Structural Evolution in Wet Mechanically Alloyed Co-Fe-(Ta,W)-B Alloys

Metals

Miloš Matvija¹  Maksym Lisnichuk²  Daria Yudina²  Vladimír Girman²  Jozef Bednarčík²  Pavol Sovák² 

[1] Institute of Materials and Quality Engineering, Faculty of Materials, Metallurgy and Recycling, Technical University of Košice, Letná 9, 042 00 Košice, Slovakia;Institute of Physics, Faculty of Science, P. J. Šafárik University in Košice, Park Angelinum 9, 041 54 Košice, Slovakia;

关键词: mechanical alloying;    amorphization;    nanocomposite;    local atomic structure;    X-ray scattering;    X-ray absorption spectroscopy;   

DOI  :  10.3390/met11050800

来源: DOAJ

【 摘 要 】

In the present study, the effect of wet mechanical alloying (MA) on the glass-forming ability (GFA) of Co${}_{43}$Fe${}_{20}$X${}_{5.5}$B${}_{31.5}$ (X = Ta, W) alloys was studied. The structural evolution during MA was investigated using high-energy X-ray diffraction, X-ray absorption spectroscopy, high-resolution transmission electron microscopy and magnetic measurements. Pair distribution function and extended X-ray absorption fine structure spectroscopy were used to characterize local atomic structure at various stages of MA. Besides structural changes, the magnetic properties of both compositions were investigated employing a vibrating sample magnetometer and thermomagnetic measurements. It was shown that using hexane as a process control agent during wet MA resulted in the formation of fully amorphous Co-Fe-Ta-B powder material at a shorter milling time (100 h) as compared to dry MA. It has also been shown that substituting Ta with W effectively suppresses GFA. After 100 h of MA of Co-Fe-W-B mixture, a nanocomposite material consisting of amorphous and nanocrystalline bcc-W phase was synthesized.

【 授权许可】

Unknown