Processing, microstructure and mechanical properties of micro-SiC particles reinforced magnesium matrix composites fabricated by stir casting assisted by ultrasonic treatment processing

被引：183

作者：

Wang, X. J. ^{[1
,2
]}

Wang, N. Z. ^{[1
]}

Wang, L. Y. ^{[3
]}

Hua, X. S. ^{[1
]}

Wu, K. ^{[1
]}

Wang, Y. Q. ^{[4
]}

Huang, Y. D. ^{[2
]}

机构：

[1] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150006, Peoples R China

[2] Harbin Inst Technol, Sch Chem Engn & Technol, Harbin 150006, Peoples R China

[3] Harbin Turbine Co Ltd, Harbin, Peoples R China

[4] Harbin Engn Univ, Coll Mat Sci & Chem Engn, Harbin, Peoples R China

来源：

MATERIALS & DESIGN | 2014年 / 57卷

基金：

中国国家自然科学基金;

关键词：

Magnesium matrix composite; Ultrasonic; Stir casting; Particle distribution; Mechanical properties; NANO-COMPOSITES; VIBRATION;

D O I：

10.1016/j.matdes.2014.01.022

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The novel stir casting assisted by ultrasonic treatment processing was studied. Unlike traditional stir casting, short semi-solid stir time was needed for addition and pre-dispersion of the particles in the novel processing. For ultrasonic treatment, there existed an optimal time. Both too short and too long time for the treatment resulted in nonhomogeneous particle distribution. Furthermore, the liquid stirring after ultrasonic treatment was proved to be necessary to further improve particle distribution. The mechanical properties of the composites fabricated by different parameters indicated that ultrasonic treatment evidently improved the mechanical properties compared with traditional stir casting. 5-20% SiCp/AZ91 composites were fabricated by the novel processing. The particle distribution was uniform in these composites. The grains were refined by addition of SiC particles. Grain sizes of composites decreased with the increases of particle contents. The ultimate tensile strength, yield strength and elastic modulus were enhanced as the particle contents increased. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：638 / 645

页数：8

共 21 条

[1] Improvement in physical and mechanical properties of aluminum/zircon composites fabricated by powder metallurgy method [J].