A. K. M. Akther Hossain

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Migration behavior of radionuclide is one of the most important factors to be considered for the long-term safety assessment of a radioactive waste disposal facility in a wet geological formation. In the present study, laboratory based column experiments have been carried out to assess the radionuclide migration behavior of ¹³⁷Cs and ⁶⁰Co and to evaluate(More)
The corrosion behavior of heat treated Al-6Si-0.5Mg-xCu (x=0, 0.5 and 1 wt %) alloys in 0.1 M NaCl solution was investigated using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. The potentiodynamic polarization curves reveal that 0.5 wt % Cu and 1 wt % Cu content alloys are less prone to corrosion than the Cu free(More)
A series of polycrystalline spinel ferrites with composition Ni<sub>0.27</sub>Cu<sub>0.10</sub>Zn<sub>0.63</sub>Al<sub>x</sub>Fe<sub>2-x</sub>O<sub>4</sub> for x values ranging from 0.00 to 0.16 in steps of 0.04 and sintered at 1300&#x00B0;C have been prepared and investigated by the standard double sintering ceramic technique. The effect of Al-ion(More)
Effect of 2wt% Cu addition on tensile properties and fracture behavior of Al-6Si-0.5Mg-2Ni alloy at various strain rates were studied. The solution treated Al-6Si-0.5Mg-2Ni (-2Cu) alloys, were aged isochronally for 1 hour at temperatures up to 300C. The uniaxial tension test was carried out at strain rate ranging from 10s to 10s in order to investigate the(More)
The structural and magnetic properties of nanocrystalline Ni<sub>0.50-x</sub>Mn<sub>x</sub>Cu<sub>0.50</sub>Fe<sub>2</sub>O<sub>4</sub> powders were synthesized by combustion technique. Toroid and pellet-shaped samples prepared from these powders were sintered at various temperatures (1150-1300&#x00B0;C). The XRD patterns of various compositions showed well(More)
The Praseodymium, Samarium doped novel Magnesium ferrite (Mg Prx Smy Fe2-x-y O4) was prepared by sol gel route and sintered in a microwave furnace. The nano size, structure and composition of Pr and Sm doped Magnesium ferrite ceramics was analyzed by X-ray diffraction and confirmed by SEM monographs. The elemental conformation was done by EDAX. The(More)
The factors necessary to obtain an optimal heat treatment that influence the hardness and resistivity of Al-6Si-0.5Mg casting alloys with Cu or/and Ni additions were investigated. The alloys were homogenised (24hr at 500C), solutionized (2hr at 540C) and artificially ageing at various times and temperatures. The alloys were aged isochronally for 60 minutes(More)
----------------------------------------------------------ABSTRACT----------------------------------------------------------Solid state reaction method was used to synthesize Ba1-xSrx(Fe0.5Ta0.5)O3 ceramic(x=0, 0.1, 0.2, 0.3, 0.4 and 0.5). The raw materials of making Sr doped Ba(Fe0.5Ta0.5)O3 were BaCO3, SrCO3, Fe2O3, Ta2O5 (purity better than 99%). Pellet(More)
The magnetoelectric composites consisting of ferrite and ferroelectric phases viz. (y)Mn<sub>0.45</sub>Ni<sub>0.05</sub>Zn<sub>0.50</sub>Fe<sub>2</sub>O<sub>4+</sub> (1&#x2122;y)BaZr<sub>0.52</sub>Ti<sub>0.48</sub>O<sub>3</sub> in which y varies from 0.20-0.80 mol% were prepared by standard solid state reaction method. X-ray analysis of these composites(More)
The purpose of this study is to understand the electrochemical corrosion behavior of 1wt% Cu content Al-6Si-0.5Mg alloy in 0.1M NaCl solution. The potentiodynamic polarization curves reveal that 1wt% Cu content alloy is less prone to corrosion than the Cu free alloy. The EIS test results show that corrosion resistance or polarization resistance (Rct)(More)