MAGNETOTHERMAL ANALYSIS OF Fe_(72.7)Cu_1Nb_2V_(1.8)Si_(13.5)B_9 ALLOY
WANG Zhi;HE Kaiyuan;ZHANG Luo (Northeastern University; Shenyang 110006)(Tianjin Institute of Technology; Tianjin 300191)(Shanghai Iron and Steel Research Institute; Shanghai 200940)
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WANG Zhi;HE Kaiyuan;ZHANG Luo (Northeastern University; Shenyang 110006)(Tianjin Institute of Technology; Tianjin 300191)(Shanghai Iron and Steel Research Institute; Shanghai 200940). MAGNETOTHERMAL ANALYSIS OF Fe_(72.7)Cu_1Nb_2V_(1.8)Si_(13.5)B_9 ALLOY. Acta Metall Sin, 1997, 33(12): 1289-1294.
Abstract Thermomagnetic curves (σs-T curve) of Fe(72.7)Cu1Nb2V(1.8)Si(13.5)B9 alloy annealed at different temperatures (763-883 K) for 1h were investigated by magnetic analysis.Based on theσs1/8 -T curve and X-ray diffraction analysis, the changes in volume fraction,saturation magnetization and Curie temperature of α-Fe(Si) phase and residual amorphous phase with annealing temperatures as well as the correlation between them were determined.The results showed that the saturation magnetization and Curie temperature of α-Fe(Si)phase, σsαand were decreased a little with increasing of Ta when Ta< 823 K and then invariable for Ta≥823K. The saturation magnetization and Curie temperature of residual amorphous phase,σsα and TCα were all decreased monotonically with increasing of Ta in the whole annealing process and had a linear correlation between them. The dependences of magnetic coupling between α-Fe(Si) grains and of saturation magnetostriction on volume fractions of each phase were also discussed.
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