A novel (AlN + Si3N4)/Al composite with well-balanced strength and ductility

作者：Xu, Qingfei; Ma, Xia; Hu, Kaiqi; Gao, Tong; Liu, Xiangfa^*

来源：Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 2018, 726: 113-119.

DOI：10.1016/j.msea.2018.04.053

• Al matrix composite
• AlN
• Si3N4
• Mechanical properties
• Texture

A novel aluminum matrix composite reinforced by AlN and Si3N4 particles was prepared. It is found that the mean sizes of AlN and Si(3)N(4)particles which distribute uniformly in the alpha-Al matrix, are 50 rim and 0.5 mu m, respectively. The as-extruded composite presents a sheet texture of {110} < 111 > , and the mean size of the alpha-Al grains at the longitudinal section is 1.14 mu m measured by electron backscatter diffraction (EBSD). After T4 heat treatment, the orientation of the alpha-Al grains has evolved and their mean size decreases to 0.63 mu m, which is ascribed to the recrystallization process. The composite exhibits excellent mechanical properties of well-balanced strength and ductility, which can be up to 425 MPa and 15.5%, respectively.

• 出版日期2018-5-30
• 单位山东大学