Microstructure and Mechanical Properties of Nano-ZrO2 and Nano-SiO2 Particulate Reinforced AZ31-Mg Based Composites Fabricated by Friction Stir Processing

C. I. Chang; Y. N. Wang; H. R. Pei; C. J. Lee; X. H. Du; J. C. Huang

doi:10.4028/www.scientific.net/kem.351.114

Author(s)

C. I. Chang
Y. N. Wang
H. R. Pei
C. J. Lee
X. H. Du

Detail(s)

Original language	English
Pages (from-to)	114-119
Journal / Publication	Key Engineering Materials
Volume	351
Online published	15 Oct 2007
Publication status	Published - 2007
Externally published	Yes

Conference

Title	The 5th China Cross-strait Conference on Composite Materials
Location	Shanghai Jiao Tong University
Place	China
City	Shanghai
Period	22 - 26 October 2006

Link(s)

DOI	DOI https://doi.org/10.4028/www.scientific.net/kem.351.114 Final Published version
	Check@CityULib
Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-34548128305&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(6d67b8a9-ecaa-4a25-8ef9-0f06c9e04d72).html

Abstract

Friction stir processing (FSP) has been applied to fabricate 10~20 vol% nano-sized ZrO2 and 5~10 vol% nano-sized SiO2 particles into an Mg-AZ31 alloy to form bulk composites under the FSP parameters of advancing speed of 800 rpm and pin rotation of 45 min/min. The microstructures and mechanical properties of the resulting composites were investigated. The clustering size of nano-ZrO2 and nano-SiO2 particles, measuring average ∼200 nm was relatively uniformly dispersed, and the average grain size of the both Mg alloy of the composites varied within 1.0~2.0 μm after four FSP passes. No evident interfacial product between Zr02 particles and Mg matrix was found during the FSP mixing in AZ31-Mg/ZrO2. However, significant chemical reactions at the AZ31-Mg/SiO2 interface occurred to form the Mg2Si phase. The mechanical responses of the nano-composites in terms of hardness and tensile properties are examined and compared.