Microstructure characterization of SiC nanowires as reinforcements in composites

被引：38

作者：

Dong, Ronghua ^{[1
]}

Yang, Wenshu ^{[1
]}

Wu, Ping ^{[2
]}

Hussain, Murid ^{[3
]}

Xiu, Ziyang ^{[1
]}

Wu, Gaohui ^{[1
]}

Wang, Pingping ^{[1
]}

机构：

[1] Harbin Inst Technol, Dept Mat Sci & Engn, Harbin 150001, Peoples R China

[2] Northwest Inst Nucl Technol, Xian 710024, Peoples R China

[3] COMSATS Inst Informat Technol, Dept Chem Engn, Lahore 54000, Pakistan

来源：

MATERIALS CHARACTERIZATION | 2015年 / 103卷

关键词：

SiC nanowires; Crystal structure; Cross-section microstructure; Hybrid structure; SILICON;

D O I：

10.1016/j.matchar.2015.03.013

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

SIC nanowires have been rarely investigated or explored along their axial direction by transmission electron microscopy (TEM). Here we report the investigation of the cross-section microstructure of SiC nanowires by embedding them into Al matrix. Morphology of SiC nanowires was cylindrical with smooth surface or bamboo shape. Cubic (3C-SiC) and hexagonal structure (2H-SiC) phases were detected by X-ray diffraction (XRD) analysis. High density stacking faults were observed in both the cylindrical and bamboo shaped nanowires which were perpendicular to their axial direction. Selected area electron diffraction (SAED) patterns of the cylindrical and bamboo shaped SiC nanowires both in the perpendicular and parallel direction to the axial direction were equivalent in the structure. After calculation and remodeling, it has been found that the SAED patterns were composed of two sets of diffraction patterns, corresponding to 2H-SiC and 3C-SiC, respectively. Therefore, it could be concluded that the SiC nanowires are composed of a large number of small fragments that are formed by hybrid 3C-SiC and 2H-SiC structures. (C) 2015 Elsevier Inc. All rights reserved.

引用

页码：37 / 41

页数：5

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