项目名称: 微波场强化熔渗烧结CuW80合金Cu组元迁移机理研究
项目编号: No.51204081
项目类型: 青年科学基金项目
立项/批准年度: 2013
项目学科: 冶金与矿业学科
项目作者: 许磊
作者单位: 昆明理工大学
项目金额: 25万元
中文摘要: 利用微波烧结金属粉末及合金材料具有烧结温度低、烧结时间短、能源利用率和加热效率高、安全无污染等优点。项目以W-Cu合金作为模型材料,采用微波烧结技术熔渗烧结CuW80合金,测定金属Cu粉和W粉在微波场中高温烧结的介电特性,研究金属颗粒与微波场间耦合机理,以及微波场强化熔渗烧结工艺中微波功率密度、金属粉末粒度、烧结温度和时间、表面趋肤效应、尖端放电等主要因素对材料微观结构、物理机械性能的影响,形成微波熔渗烧结CuW80合金新工艺。研究微波高温烧结CuW80合金过程中Cu组元的熔渗迁移特性,以及对金属W颗粒的包覆特性,形成微波场中金属组元熔渗迁移扩散的调控技术与基础理论,并采用Fluent软件分析模拟微波场中物料烧结温度场分布,丰富微波烧结技术制备CuW80合金理论体系和基础研究,推动微波熔渗烧结在W-Cu电极合金制备领域的技术发展。
中文关键词: 微波烧结;熔渗;W-Cu 合金;组元迁移;介电特性
英文摘要: The use of microwave sintering of metal powder and alloyed materials has many advantages such as: the low sintering temperature, the short period of sintering time, the high efficiency of energy using and heating, the safety and no pollution, etc. The project uses W-Cu alloy materials as a model, and utilizes the microwave sintering technology to infiltration the sintering CuW80 alloy, which can determine the dielectric properties of the high-temperature sintering for metal Cu powder and W powder in the microwave field, and can research the coupling mechanism between the metal particles and the microwave field. Then it will research the effect of microwave power density、metal powder size、sintering temperature and time、skin effect 、point discharge on the material microstructure、mechanical properties in the infiltration sintering process. Finally it will obtain a new process of the microwave sintering infiltration CuW80 alloy. The research for infiltration migration characteristics of the Cu elements and the tungsten particles coated features during the process of microwave high temperature sintering CuW80 alloy, which will form the diffusion of control technology and the basic theory of a metal elements infiltration in the microwave field. At the same time, it will use software of Fluent to analyze the analog tem
英文关键词: microwave sintering;infiltration;tungsten-copper alloy;element transfer;dielectric properties