[T1] Powder Production

[15P-T1-10] Effect of Manufacturing Parameters on the Properties of Fe-Based Amorphous Powders during Hybrid Gas-Water Atomization Process

*D. Kwon¹, K. Lee², Y. Lee¹, J. Hong¹, H. Kim¹ (1.Korea Institure of Industrial Technology, Korea, 2.Inha University, Korea)

キーワード：Water atomization, Fe-based amorphous powder, Glass forming ability, Soft magnetic property, Amorphous fraction

The Fe-based amorphous soft magnetic materials, characterized by low coercivity, high permeability, and excellent energy conversion properties, are attractive candidates as materials for energy conversion components in the range of high-frequency. However, to manufacture Fe-based amorphous soft magnetic powders, a high cooling rate is required during solidification. The content of metalloid additives as Si, B, C and P must be increased to enhance amorphous forming ability of Fe-based amorphous alloys. However, these elements induce low saturation magnetic flux density. Consequently, recent research has been actively focused on improving the water atomization process technology to enhance cooling rates resulting to high-performance Fe-based amorphous soft magnetic powders.
In this study, we aimed to optimize the manufacturing parameters for high magnetization Fe-based amorphous powder using the hybrid gas-water atomization process, which combines gas and water atomization to enhance the cooling rate compared to the conventional gas or water atomization process. The powder of FeCrSiBC amorphous alloy was manufactured under various process parameters, including gas pressure, water pressure, melting temperature, orifice hole size during the powder manufacturing process. The properties of this powder such as amorphous fraction and magnetic properties of the powder prepared were investigated to optimize these properties.