粉末冶金法制备铜/陶瓷复合材料的研究

Preparation of Copper/Ceramic Composite by Powder Metallurgy Method

采用粉末冶金法,利用金属Cu粉和陶瓷粉料经压制后在1070℃真空气氛烧结炉中烧结10 min制备出了不同Cu含量的铜/陶瓷复合材料,分别研究了Cu含量对铜/陶瓷复合材料组织结构和力学性能的影响。结果表明,所制备的铜/陶瓷复合材料主要由SiO_(2),Al_(2)O_(3)和Cu等相组成,铜/陶瓷复合材料的显微组织结构显示陶瓷基体存在较多的孔洞,Cu相分布不均匀,有明显的偏聚,且随着Cu含量的增加,复合材料基体孔洞逐渐降低。此外复合材料的密度和断裂韧性随Cu含量的增加呈递增趋势,而硬度随Cu含量的增加呈下降趋势。

Cu/ceramic composites with different Cu contents were prepared by powder metallurgy method.The metal Cu powder and ceramic powder were pressed and sintered in a vacuum sintering furnace at 1070℃for 10 min.The effects of Cu content on microstructure and mechanical properties of Cu/ceramic composites were studied.The results show that the Cu/ceramic composites are mainly composed of SiO_(2),Al_(2)O_(3) and Cu phases.The microstructure of the Cu/ceramic composites shows that there are many holes in the ceramic matrix.The Cu phase distribution is not uniform and there is obvious segregation.And with the increase of Cu content,the holes of the composite matrix decrease gradually.In addition,the density and fracture toughness of composites increased with the increase of Cu content,while the hardness decreased with the increase of Cu content.