Interfacial Characteristic of as-Deformed SiCp-Reinforced Magnesium Matrix Composite
来源期刊：Acta Metallurgica Sinica2014年第5期
论文作者：Kun Kun Deng Jian Chao Li Jian Feng Fan Xiao Jun Wang Kun Wu Bing She Xu
文章页码：885 - 893
摘 要：The（submicron+micron） Si Cp-reinforced magnesium matrix composite was fabricated by stir casting. After the application of forging and extrusion, the interface between Si Cp and Mg in the composite was investigated by transmission electron microscopy. Results show that the interfacial characterization was different at the interfaces of micron-Si Cp/Mg and submicron-Si Cp/Mg. While most interfaces between micron-Si Cp and Mg were clean, the precipitated Mg17Al12 phase as well as dispersedly distributed nano-Mg O particles was observed at some interfaces. Unlike the interface between micron-Si Cp and Mg, no interfacial reaction product was found at the interface between submicron-Si Cp and Mg in the present study. Besides, the specific orientation relationships were found at the interfaces between submicronSi Cp and Mg, which was thought to have developed during hot deformation process. At the fracture surface of the composite, the microcracks were found at the interface between micron-Si Cp and Mg, while the interfacial bonding between submicron-Si Cp and Mg was very well.
Kun Kun Deng1,2，Jian Chao Li1，Jian Feng Fan2，Xiao Jun Wang3，Kun Wu3，Bing She Xu2
1. College of Materials Science and Engineering,Taiyuan University of Technology2. Key laboratory of interface science and engineering in advanced materials,Ministry of Education,Taiyuan University of Technology3. School of Materials Science and Engineering,Harbin Institute of Technology
摘 要：The（submicron+micron） Si Cp-reinforced magnesium matrix composite was fabricated by stir casting. After the application of forging and extrusion, the interface between Si Cp and Mg in the composite was investigated by transmission electron microscopy. Results show that the interfacial characterization was different at the interfaces of micron-Si Cp/Mg and submicron-Si Cp/Mg. While most interfaces between micron-Si Cp and Mg were clean, the precipitated Mg17Al12 phase as well as dispersedly distributed nano-Mg O particles was observed at some interfaces. Unlike the interface between micron-Si Cp and Mg, no interfacial reaction product was found at the interface between submicron-Si Cp and Mg in the present study. Besides, the specific orientation relationships were found at the interfaces between submicronSi Cp and Mg, which was thought to have developed during hot deformation process. At the fracture surface of the composite, the microcracks were found at the interface between micron-Si Cp and Mg, while the interfacial bonding between submicron-Si Cp and Mg was very well.
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