纤维结构钼铜复合材料的制备及组织性能  

Fabrication and structure properties of fiber-structured Mo-Cu composites

作　　者：王婕丽[1] 林文松[1] 姜自旺[1] 杨国良[1] 段丽慧[1] 

机构地区：[1]上海工程技术大学材料工程学院,上海201620

出　　处：《中国有色金属学报》2014年第1期174-178,共5页The Chinese Journal of Nonferrous Metals

基　　金：上海市教委基金重点项目(13zz133);上海工程技术大学研究生科研创新资助项目(2012yjs14)

摘　　要：在真空环境下,将铜熔渗到钼纤维预制体中,制得纤维结构的致密的钼铜复合材料。通过控制钼纤维预制体的表观密度,可以方便地改变钼铜复合材料的成分组成。采用扫描电镜和金相显微镜观察材料的微观组织形貌,研究工艺参数对钼铜复合材料的成分、密度、硬度和电导率的影响。结果表明:采用无纺技术结合模压成形获得的钼纤维预制体可形成较宽范围的孔隙度,从而得到钼含量不同的钼铜复合材料;熔渗工艺制得的钼铜复合材料具有致密均匀、特征明显的纤维结构组织;所得钼铜复合材料的致密度均达到99%以上。当钼质量分数为84.77%时,得到的材料致密度达到最大值99.43%,其硬度为226.7HV,电导率为16.5 MS/m。In vacuum environment, the dense fiber-structured molybdenum-copper （Mo-Cu） composites were fabricated by infiltrating liquid copper into molybdenum fibrous preform. By controlling the relative density of molybdenum fibrous preform, the composition of Mo-Cu composites could be easily changed. The microstructure and morphologies of Mo-Cu composites were observed by scanning electron microscopy and optical microscopy, and the effects of process parameters on the composition, physical and mechanical properties were investigated. The results indicate that molybdenum fibrous preform obtained by non-woven technology with mould pressing formation has wider range of porosity, Mo-Cu composite with different molybdenum contents are obtained. The Mo-Cu composites have dense and homogeneous structure with obvious fibrous character by infiltration. The relative density of the composites is above 99%. When the mass fraction of molybdenum is 84.77%, the maximum relative density reaches 99.43% for fiber-structured Mo-Cu composites. Meanwhile, their hardness and electrical conductivity are 226.7HV and 16.5 MS/m, respectively.

关 键 词：纤维结构 钼铜复合材料 钼纤维 熔渗 

分 类 号：TG146.4[一般工业技术—材料科学与工程]