科研之友
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摘要
The alloys of Fe-6Si-8B and Fe-6Si-8B-1Mn were prepared using high energy planetary ball mill. X-ray diffraction patterns of the milled samples confirmed the formation of the alloys by dissolution of Si in Fe after 30 and 24 h of milling for the Fe-6Si-8B and Fe-6Si-8B-1Mn samples respectively. The lattice parameter was found to increase continuously with milling time and the rise was steeper for the quaternary alloy. After 36 h of milling, the crystallite size for the two samples were reduced to 98 and 86 nm respectively. Mossbauer spectra suggested the formation of minor amount of alpha-Fe2O3. The value of saturation magnetization was 162 Am-2/kg for Fe-6Si-8B alloy obtained after 18 h of milling. However, the value decreased with increased milling time as well as with Mn-addition. The remanance value showed similar tendency as that for saturation magnetization. In contrast, the coercivity value was found to be increasing with milling time and with Mn-addition.
- 出版日期2017-8
