中國有色金屬學報(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 25 No. 3 March 2015 |
（1. Faculty of Mechanical Engineering, University of Maribor, Smetanova ulica 17, SI-2000 Maribor, Slovenia;
2. Faculty of Natural Sciences and Engineering, University of Ljubljana,
A？ker？eva cesta 12, SI-1000 Ljubljana, Slovenia）
Abstract:The interaction between a molten magnesium alloy AE44 and a SiC-Al2O3-SiO2 ceramics and the resulting reaction products were studied. The samples were investigated using optical and electron microscopy, energy dispersive X-ray spectroscopy and X-ray diffraction. SiO2 was predominantly reduced by Mg during the contact of the magnesium-rich melt with the ceramics. The main reaction product was MgO, whilst Si dissolved in the melt. Two novel tetragonal phases formed at the interface: AlSiRE and AlMgSiRE, having a specific mutual crystallographic orientation relationship. The interactions resulted in strongly connected interfaces between the metal and ceramics after short interaction time; however, interactions lead to disintegration of the ceramics after longer contact time.
Key words: metal matrix composites; AE44 Mg alloy; ceramics; interfacial reaction
