Mohd. Mustafa Al Bakri Abdullah
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Preferred name
Mohd. Mustafa Al Bakri Abdullah
Official Name
Abdulah, Mohd. Mustafa Al Bakri
Alternative Name
Abdullah, M.M.A.
M.M.A. Abdullah
Mustafa Al Bakri, A. M.
Albakri Abdullah, M. M.
Main Affiliation
CeGeoGTech UniMAP
Scopus Author ID
53164519100

Research Output
Now showing 1 - 2 of 2
  • Publication
    The influence of heat treatment on the magnetic properties of the alloy Fe62Co10Y8B20 produced by the injection suction casting method
    (Jagiellonian University, 2020)
    M. Talar
    ;
    J. Gondro
    ;
    P. Vizureanu
    ;
    Mohd. Mustafa Al Bakri Abdullah
    ;
    K. BÅ‚och
    The paper presents studies of annealing effect on the magnetic properties of the bulk Fe62Co10Y8B20alloy in the form of rods. The thermal treatment was performed at the temperature well below the crystallization temperature. Structure, revealed by X-ray diffraction and Mössbauer spectroscopy and magnetic properties in high magnetic fields in the Fe62Co10Y8B20alloy after fabricated and after the annealing were studied. We have stated that the investigated alloy was fully amorphous. It is due to the stress relieving of the sample. Using a vibrating sample magnetometer the magnetization in high magnetic fields was studied. For both the sample after solidification and after heat treatment, the magnetization process in the area called "the approach to ferromagnetic saturation" is affected by free volumes. In addition, the heat treatment improved the magnetic properties and increased the packing density of atoms.
  • Publication
    Influence of Co and Zr content on creation of Crystalline phases in rapidly-cooled, injection-cast alloys Fe70Zr8-xCoxNb2B20 (where x=0, 2, 4, 6 or 8)
    (Jagiellonian University, 2020)
    M. Nabiałek
    ;
    S. Walters
    ;
    P. Vizureanu
    ;
    Mohd. Mustafa Al Bakri Abdullah
    ;
    B. Jeż
    Rapid solidification techniques allow the manufacture of nanocrystalline alloys using a single-stage production process. There is an issue with the reproducibility of this process. However, careful selection of the chemical composition of the alloy allows a degree of control over the process. This paper presents the results of investigations into the structure and magnetic properties of rapidly-quenched alloys based on Fe. For these investigations, alloys with the compositions of Fe70Zr8-xCoxNb2B20(where x = 0, 2, 4, 6, or 8) were selected. The alloys were made using an injection-casting method. The structure of the obtained alloys was investigated using X-ray diffractometry. Utilising dedicated software, the crystalline phases within the volume of the samples were identified - as the magnetic phases of Fe23B6, αFe, and Fe2B. The magnetic properties of the produced alloys were determined on the basis of measurements of the magnetic polarisation curves as a function of temperature, and the static hysteresis loops. The thermomagnetic curves confirmed the existence of the Fe23B6phase within the volume of two samples. The values of the saturation magnetisation and coercive field were determined from the static hysteresis loops. The alloys in which the presence of the Fe23B6phase was detected (alloy compositions Fe70Zr4Co4Nb2B20and Fe70Zr2Co6Nb2B20) were found to exhibit soft magnetic properties. A progressive decline in the presence of the Fe2B phase within the investigated alloys was observed with increasing Co content (at the expense of Zr content). On the basis of the performed investigations, the major influence of the Co and Zr content on the creation process of the crystalline phases, during the rapid solidification process was confirmed.
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