摘要
Al_(2)O_(3) particles reinforced hypereutectic Al-Si composites were prepared by in situ Fe_(2)O_(3)/Al reaction system.The thermodynamic analysis and microstructure evolution were investigated by differential scanning calorimetry,optical microscope,scanning electronic microscopy and transmission electron microscope.Results show that the reaction between Fe_(2)O_(3) and Al is spontaneous which can be separated into two steps at different temperatures.The in situ Al_(2)O_(3) particles in nano size distribute on the Al matrix accompanied with long needle-shapedβFe-rich intermetallic phase.With different content of Mn addition,βphase can be modified toα-Al15(Mn,Fe)3Si2 andδ-Al4(Fe,Mn)Si2.Both tensile strength and elongation results at room temperature and 300℃reveal that the optimal Fe-rich intermetallic phase is finer Chinese-script and polyhedralαphase with a Mn/Fe mass ratio 0.5 for the composites.Both in situ Al_(2)O_(3) particles andα-Fe phases contribute to the properties improvement of the composites。
作者
王逸飞
张静
SUN Chichi
CHENG Zhaoxia
PANG Zhouyi
WANG Ling
CHEN Hongmei
LIU Ning
WANG Yifei;ZHANG Jing;SUN Chichi;CHENG Zhaoxia;PANG Zhouyi;WANG Ling;CHEN Hongmei;LIU Ning(School of Metallurgy and Materials Engineering,Jiangsu University of Science and Technology,Zhangjiagang 215600,China;Zhangjiagang Industrial Technology Research Institute,Jiangsu University of Science and Technology,Zhangjiagang 215600,China;Yingkou Institute of Technology,Yingkou 115014,China;School of Materials Science and Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China)
基金
Funded by the National Natural Science Foundation of China(No.51201071)
the National Natural Science Foundation of Jiangsu Province(No.BK20161270)
Jiangsu Overseas Visiting Scholar Program for University Prominent Young&Middle-aged Teachers and Presidents(2018)。
