- BSc. In Physics, MPhil. and Ph.D in material Science, Work in Kuwait institute for Scientific Research, Nanotechnology programedit
Sand particles in the arid areas are an important source of silica and silicon oxide. The study of Micro-features of these particles can provide outstanding information about its history. In addition, it can show the properties of these... more
Sand particles in the arid areas are an important source of silica and silicon oxide. The study of Micro-features of these particles can provide outstanding information about its history. In addition, it can show the properties of these particles. Chemical and Physical properties are considered in analyzing sand samples. This work aims to study the properties of the sand particles in an arid area. Sand particles from different locations within the same wind corridor were chosen to be analyzed. Then, some chemical and physical analysis was performed by using the Scanning Electron Microscope (SEM) and X-ray Fluorescence (XRF). The chemical and the physical study show that some quartz particles tend to be spherical and smooth. The mechanical features of the quartz particles surface mostly occur in the form of dish-shaped depressions, V-shaped pits and crescentic pits, rounded, and upturned plates.
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Research Interests: Materials Science, Metallurgy, Nanocomposite, Cobalt, Metal, and 3 moreOxide, Tungsten Carbide, and Carbide
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Tungsten and the tungsten alloy group materials have a wide range of uses extending from everyday ones, e.g. the coil of an incandescent lamp or the contact tip of an electrical switch or an automobile horn, to components of nuclear... more
Tungsten and the tungsten alloy group materials have a wide range of uses extending from everyday ones, e.g. the coil of an incandescent lamp or the contact tip of an electrical switch or an automobile horn, to components of nuclear fusion reactors or ion drive motors in space probes. The reason for this range of uses lies in the many outstanding properties of tungsten, in particular its high melting point, low vapor pressure, high atomic number, good electrical and thermal conductivity. In the Tungsten–Oxygen system (W–O) there are not only the stoichiometric oxides WO3, WO2.9, WO2.7, WO2, but also non-stoichiometric structures that represent the ordered or partially ordered defect structures of the oxygen-rich oxide in which the central W atom is octahedrally surrounded by six oxygen atoms. In WO3 neighbouring octahedra are in contact only at the corners. With increased oxygen deficiency (reduction, conversion to lower oxides) common edges and surfaces are progressively formed. The aim of this work was to produce a homogeneous powder for recycling from heavy metal swarf. [Continues.]
Research Interests: Materials Science, Sintering, Metallurgy, Alloy, Oxide, and 3 moreTungsten, Stoichiometry, and Melting Point
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Failure Analysis was made on a ruptured low carbon steel pipe that was connected to a natural gas pre-heater in a chemical plant. The pipe has been in service for about 30 years. The analysis indicated that failure of the pipe was due to... more
Failure Analysis was made on a ruptured low carbon steel pipe that was connected to a natural gas pre-heater in a chemical plant. The pipe has been in service for about 30 years. The analysis indicated that failure of the pipe was due to thin-lip rupture, resulting from high temperature sulphidation. The rate of sulphidation was much faster at the
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In the present work, mechanical milling technique using a high-energy ball mill was employed for preparing of nanoscaled WC grains powders with an average grain size of 7 nm in diameters of WC. The present study demonstrates a successful... more
In the present work, mechanical milling technique using a high-energy ball mill was employed for preparing of nanoscaled WC grains powders with an average grain size of 7 nm in diameters of WC. The present study demonstrates a successful consolidation process achieved at 1250 °C for sintering of ball-milled WC powders into full dense bulk buttons (above 99.6%), using SPS technique. The as-consolidated WC bulk nanocrystalline buttons revealed high hardness value (~24 GPa) with low elastic modulus (~332 GPa). Moreover, they possessed a high fracture toughness (15 MPa m1/2) that has never been reported for pure WC.
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A simple photoreduction method was used to deposit Au nanoparticles (Au NPs) at different loadings (0.1–2 Au%) into mixed phase brookite-anatase titanium dioxide (TiO2) nanowires (NWs). X-ray diffraction (XRD) verified that the Au/TiO2... more
A simple photoreduction method was used to deposit Au nanoparticles (Au NPs) at different loadings (0.1–2 Au%) into mixed phase brookite-anatase titanium dioxide (TiO2) nanowires (NWs). X-ray diffraction (XRD) verified that the Au/TiO2 NWs were composed of a mixture of brookite (84.24%) and anatase (15.76%); while transmission electron microscopy (TEM) showed a uniform dispersion of 5- to 10-nm Au NPs over the TiO2 NWs. The photocatalytic performance of the synthesized Au/TiO2 NWs was evaluated for the degradation of resorcinol under UVA illumination. The 0.1% Au/TiO2 NWs photocatalyst offered the best photocatalytic efficiency for resorcinol degradation among the synthesized samples, with the rate, constantly increasing from 0.0014 to 0.003 min−1 after adding 0.1% Au into TiO2 NWs. At Au higher loadings, the rate decreased (0.0005 min−1 for 2% Au/TiO2 photocatalyst. The enhanced activity of the 0.1% Au/TiO2 NWs sample could be ascribed to the effective electron–hole separation at brookite/anatase phase junctions. The Au/TiO2 NWs has maintained good activity over five catalytic test cycles.
