Characterization of al-si-ni ternary alloy synthesis from reduction of sodium-fluosilicate and nickel oxide

Abstract EN

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, Na2SiF6/Altotal w.t ratio, Ni2O3/Altotal and reaction time.

The optimum processing parameters are; temperature 950oC, Na2SiF6/Altotal wt.

ratio is 1, Ni2O3/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