Preparation of 6.5wt% Si-Fe by mechanical alloying

✍ Scribed by O. Kohmoto; N. Yamaguchi; T. Mori

• Publisher: Springer
• Year: 1994
• Tongue: English
• Weight: 288 KB
• Volume: 29
• Category: Article
• ISSN: 0022-2461
• DOI: 10.1007/bf00356666

✦ Synopsis

A mechanical alloying process was studied by X-ray diffraction (XRD), differential scanning calorimetry (DSC) and magnetic measurements for 6.5 wt% Si-Fe powders. The alloying process was divided into three stages. In the first stage ( < 11 ks of the milling time), the Curie temperature, Tc, was the same as that of pure Fe, which indicated that the particles were not yet alloyed. At a milling time of 22 ks, the second stage, a large calorific value and a large coercive force, H c , were observed and T c was not clearly observed, which indicated that the particles had a precise lamellar structure and had a large internal stress. In the third stage ( > 90 ks), the calorific value and H c decreased. At the same time, a unique, and smaller Tc was observed, which indicated that the uniformity of the powders increased.