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| Influence of Si content on the microstructure and property of RE-Al-Fe alloy |
| FAN Xiu-feng 1，YAN Yong-wang2，HUO Wen-xia1， LUO Long1， CHEN Yi-sheng1 |
1. Analytical and Testing Center， Inner Mongolia University of Science and Technology， Baotou 014010， China；
2. School of Material and Metallurgy， Inner Mongolia University of Science and Technology， Baotou 014010， China |
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Abstract The effects of Si content on the microstructure and property of RE-Al-Fe alloys were investigated by doping different amounts of ferrosilicon into 3% RE-Al-Fe alloy. The microstructure and of phase structure of samples was investigated using scanning electron microscope （SEM） and X-ray diffraction （XRD）， respectively. The results showed that 3% RE-Al-Fe without Si was composed of FeAl3， Fe2Al5 and RE-Al-Fe phase. With the gradual increase of Si content （2%， 4%， 6% and 8%）， the Al-Fe-Si phase was observed in alloys. The strength of Al-Fe-Si diffraction peak firstly increased and then decreased with the increase of Si content， and the diffraction peak intensity was highest when the Si content was 6%. Similarly， the hardness of material also firstly increased and then decreased with the increase of Si content， and the maximum hardness was 92HV when the Si content was 6%.
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Received: 19 June 2019
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2020, Vol. 38 
