Optimum synthesis conditions of nanometric Fe50Ni50 alloy formed by chemical reduction in aqueous solution

Bulletin of materials science

Azza H El-Maghraby²  Mona M Abd El-Latif²  Marwa A Mohamed²  Hassan A Farag¹ 

[1] Department of Chemical Engineering, Faculty of Engineering, Alexandria University, Alexandria 21544, Egypt$$Department of Chemical Engineering, Faculty of Engineering, Alexandria University, Alexandria 21544, EgyptDepartment of Chemical Engineering, Faculty of Engineering, Alexandria University, Alexandria 21544, Egypt$$;Department of Fabrication Technology, Advanced Technology and New Materials Research Institute, City of Scientific Research and Technological Applications, New Borg El-Arab, Alexandria 21934, Egypt$$Department of Fabrication Technology, Advanced Technology and New Materials Research Institute, City of Scientific Research and Technological Applications, New Borg El-Arab, Alexandria 21934, EgyptDepartment of Fabrication Technology, Advanced Technology and New Materials Research Institute, City of Scientific Research and Technological Applications, New Borg El-Arab, Alexandria 21934, Egypt$$

关键词: FeNi alloys;    nanocrystalline alloy;    nanoparticles;    chemical synthesis;    structural characterization.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

In the present article, various nanometric Fe₅₀Ni₅₀ alloys were synthesized by chemical reduction of the corresponding metal ions, with hydrazine in an aqueous solution. Process variables of reaction temperature, pH of the hydrazine solution and concentration of metal ions were varied in order to determine the optimum synthesis conditions regarding quality, productivity and cost. It is found that pH of hydrazine solution, at low concentration of metal ions, is the most crucial variable affecting the reaction rate, average crystallite and particle sizes of the synthesized nanometric Fe₅₀Ni₅₀ alloy, followed by the total concentration of metal ions. Thus, increase of pH of hydrazine solution acts as an efficient stabilizer in reducing the particle size. On the contrary, at high concentration of metal ions, the structural characteristics of the nanometric Fe₅₀Ni₅₀ alloy are almost insensitive to reaction temperature and pH of hydrazine solution, but the reduction rate is remarkably sensitive to reaction temperature. Based on these results, it is decided that a reaction temperature of 80 °C, pH of the hydrazine solution of 12.5 and concentration of metal ions of 0.6 M represent the optimum synthesis conditions. The role of pH of hydrazine solution in reducing the alloy’s average particle size as well as efficient stabilizer confirms tremendous effect of synthesis conditions on the alloy structure and therefore, the importance of this study for industrial production of nanometric Fe₅₀Ni₅₀ alloy.

【 授权许可】

Unknown