Distribution of Si particles in hypereutectic aluminum alloy tubes prepared under electromagnetic field

• Published in: Transactions of Nonferrous Metals Society of China Vol. 16; no. A03; pp. 1292 - 1294
• Main Author: 张志清 李丘林 刘伟 刘庆
• Format: Journal Article
• Language: English
• Published: Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China%Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China%Laboratory of Advanced Materials, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China 01.12.2006; Laboratory of Advanced Materials, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
• Subjects: 金属加工; 金属铸造; electromagnetic field (EMF); Al-Si alloy; gradient distribution; centrifugal casting
• ISSN: 1003-6326

Hypereutectic Al-Si alloy tubes were produced by centrifugal casting process using an electromagnetic field （EMF）. A gradient distribution of the primary Si particles was formed along the tube thickness direction. In the absence of EMF the primary Si moves to inner periphery with increasing rotation speed. The distribution of primary Si can be controlled by the EMF. With inceasing electromagnetic field intensity, the primary Si moves from the inner periphery to the outer periphery of the tubes. Most of the primary Si can be driven to the outer if the electromagnetic field intensity is increased to a certain value. It is found that the particle distribution and local volume fraction vary with both the rotation speed and the electromagnetic field intensity.