Deren LI
,
Zhichao LU
,
Wei HAN
,
Shaoxiong ZHOU
,
Zhen GAO
,
Junfeng ZHANG
,
Hui LIU
材料科学技术（英文）
The giant stress-impedance (GSI) effect in amorphous and current annealed Fe73.5Cu1Nb3Si13.5B9 ribbons has been investigated. The results showed that the GSI effect changed drastically with annealing techniques and the maximum stress impedance ratio of 350% was obtained after optimal conditions of current annealing. The behaviors of the stress impedance vary with densities of annealing current and the stress longitudinally applied during currentannealing. The maximum change of stress impedance existed in the sample annealed by high-current-density electropulsing under applied stress of 100 MPa.
关键词:
Amorphous ribbon
,
null
,
null
,
null
,
null
Peng CAO
,
Milin ZHANG
,
Wei HAN
,
Yongde YAN
,
Lijun CHEN
金属学报(英文版)
Electrochemical behavior of Mg, Li and Sn on tungsten electrodes in LiCl-KCl-MgCl2-SnCl2 melts at 873 K was investigated. Cyclic voltammograms (CVs) showed that the underpotential deposition (UPD) of magnesium on pre--deposited tin leads to the formation of a Mg-Sn alloy, and the succeeding underpotential deposition of lithium on pre-deposited Mg-Sn alloy leads to the formation of a Mg-Li-Sn alloy. Chronopotentiometric measurements indicated that the codepositon of Mg, Li and Sn occurs at current densities more negative than -1.16 A·cm - 2. X-ray diffraction (XRD) indicated that Mg2Sn phase is formed via galvanostatic electrolysis. The element Mg distributes homogeneously and Sn locates mainly on the grain boundaries in the Mg-Li-Sn alloy.
关键词:
Mg-Li-Sn alloy
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null
,
null
,
null
Zhichao LU
,
Wei HAN
,
Deren LI
材料科学技术（英文）
The total ribbon voltage of as-quenched and annealed Fe96-xZrxB4 (x=7 or 10) ribbons has been measured as a function of applied de field and drive current frequency. The experimental results show that both samples exist the optimum annealing temperature and optimum frequency at which the relative change in ribbon voltage is strongest, and the sensitivity of the magnetic response of the annealed Fe89Zr7B4 ribbon is two order of magnitude larger than that of the annealed Fe86Zr10B4 ribbon. The effect of magnetic properties and structural characteristics on giant magneto-impedance was discussed.
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