mechanism is melting /solidification when the temperature is above 160 ℃.