HRTEM study of interfacial structure in SiCp/A390 composites. (20th April 2020)

• Record Type: Journal Article
• Authors: Wang, Zhen; Wang, Aiqin; Han, Huihui; Xie, Jingpei
• Is Part Of: Materials research express. Volume 7:Number 4(2020)
• Publication Date: 2020-04-20
• Subjects: SiCp/A390 composites -- interface -- Si particles -- crystallographic orientation relationship; Materials science -- Research -- Periodicals; Materials science -- Periodicals; 620.11
• DOI: 10.1088/2053-1591/ab871d
• Languages: English
• ISSNs: 2053-1591

Abstract

Abstract: SiCp/A390 composite was fabricated by powder metallurgy method and hot extrusion process. The interfacial microstructure of SiCp/A390 composites after heat treatment was characterized by HRTEM. The results show that the interface between SiC and Al matrix has an orientation relationship of [4 5 ̄ 10]SiC //[0 1 ̄ 1]Al, (10 1 ̄ 0) SiC //( 1 ̄ 11) Al and forming a semi-coherent interface. The crystallographic orientation relationship between SiC and Si in the SiCp/A390 composites is [010]SiC //[001]Si, (004)SiC //(220)Si. The interplanar spacing of Al matrix on lattice plane (111) is close to the twice interplanar spacing of the Si phase on lattice plane (400). They keep a semi-coherent crystal plane, with an orientation relationship of [01 1 ̄ ]Al //[001]Si, (111)Al //(400)Si .