Mo-8wt%Cu纳米复合粉末的烧结与加工

用机械合金化法制取Mo-8%Cu(质量分数)纳米复合粉末,采用液相烧结和致密化后处理工艺制备了Mo-8%Cu(质量分数)合金。通过扫描电镜对Mo-Cu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、延伸率和晶粒尺寸的影响。结果表明,高能球磨的Mo-8%Cu(质量分数)纳米复合粉末坯体,经液相烧结后,其烧结态为Mo、Cu复合网状组织,可获得相对密度高达98.6%的Mo-Cu合金,再经静液挤压变形加工处理后,可获得全致密的Mo-8%Cu(质量分数)合金,在室温静液挤压40%形变率的条件下,拉伸强度可达到576MPa,延伸率5.8%。

Sintering and processing nanocomposite powder of Mo-8wt%Cu

Mo-8wt%Cu nano powders were fabricated by mechanical alloying,and the dense alloys were obtained via the liquid-phase sintering and post-treatment process.The microstructure of Mo-8wt%Cu alloy were investigated by scanning electron microscope(SEM),and the effects of process parameters on the density,tensile strength,the elongation and grain size were studied.The results indicate that the relative density of alloy is 98.6% after sintering at 1250℃ for 30 min,and its microstructure is composite network.The full density of Mo-Cu alloy is achieved when specimens are treated through hydrostatic extrusion transformation processes.The tensile strength is 576MPa,and the elongation is 5.8% when hydrostatic extrusion transformation degree is 40%.