不同冷压压力下Fe­Cu基金刚石复合材料超薄切锯胎体的组织和致密化机理

摘要

采用单轴模压法，以Fe­Cu基单元素混合粉末为原材料，在不同冷压压力下制备Fe­Cu基金刚石复合材料超薄切锯胎体压坯；利用显微硬度仪、阿基米德原理和OM、SEM表征冷压坯的显微硬度、组织和密度，研究不同压力下冷压坯的致密化机理。结果表明：随着冷压压力的增大，压坯中粉末的变形不均匀，粉末间摩擦力不断发生变化，制约了粉末颗粒的结合方式、显微硬度、排布及胎体密度。%　　A green sample of Fe­Cu­based diamond composite ultra thin sawing matrixes was prepared by cold uniaxial compaction technology at different cold pressures using Cu­Fe based single element mixed powder as raw materials. The microstructure, density and densification mechanism of the green were investigated by microhardness tester, Archimedes principle, OM and SEM. The results show that the non uniform deformation and changing friction force of inter­powders in green samples occur with increasing pressure, which determines bonding mode, microhardness, arrangement of powders and green densities.