Giant Stress-Impedance Effect in Co71.8 Fe4. 9 Nb0.8Si7.5B15 Glass-Covered Amorphous Wires

The giant stress-impedance （GSI） effect in as-cast and DC current annealed Co71.8Fe4.9 Nb0.8Si7.5 B15 amorphous glass-covered wires is presented. The SI ratio of the as-cast sample exhibits negative GSI effect. For the sample annealed by 60 mA DC current, the SI ratio first increases with applied te...

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Bibliographic Details
Published in:Journal of iron and steel research, international international, 2006, Vol.13 (4), p.49-50
Main Author: CHEN Zheng LI De-ren LU Zhi-chao ZHOU Shao-xiong
Format: Article
Language:English
Subjects:
Co71.8
Fe4
Nb0.8Si7.5B15
钴合金
非晶线
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Summary:The giant stress-impedance （GSI） effect in as-cast and DC current annealed Co71.8Fe4.9 Nb0.8Si7.5 B15 amorphous glass-covered wires is presented. The SI ratio of the as-cast sample exhibits negative GSI effect. For the sample annealed by 60 mA DC current, the SI ratio first increases with applied tensile stress, then decreases. The maximum ΔZ/Z ratio of 304% is obtained. Frequency dependence in the range from 1 to 110 MHz of the GSI effect is investigated. Experimental results show that the real part R and the imaginary part X of impedance play an important role at high frequency and low frequency, respectively. At 1 MHz, the maximum AX/X ratio of 1448% is obtained. At 110 MHz, the maximum AR/R ratio of 648% is obtained.
ISSN:1006-706X
2210-3988