机械合金化法制备低质量分数Mo-Cu合金

Preparation of low quality fraction Mo-Cu alloy by mechanical alloying process

采用机械合金化法制粉、液相烧结和致密化处理工艺,制备了低质量分数的Mo-Cu合金。通过X射线衍射和扫描电镜对Mo-Cu复合粉末形貌、液相烧结和变形加工后合金显微组织进行了分析,研究了各种工艺参数对Mo-Cu合金致密性、拉伸强度和延伸率的影响。结果表明,采用高能球磨机械合金化和液相烧结,可获得相对密度高达98.2%的Mo-Cu合金,再经致密化变形加工处理后,可获得全致密的Mo-Cu合金,在40%变形率的条件下,拉伸强度可达到569MPa,延伸率为6.3%。

The low quality fraction Mo-Cu alloy were fabricated by using a technology consisting of mechanical activating powder preparation,liquid-phase sintering and densification treatment processes of compactification. An analysis was made on the micrograph of Mo-Cu composite powder,microstructure of liquid-phase sintering and densification treatment processes by means of XRD and SEM,the effects of all kind of technology parameter on the density,tensile strength and the elongation. The results indicate that Mo-Cu alloy with relative density 98.2% can be prepared by the processes of mechanical alloying using high-energy milling and liquid-phase sintering,full density of Mo-Cu alloy is achieved when specimens are treated through compactification transformation processes,tensile strength is 569MPa and the elongation is 6.3% when transformation degree is 40%.