Giant Stress-Impedance Effect in Co_(71.8)Fe_( 4.9)Nb_(0.8)Si_(7.5)B_(15) Glass-Covered Amorphous Wires

作     者：CHEN Zheng LI De-ren LU Zhi-chao ZHOU Shao-xiong 

作者机构：Nanomaterials Engineering and Research Center Central Iron and Steel Research Institute Beijing 100081 China Research and Development Center Advanced Technology and Materials Co Ltd Beijing 100081 China 

出 版 物：《Journal of Iron and Steel Research International》 (国际钢铁研究杂志)

年 卷 期：2006年第13卷第4期

页      面：49-50,74页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：ItemSponsoredbyNationalHighTechResearchandDevelopmentProgram(2002AA302601)andNationalKeyTechnologiesResearchandDevelopmentProgram(2004BA310A51) 

主　　题：giant stress-impedance amorphous wire DC annealing 

摘      要：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.