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黃寅曄,金澤基,孫紅在 忠南大學校 産業技術硏究所 1987 산업기술연구논문집 Vol.2 No.2
Measurement apparatus of magnetostriction constant was made by small-angle magnetization rotation method that is used in low magnetic field(∼300 Oe). Magnetostriction constant of the amorphous Fe Si P alloys prepared by single roller guenching method decreases with increasing Si contents at the range of 12∼22×10.
비정질 (Fe, Co) 80 (Si, B, P) 20 합금의 자기적 특성
김택기,황인엽,조용수 대한금속재료학회(대한금속학회) 1989 대한금속·재료학회지 Vol.27 No.11
The magnetic properties of amorphous Fe_(80-x)Co_xSi_6B_(14)(10≤X≤70, X ; 10at% interval) and Fe_(80-x)Co_xSi_9B_9P₂(10≤X≤70, X, 15 at% interval) have been investigated. The amorphous alloys were fabricated into ribbons by a single-roller rapid quenching technique. The saturation magnetization and its temperature-dependence, coercive force and power loss were studied. The saturation magnetization of the amorphous Fe_(80-x)Co_xSi_9B_9P₂alloy shows similar tendency to that of amorphous Fe_(80-x)Co_xSi_6B_(14) alloy except Fe-rich composition at room temperature. The average effective magnetic moment per transition metal atom in both alloys is 2.10-141 μ_B, and decreases with Co content, but increases slightly with Co content from X=40. The coercive force and power loss are 0.31-0.11 Oe and 33-49 mW/Kg at 0.5 Tesla and 60 Hz, respectively, and decrease with Co content.
김택기,황인엽,조용수 대한금속재료학회(대한금속학회) 1989 대한금속·재료학회지 Vol.27 No.12
Magnetostriction of soft magnetic Fe_(80-x)Co_xSi_6B_(14)(10≤X≤78) amorphous alloy was investigated by using a small-angle magnetization rotation apparatus. Rapid quenching technique with using single roller was employed to prepare the amorphous ribbons. Saturation magnetizaion constant, λs, determined for alloys with various compositions. The magnetostriction reaches 22.2 ×10^(-6) for X= 10 and decreases with increasing Co content. The magnetostriction reaches zero at around X= 74.5 and is -2.60 ×10^(-6) at X=78. This result was compared with the magnetostriction of Fe-Co alloy. Metalloids do not affect the zero-magnetostriction of the amorphous.
이우진,김종오,김택기,황인엽 대한금속재료학회(대한금속학회) 1981 대한금속·재료학회지 Vol.19 No.7
The crystallization mechanism of amorphous Fe-P alloys has been investigated through the differential thermal analysis, the X-ray diffraction, and the change of the electrical resistance to temperature and time variations. 1) The crystallized products were α-Fe(bcc, a=2.86Å) and Fe₃P(bct, a=9.llÅ, c=4.46Å, c/a=0.490) regardless of the concentration range of amorphous Fe-P alloys. 2) Crystallization temperature of the three amorphous samples, Fe_(84)P_(16), Fe_(83)P_(17) and Fe-(82)P_(18) measured by the DTA and resistance methods were 368℃, 373℃, and 377℃ respectively. 3) The crystallization process of the amorphous Fe-P alloy was different according to the phosphorous concentration. The process of Fe_(84)P_(16) and Fe_(83)P_(17) was based on the auto-catalysis but that of Fe_(82)P_(18) was on the nucleation and grain growth. Activation energies for the crystallization were computed as 37.3 ㎉/㏖ for Fe_(84)P_(16), 38.3 ㎉/㏖ for Fe_(83)P_(17) and 40.6 ㎉/㏖ for Fe_(82)P_(18), individually.