Surface microstructural design to improve mechanical and giant magneto-impedance properties of melt-extracted CoFe-based amorphous wires

Materials & Design

Diana Estevez¹  Huan Wang²  Yongjiang Huang³  Lunyong Zhang³  Zhiliang Ning⁴  Hongxian Shen⁴  Faxiang Qin⁴  Jianfei Sun⁴  Sida Jiang⁵ 

[1] Corresponding author at: Space Environment Simulation Research Infrastructure, Harbin Institute of Technology, Harbin 150001, China.;School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;Institute for Composites Science and Innovation, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China;School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;Space Environment Simulation Research Infrastructure, Harbin Institute of Technology, Harbin 150001, China;

关键词: Amorphous wire;    Surface microstructural regulation;    Domain structure;    Mechanical property;    Giant magneto-impedance;   

DOI  :  

来源: DOAJ

【 摘 要 】

The influence of surface microstructural regulation mechanisms on the mechanical and giant magneto-impedance (GMI) properties of as-cast melt-extracted CoFe-based wires has been systematically researched based on morphology, phase distribution and domain structure parameters. A series of statistical models were applied to analyze the mechanical properties and followed by mapping the curve of cumulative failure rate for wire application. It was found that the average and highest fracture strengths, average tensile strain increased with Cu substitution and reached peaks of ~3725 MPa, ~4250 MPa and ~2.7%, respectively. Verified structure-simulation experiments revealed that surface Rayleigh waves effectively split the main crack and the diffusely distributed nanocrystalline in surface area acted as a pinning point to impede the crack growth, enhancing the mechanical properties. The GMI ratio displayed similar variations and attained a maximum value of 700 ± 5% as well as the resistance and reactance ratios improved to ~687% and ~2206%, respectively. The enhanced relative dielectric permeability μs resulting from the increased domain wall energy density and the decreased surface domain width. The unique synchronous enhancement of CoFe-based wires satisfies the demand for emerging magnetoelectric sensor applications, e.g. flexible and wearable sensors, equipment self-monitoring sensors, and array robotic skin sensors under harsh working environments.

【 授权许可】

Unknown