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The paper presents the results of a failure investigation carried out on a 52 km long 16″ spiral welded API 5L-X52 fuel supply pipeline. The pipeline supplies liquid fuel from a refinery to a power station. Although there has been a... more
The paper presents the results of a failure investigation carried out on a 52 km long 16″ spiral welded API 5L-X52 fuel supply pipeline. The pipeline supplies liquid fuel from a refinery to a power station. Although there has been a history of external corrosion failures due to coating defects/intermittent cathodic protection problems, a thick wall failure without any indication
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Abstract The influence of particle size (74–210 μm) on compositional, functional, rheological, thermal and pasting properties of two commercial lentil flour samples (Indian and Turkish) was investigated. Reduction of particle size... more
Abstract The influence of particle size (74–210 μm) on compositional, functional, rheological, thermal and pasting properties of two commercial lentil flour samples (Indian and Turkish) was investigated. Reduction of particle size significantly affected the composition of the flour. Turkish lentil flour fractions had higher bulk density (480–600 kg/m3) than Indian one. Particle size did not influence the water holding capacity of flour, however, the process temperature increased those parameters significantly. Instrumental color parameters a and b reduced abruptly and the lightness value, L increased while the particle size was reduced from 210 to 74 μm. Laser diffraction analysis showed bimodal particle size distributions of lentil flour. Two distinct thermal transitions exhibited by lentil samples and the glass transition temperature varied among samples. Non-isothermal heating of lentil particle dispersions demonstrated a gradual decrease in the peak complex viscosity with decreasing particle size. Pasting parameters and micrographs of lentil fractions showed a significant difference between two samples. The obtained results could be useful for the food industry to manufacture lentil-based food products with a defined particle size to obtain desirable functional and rheological characteristics.
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AbstractIn this study, the effect of chemical pretreatment with powdered activated carbon (PAC), ferric chloride, and aluminum chloride at the different concentrations of 10, 30, and 60 ppm on the silt density index (SDI) value of... more
AbstractIn this study, the effect of chemical pretreatment with powdered activated carbon (PAC), ferric chloride, and aluminum chloride at the different concentrations of 10, 30, and 60 ppm on the silt density index (SDI) value of brackish water was examined. Generally, PAC pretreatment was found to be the best pretreatment method. Pretreatment with 10 ppm of PAC resulted in the lowest SDI value of 3.5, which is approximately 44.4% lower than untreated brackish water. After pretreatment with PAC, scanning electron microscopy (SEM) of the filter surface showed large graphite-like particles. An intermediate blocking mechanism produced the best fit for the filtration data from PAC pretreatment. The SEM images of the filter surface show a thick cake layer formation in the aluminum chloride and ferric chloride pretreatments. The cake filtration blocking mechanism was the best fit for brackish water treated with aluminum chloride and ferric chloride.
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The paper presents the results of a failure investigation carried out on a 52 km long 16″ spiral welded API 5L-X52 fuel supply pipeline. The pipeline supplies liquid fuel from a refinery to a power station. Although there has been a... more
The paper presents the results of a failure investigation carried out on a 52 km long 16″ spiral welded API 5L-X52 fuel supply pipeline. The pipeline supplies liquid fuel from a refinery to a power station. Although there has been a history of external corrosion failures due to coating defects/intermittent cathodic protection problems, a thick wall failure without any indication
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Failure Analysis was made on a ruptured low carbon steel pipe that was connected to a natural gas pre-heater in a chemical plant. The pipe has been in service for about 30 years. The analysis indicated that failure of the pipe was due to... more
Failure Analysis was made on a ruptured low carbon steel pipe that was connected to a natural gas pre-heater in a chemical plant. The pipe has been in service for about 30 years. The analysis indicated that failure of the pipe was due to thin-lip rupture, resulting from high temperature sulphidation. The rate of sulphidation was much faster at the
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A total of 212 sand samples were collected from aeolian surface sediments in a major dune corridor, northwestern Kuwait. Five main physical properties were taken into consideration in analyzing aeolian samples, namely color, shape,... more
A total of 212 sand samples were collected from aeolian surface sediments in a major dune corridor, northwestern Kuwait. Five main physical properties were taken into consideration in analyzing aeolian samples, namely color, shape, roundness, particle morphometry, and surface area. The analysis of quartz particles by the scanning electron microscope shows the influence of transportation on the microfeatures of individual
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Tungsten and the tungsten alloy group materials have a wide range of uses extending from everyday ones, e.g. the coil of an incandescent lamp or the contact tip of an electrical switch or an automobile horn, to components of nuclear... more
Tungsten and the tungsten alloy group materials have a wide range of uses extending from everyday ones, e.g. the coil of an incandescent lamp or the contact tip of an electrical switch or an automobile horn, to components of nuclear fusion reactors or ion drive motors in space probes. The reason for this range of uses lies in the many outstanding properties of tungsten, in particular its high melting point, low vapor pressure, high atomic number, good electrical and thermal conductivity. In the Tungsten–Oxygen system (W–O) there are not only the stoichiometric oxides WO3, WO2.9, WO2.7, WO2, but also non-stoichiometric structures that represent the ordered or partially ordered defect structures of the oxygen-rich oxide in which the central W atom is octahedrally surrounded by six oxygen atoms. In WO3 neighbouring octahedra are in contact only at the corners. With increased oxygen deficiency (reduction, conversion to lower oxides) common edges and surfaces are progressively formed. Th...
