Microstructure and mechanical properties of Mg – Al9Zn/SiCp composite produced by vacuum stir casting process
Source: Materials Science and Technology, Volume 20, Number 6, June 2004 , pp. 765-771(7)
Publisher: Maney Publishing
Abstract:15 vol.-% SiC particle reinforced cast Mg – 9AlZn (AZ91C) composite was produced by a vacuum stir casting process, and the microstructure and mechanical properties of the composite investigated. The stirring process was carried out at a speed of 750 – 1500 rev min-1 with a stainless steel impeller for 25 min in a vacuum of 20 – 40 mbar. SiC particles in the composite exhibited a reasonably homogeneous distribution and were well wetted by magnesium. The Mg – Al9Zn/15SiCp composite showed significant improvement in yield strength and elastic modulus following T4 heat treatment. The ultimate tensile strength of the composite was low, but close to that of unreinforced magnesium alloy. Mg/SiC interfacial reactions and reaction mechanisms are discussed. No evident interfacial products were found at a low process temperature of 700°C. However, significant chemical reactions at the Mg/SiC interface occurred when the composite melt was maintained at 750°C, and complex reaction products were formed. The fluidity of the composite melt deteriorated seriously after the interfacial reactions occurred.
Document Type: Research Article
Affiliations: 1: National Laboratory of Advanced Composites, Instituteof Aeronautical Materials, Beijing, 100095, China 2: School of Mechanical, Electronic and ControlEngineering, Beijing Jiaotong University, Beijing 100044, China.
Publication date: 2004-06-01
- Materials Science and Technology is Journal of the Month in November. This means free online access to all of the last 3 years of content, including the most recently published 2013 articles! Find out more here
In 1985 Metal Science was incorporated into Material Science and Technology: See issues of Metal Science from 1985 to present. The archive also includes the complete run of Metals Technology (1974–84): Click here to see these issues.
- Editorial Board
- Information for Authors
- Subscribe to this Title
- Terms & Conditions
- Online submission site
- ingentaconnect is not responsible for the content or availability of external websites