Structural characterization of iron-based bulk metallic glass alloys produced by centrifugal casting

Akdeniz, Mahmut Vedat
BOR, A Sakir
In this study bulk metallic glass alloys in the Fe-Zr-B-M (M=Al, Co, Cu, Mo, Ni, W) systemwere produced by using a centrifugal casting method. The thickness ofthe samples that could be produced with an almost completely amorphousstructure was found to be as high as similar to2 mm for alloy Fe60Co8Zr10Mo5W2B15. Alloying element additions or replacements have resulted in a considerable effect on glass-forming ability. Among others, Al and Cu were found to have the most deteriorative effects. The ternary alloy Fe70Zr10B20, from which bulk metallic glass alloys can be formed by cleverly implementing several alloying elements, was seen to have a different phase transformation behavior when compared to alloy Fe60Co8Zr10Mo5W2B15. For the latter alloy, the phase transformation process and microstructure evolution were found to be extremely sensitive to variation of the cooling rate.


Glass Forming Ability and Magnetic Properties of Fe36Ni36B19.2Si4.8Nb4-xMx (M = Cu, Zr, Ti, Y, Pt) Bulk Glassy Alloys Fabricated by Suction Casting
Kirimli, Handan Engin; Sarlar, Kagan; Konuk, A. Oguz; DUMAN, Nagehan; Akdeniz, Mahmut Vedat; Kucuk, Ilker (2013-05-01)
In this study, the effects of Cu, Zr, Ti, Y, Pt substitution for Nb additions on the stability and magnetic properties of Fe-Ni-based bulk metallic glass (BMG) alloys fabricated by the suction casting method are investigated. The saturation magnetization (J(s)) and coercivity (H-c) for as-cast Fe36Ni36B19.2Si4.8Nb4-xMx (M = Cu, Ti) BMG alloys were in the range of 0.51 T-0.55 T and 76-779 A/m, respectively. Differential scanning calorimetry curves show that the Fe36Ni36B19.2Si4.8Nb4-xMx (M = Cu, Ti) bulk met...
Magnetic monitoring approach to nanocrystallization kinetics in Fe-based bulk amorphous alloy
Duman, Nagehan; Akdeniz, Mahmut Vedat; Mehrabov, Amdulla (2013-12-01)
Much of the recent metallic glass research is devoted to controlling the crystallization of amorphous precursors with the purpose of obtaining amorphous matrix nanocrystalline alloys which combine unmatched soft magnetic properties with good mechanical properties. Therefore, it is crucial to have better understanding of crystallization mechanisms and thermal dependence of nanocrystals that are formed by annealing. This study deals with the nanociystallization kinetics of Cu-modified Fe-Co-Ni-B-Si-Nb bulk am...
Structural, electrochemical and optical comparisons of tungsten oxide coatings derived from tungsten powder-based sols
Isik, Dilek; AK, METİN; Durucan, Caner (Elsevier BV, 2009-11-02)
Tungsten trioxide (WO3) electrochromic coatings have been formed on indium tin oxide-coated glass substrates by aqueous routes. Coating sols are obtained by dissolving tungsten powder in acetylated (APTA) or plain peroxotungstic acid (PTA) solutions. The structural evolution and electrochromic performance of the coatings as a function of calcination temperature (250 degrees C and 400 degrees C) have been reported. Differential scanning calorimetry and X-ray diffraction have shown that amorphous WO3 films ar...
Structural characteristics of thermally evaporated Cu0.5Ag0.5InSe2 thin films
Gullu, H. H.; Parlak, Mehmet (2016-05-01)
In this work, Cu0.5Ag0.5InSe2 (CAIS) thin film samples were prepared by thermal evaporation of Cu, Ag, InSe and Se evaporants sequentially on glass substrates. Following the deposition, annealing processes were applied at different temperatures. The as-grown and annealed CAIS samples were nearly stoichiometric in the detection limit of the compositional measurement. The x-ray diffraction (XRD) measurements revealed that they were in polycrystalline structure with a preferred orientation along the (112) dire...
Simulation of crystallization and glass formation processes for binary Pd-Ag metal alloys
Kart, HH; Uludogan, M; Cagin, T; Tomak, Mehmet (2003-09-12)
Glass formation and crystallization process of Pd-Ag metallic alloys are investigated by means of molecular dynamics simulation. This simulation uses the quantum Sutton-Chen (Q-SC) potential to study structural and transport properties of Pd-Ag alloys. Cooling rates and concentration effects on the glass formation and crystallization of binary alloys considered in this work are investigated. Pd-Ag alloys show the glass structure at fast cooling rates while it crystallizes at slow cooling rates. Increment of...
Citation Formats
M. PEHLIVANOGLU, M. V. Akdeniz, and A. S. BOR, “Structural characterization of iron-based bulk metallic glass alloys produced by centrifugal casting,” CHEMICAL ENGINEERING COMMUNICATIONS, pp. 925–935, 2003, Accessed: 00, 2020. [Online]. Available: