SiO_(2(p))增强Al-Cu-Mg基复合材料的组织及耐磨性

Microstructure and wear resistance of SiO_(2(p)) reinforced Al-Cu-Mg based composite

为研究添加SiO2(p)对铝基复合材料组织及耐磨性的影响,通过粉末冶金方法制备了不同SiO2(p)含量的Al-Cu-Mg基复合材料,通过X射线衍射仪、扫描电镜、布氏硬度计、ML-10型磨损试验机对样品的组成成分、表面形貌、硬度、耐磨性等进行表征。结果表明,样品中形成了Al2Cu、Mg2Si硬化相;随SiO2(p)含量的增加,样品的密度降低,硬度及耐磨性先增加后降低;SiO2(p)含量为5%时硬度最大,为62 HBW;SiO2(p)含量为20%时,样品耐磨性最好。

In order to research effect of SiO2（ p）powder on the wear-resistance of aluminium-based composite,Al-Cu-Mg based composite with different content of SiO2（ p）was prepared by powder metallurgy. Phase,surface morphology,hardness and wear resistance of the composite were tested by X-ray diffractometer（ XRD）,scanning electron microscope（ SEM）,Brinell hardness tester and ML-10 type wear testing machine,respectively. The results show that the strengthening phases Al2 Cu and Mg2 Si exist in the sample,with SiO2（ p）content increasing,the density decrease and the hardness and wear-resistance first increase and then decrease. The maximum hardness is 62 HBW for the sample with 5% SiO2（ p）. The wear resistance is best for the sample with 20% SiO2（p）.