Enhanced mechanical properties in Al/diamond composites by Si addition  

作　　者：Jian-Hua Wu Hai-Long Zhang Yang Zhang Jian-Wei Li Xi-Tao Wang 

机构地区：[1]Shandong Engineering Research Center for Lightweight Automobiles Magnesium Alloy,New Materials,Shandong Academy of Sciences [2]State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing

出　　处：《Rare Metals》2016年第9期701-704,共4页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (No.51271017);the Fundamental Research Funds for the Central Universities (No.FRFTP-13-033A);the Program for New Century Excellent Talents in University (No.NCET-10-0227)

摘　　要：Diamond particles reinforced aluminum–silicon matrix composites,abbreviated as Al（Si）/diamond composites,were fabricated by squeeze casting.The effect of Si content on the microstructure and mechanical properties of the composites were investigated.The mechanical properties are found to increase monotonically with Si content increasing up to 7.0 wt%.The Al-7.0 wt% Si/diamond composite exhibits tensile strength of 78 MPa,bending strength of 230 MPa,and compressive strength of426 MPa.Al–Si eutectic phases are shown to connect with Al matrix and diamond particles tightly,which is responsible for the enhancement of mechanical properties in the Al（Si）/diamond composites.Diamond particles reinforced aluminum–silicon matrix composites,abbreviated as Al（Si）/diamond composites,were fabricated by squeeze casting.The effect of Si content on the microstructure and mechanical properties of the composites were investigated.The mechanical properties are found to increase monotonically with Si content increasing up to 7.0 wt%.The Al-7.0 wt% Si/diamond composite exhibits tensile strength of 78 MPa,bending strength of 230 MPa,and compressive strength of426 MPa.Al–Si eutectic phases are shown to connect with Al matrix and diamond particles tightly,which is responsible for the enhancement of mechanical properties in the Al（Si）/diamond composites.

关 键 词：Composite materials Diamond particles Mechanical properties Interfaces 

分 类 号：TB33[一般工业技术—材料科学与工程]