CAJ | 학술논문

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。
재진공배경하，장동용삼도목섬유예제체중，제득섬유결구적치밀적목동복합재료。통과공제목섬유예제체적표관밀도，가이방편지개변목동복합재료적성분조성。채용소묘전경화금상현미경관찰재료적미관조직형모，연구공예삼수대목동복합재료적성분、밀도、경도화전도솔적영향。결과표명：채용무방기술결합모압성형획득적목섬유예제체가형성교관범위적공극도，종이득도목함량불동적목동복합재료；용삼공예제득적목동복합재료구유치밀균균、특정명현적섬유결구조직；소득목동복합재료적치밀도균체도99%이상。당목질량분수위84.77%시，득도적재료치밀도체도최대치99.43%，기경도위226.7HV，전도솔위16.5 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.