SiC组分含量对SiC/Cu复合材料力学性能的影响  

Influence of SiC Content on the Mechnical Properties of SiC/Cu Composites

作　　者：范冰冰[1] 关莉[1] 李凯[1] 吴曰送[1] 李明亮[1] 王海龙[1] 张锐[1,2] 

机构地区：[1]郑州大学材料科学与工程学院,郑州450001 [2]郑州航空工业管理学院,郑州450046

出　　处：《硅酸盐通报》2009年第B08期114-117,共4页Bulletin of the Chinese Ceramic Society

摘　　要：采用真空热压法制备了不同配比的SiC/Cu金属陶瓷复合材料。利用阿基米德原理测定了复合材料的密度及气孔率;利用Instron万能材料电子试验机测得其三点弯曲强度;采用Hv-1000显微硬度仪测试其显微硬度,采用X射线衍射仪(XRD)和扫描电子显微镜(SEM)对烧成样品的物相组成和断口显微形貌进行表征。结果表明:随着SiC组分含量的增加,SiC/Cu复合材料的致密度、抗弯强度均有所下降,而气孔率和显微硬度显著增加。在750℃,30MPa压力作用下,保温3min,制备得到的30SiC/70Cu(vol%)的复合材料,具有最优的力学性能,其显微硬度达到2087.2MPa,抗弯强度为174.0MPa。SiC/Cu复合材料的断裂行为既表现出一定的微观韧性特征,又表现出一定的脆性特征。The SiC/Cu metal-ceramic composites were prepared by Vacuum hot-pressed method. The densities and porosities of the SiC/Cu metal-ceramic composites obtained were measured by an Archimedean method. Their bending strengths were measured by an Instron Electrodynamics Test Instrument, and the microhardness was measured by Hv-1000. The techniques of XRD and SEM were used to characterize the phases and the morphologies of the SiC/Cu metal-ceramic composites. The results showed that the densities and the bending strength were increased with the increases in the amounts of SiC,and the porosity and the microhardness were also highly increased. The 30SiC/70Cu （vol%） composite has the optimum mechanical property, the microhardness reached 2087.2 MPa, the bending strength was 174.0 MPa.

关 键 词：SIC/CU 金属陶瓷复合材料 力学性能 断裂行为 

分 类 号：TB333[一般工业技术—材料科学与工程]