铝基复合材料的力学性能及耐磨性研究

Study on mechanical properties and wear resistance of aluminum matrix composites

以铝粉和镁粉为基础材料,以SiC颗粒为增强体材料,制备建筑用的铝基复合材料,研究其力学性能及耐磨性。分别在SiC的质量分数为0~32%时测试铝基复合材料的力学性能,在3~18 MPa的外载荷下摩擦不同距离时,研究复合材料的耐磨性。结果表明:SiC含量较高时,复合材料中SiC团聚较明显,力学性能不佳;SiC的质量分数为8%时,铝基复合材料的硬度、抗拉强度、抗弯强度较优异;当SiC的质量分数为8%时制备的铝基复合材料在较高载荷作用下始终具有良好的耐磨性;摩擦距离越长,铝基复合材料耐磨性降低越多。

The mechanical properties and wear resistance of aluminum matrix composites for construction were studied by using aluminum powder and magnesium powder as base materials and SiC particles as reinforcement materials.The mechanical properties of aluminum matrix composites were tested when the mass fraction of SiC was 0-32%,and the wear resistance of the composites was studied under external load of 3-18 MPa at different distances.The results show that with more SiC content,the SiC agglomeration in the composites is obvious and the mechanical properties are poor.When the mass fraction of SiC is 8%,the hardness,tensile strength and bending strength of aluminum matrix composites are excellent.When the mass fraction of SiC is 8%,the aluminum matrix composite always has good wear resistance under high load.The longer the friction distance,the more the wear resistance of aluminum matrix composite decreases.