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CHARACTERIZATION OF AL-SI-NI TERNARY ALLOY SYNTHESIS FROM REDUCTION OF SODIUM- FLUOSILICATE AND NICKEL OXIDE
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نویسنده
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farag mohammed ,moatasem m. kh . ,atlam a. a. ,omran a. m.
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منبع
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journal of al azhar university engineering sector - 2018 - دوره : 13 - شماره : 48 - صفحه:1100 -1108
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چکیده
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A new al-si-ni high-temperature processed alloy has been obtained using sodium fluosilicate as a source of si and nickel oxide as a source of ni. throughout the study, we tested the optimum parameters affecting the preparation of al-si-ni ternary alloy; bath temperature, na_2sif_6/altotal w.t ratio, ni_2o_3/altotal and reaction time. the optimum processing parameters are; temperature 950^oc, na2sif6/altotal wt. ratio is 1, ni_2o_3/altotal wt. ratio is 0.082 and reaction time is 25 min. some tests such as chemical analysis, x-ray diffraction and microstructure examination were carried out on the produced alloys. the obtained results indicate that the produced alloys containing up to 10.75% si and 2.86 ni in the form of al3ni. the presence of eutectic si and eutectic al3ni could form interconnected system and it can be used as high-performance alloys at elevated temperature.
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کلیدواژه
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High temperature alloys ,Sodium fluosilicate ,Al-Si-Ni ternary alloy ,Nickel oxide
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آدرس
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al-azhar university, faculty of engineering, mining and metallurgical engineering department, Egypt, al-azhar university, faculty of engineering, mining and metallurgical engineering department, Egypt, al_azhar university, faculty of engineering, Egypt, al-azhar university, faculty of engineering, mining and metallurgical engineering department, Egypt
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Authors
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