Effect of Isothermal Ageing on Structural and Magnetic Properties of Ni47Mn40Sn13 Ferromagnetic Shape Memory Alloy

Journal of Advanced Materials in Engineering

H. Salamati¹  P. Kameli¹  A. Ghotbi varzaneh¹  F. Karimzadeh² 

[1] 1- Department of Physics, Isfahan University of Technology, Isfahan, Iran;2- Department of Materials Engineering, Isfahan University of Technology, Isfahan, Iran;

关键词: Ferromagnetic shape memory alloy;    Mechanical alloying;    Annealing effect;   

DOI  :  

来源: DOAJ

【 摘 要 】

In this investigation, Ni47Mn40Sn13 ferromagnetic shape memory alloy was prepared by mechanical alloying. The metal powders were ball milled in argon atmosphere for 20 hours. X-ray diffraction pattern confirmed formation of crystalline structure of Heusler alloy. As-milled powder samples were sealed in quartz tubes under high vacuum and subjected to heat treatments at 950°C for different time durations. Then, the effect of isothermal ageing on structural, magnetic and electrical properties of samples was investigated. Results of electrical resistance displayed a metal-like behavior around martensitic transformation. The results showed that 16 hours of annealing was the optimal time for producing this alloy which could be an appropriate candidate for magnetic refrigerant.

【 授权许可】

Unknown