【摘要】 通过扫描电镜、透射电镜及X射线衍射等对Mo-Cu复合粉末的粉末形貌、合金化程度及烧结后合金组织结构进行分析,研究了高能球磨后Mo-Cu材料的显微组织及其与陶瓷热膨胀性能匹配的关系。结果表明,采用高能球磨机械合金化和氢气气氛烧结工艺制备的Mo-Cu复合材料,相对密度在98%以上,在室温至700℃热膨胀系数与陶瓷差值在8%。更多还原

【Abstract】 The morphology and mechanical alloying extent of the molybdenum-copper composite powder and metallurgical structure of the sintered composite were analyzed by means of SEM,TEM and XRD。The microstructure of molybdenum-copper composite prepared by high-energy ball milling processing and the matching relationship of thermal expansion coefficient between the molybdenum-copper composite and the ceramic was studied.The results show that molybdenum-copper composite prepared by the processing of high-energy ball milling and hydrogen sintering has the relative density above 98%,and the D-value of thermal expansion coefficient between the Mo-Cu composite and ceramic is about 8% in the temperature range from room temperature to 700 ℃.更多还原