The synthesis of a pure FeAl with a density greater than 95% of the theoretical density by optimizing the effective factors

Document Type : Research Article

Authors

1 Department of Material Science and Engineering, Birjand University of Technology, Birjand, Iran

2 Department of Materials Science and Engineering, Iran University of Science and Technology

3 Department of Mechanics, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, Iran

10.22060/ajme.2021.18021.5881

Abstract

In this study, the FeAl with a density greater than 95% of the theoretical density was synthesized by optimizing the compacting pressure, the particle size of iron and aluminum and the pre-heating temperature. To do so, the products of the samples which were examined by the change of the particle size of 10µm and 50µm, the pre-heating temperatures of 25°C, 287°C and 550°C and the compacting pressures of 400MPa, 500MPa and 600MPa, were studied. According to the appearance, composition, density, hardness and oxidation resistance, the optimum sample was determined. The optimal FeAl had the density more than 95% of the theoretical density which was prepared using the particle size of 10/10 of iron and aluminum, the pre-heating temperature of 550°C and the compacting pressure of 500 MPa. The duration of the pre-heating and the synthesis was also 5 and 3h respectively. It was found that without pre-heating, there is no possibility of producing a compact and dense product. It was also found that the particle size of the iron is more effective than the particle size of aluminum to achieve the qualified FeAl product.

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