Effect of mixed rare earth oxides and CaCO 3 modification on the microstructure of an in‐situ Mg 2 Si/Al‐Si composite
Authors:
- 15 March 2009
- journal article
- Published by Wiley in Rare Metals
- Vol. 28 (2) , 169-174
Abstract
The effects of mixed rare earth oxides and CaCO 3 on the microstructure of an in‐situ Mg 2 Si/Al‐Si hypereutectic alloy composite were investigated by optical microscope, scanning electron microscope, and energy dispersive spectrum analysis. The results showed that the morphology of the primary Mg 2 Si phase particles changed from irregular or crosses to polygonal shape, their sizes decreased from 75 µm to about 25 µm, and the compound of both the oxide and CaCO 3 was better than either the single mixed rare earth oxides or CaCO 3 .Keywords
This publication has 17 references indexed in Scilit:
- Semisolid microstructure of Mg2Si/Al composite by cooling slope cast and its evolution during partial remelting processMaterials Science and Engineering: A, 2007
- Thixocasting of hypereutectic Al–25Si–2.5Cu–1Mg–0.5Mn alloys using densified powder compactsMaterials Science and Engineering: A, 2004
- Precipitation of Si particles in a super-rapidly solidified Al–Si hypereutectic alloyMaterials Chemistry and Physics, 2003
- Microstructural characteristics and mechanical properties of hypo-eutectic and hyper-eutectic Al–Si alloys in the semi-solid forming processJournal of Materials Processing Technology, 2001
- Dissolution kinetics of primary silicon in hypereutectic Al–Si meltScience and Technology of Advanced Materials, 2001
- Microstructural refinement in Al–Mg2Si in situ compositesJournal of Materials Science Letters, 1999
- Effects of Si content on the microstructure and tensile strength of an in situAl/Mg2Si compositeJournal of Materials Research, 1999
- A reciprocating extrusion process for producing hypereutectic Al–20wt.% Si wrought alloysMaterials Science and Engineering: A, 1998
- Effect of process variables on structure and properties of aluminium–silicon piston alloyJournal of Materials Processing Technology, 1998
- Growth of eutectic silicon from primary silicon crystals in aluminium-silicon alloysScripta Materialia, 1997