真空二次热压及复压复烧对铜/金刚石复合材料致密度的影响  被引量:2

Effects of Vacuum Second Hot-pressing and Repressing and Re-sintering on Relative Density of Cu/diamond Composite

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作  者:赵娜[1] 梁晓光[1] 程莲萍[1] 韩超[1] 朱心昆[1] 

机构地区:[1]昆明理工大学材料科学与工程学院,云南昆明650093

出  处:《热加工工艺》2011年第24期132-135,共4页Hot Working Technology

摘  要:采用真空二次热压和复压复烧烧结技术制备了铜/金刚石复合材料,研究并讨论了烧结方法和混粉工艺以及金刚石颗粒尺寸和体积分数对该复合材料致密度和微观形貌的影响。结果表明,真空热压烧结的复合材料致密度优于复压复烧,且二次热压对其致密度有明显改善,其中金刚石分数40vol%,粒度90μm的铜/金刚石复合材料的致密度最高,达到了98.45%。Cu/diamond composite was produced by vacuum second hot-pressing and repressing and re-sintering technology. The effects of different sintering processes, powder mixing processes and the diamond particle size, volume fraction on the relative density and micromorphology of composites were studied. The results show that the relative density ofcomposites prepared by vacuum second hot-pressing is higher than that by repressing and re-sintering, and the second hot-pressing obviously enhances the relative density of composites. The maximum relative density of 98.45% of the composite with diamond volume fraction of 40% is obtained, with diamond particle size of 90 um.

关 键 词:真空二次热压 复压复烧 铜/金刚石复合材料 致密度 

分 类 号:TB333[一般工业技术—材料科学与工程]

 

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