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Failure Analysis was made on a ruptured low carbon steel pipe that was connected to a natural gas pre-heater in a chemical plant. The pipe has been in service for about 30 years. The analysis indicated that failure of the pipe was due to... more
Failure Analysis was made on a ruptured low carbon steel pipe that was connected to a natural gas pre-heater in a chemical plant. The pipe has been in service for about 30 years. The analysis indicated that failure of the pipe was due to thin-lip rupture, resulting from high temperature sulphidation. The rate of sulphidation was much faster at the
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A single phase of NaCl-type TiC was obtained after 5 h of ball milling. To decrease the powder and grain sizes, the synthesized material was subjected to further ball milling time. The powders obtained after 200 h of milling possessed... more
A single phase of NaCl-type TiC was obtained after 5 h of ball milling. To decrease the powder and grain sizes, the synthesized material was subjected to further ball milling time. The powders obtained after 200 h of milling possessed spherical-like morphology with average particle and grain sizes of 45 m and 4.2 nm,respectively. The end-products obtained after 200 h of ball milling time, were then consolidated into full dense compacts, using hot pressing and spark plasma sintering at 1500 and 34.5 MPa, with heating rates of 20 oC/min and 500 oC/min, respectively. Whereas hot pressing of the powders led to severe grain growth (~436 nm in diameter), the as-spark plasma sintered powders maintained their nanograined characteristics (~28 nm in diameter). The as-synthesized and as-consolidated powders were characterized, using X-ray diffraction, high-resolution electron microscope, and scanning electron microscope. The mechanical properties of the consolidated samples obtained via the h...
A high-energy ball milling technique was employed to prepare ultrafine cemented carbide nanocomposite powders with compositions (wt.%) of 93WC/7-xCo/xZrO2-2mol% Y2O3 powders (x=0, 1, 2, 3, 4, 5, 6, 7 wt%). The nanocomposite powders... more
A high-energy ball milling technique was employed to prepare ultrafine cemented carbide nanocomposite powders with compositions (wt.%) of 93WC/7-xCo/xZrO2-2mol% Y2O3 powders (x=0, 1, 2, 3, 4, 5, 6, 7 wt%). The nanocomposite powders obtained after 75 h of ball milling possessed excellent morphological characteristics with spherical morphology and an average particle size of 150 nm in diameter. The powder of the end-productswere then consolidated in vacuum under a uniaxial pressure of 30 MPa at 1250 °C using spark plasma sintering. The fully dense nanocomposite bulk samples obtained via the SPS process maintain their nanocrystalline structure.The indentation fracture toughness (Kc1) of the bulk consolidated were investigated as a function of ZrO2 content.
In contrast to the industrial approach for preparing such important materials, we have succeeded to synthesize a single phase of Ti50C50 nanopowders, using high-energy ball milling technique. The ball milling procedure took place at... more
In contrast to the industrial approach for preparing such important materials, we have succeeded to synthesize a single phase of Ti50C50 nanopowders, using high-energy ball milling technique. The ball milling procedure took place at ambient temperature in an argon gas atmosphere. The end-product that obtained after 200h of ball milling was consolidated into full dense nanocrystalline compacts, using spark plasma sintering (SPS) technique. The synthesized nanopowders and their consolidated bulk materials were characterized by X-ray diffraction (XRD), high resolution transmission electron microscope/energy dispersive X-Ray spectrometer (HRTEM/EDS), field emission scanning electron microscope (FESEM) and electron probe micro analyzer electron microscope/EDS (EPMA/EDS). The micro-and nano-hardness together with microfracture- and nanofracture toughness of the consolidated samples were investigated by Vickers hardness (VH) tester and nanoindenter (400mN), respectively. Nanoindention appr...
The marine fish are extraordinarily nourishing food and are affluently accessible fish meat source. Fresh examined sample of grouper fish was collected from Mudasal odai fish landing center. The protein, carbohydrate, lipid, ash and... more
The marine fish are extraordinarily nourishing food and are affluently accessible fish meat source. Fresh examined sample of grouper fish was collected from Mudasal odai fish landing center. The protein, carbohydrate, lipid, ash and moisture contents of Epinephelus coioides were found to be 19.07 mg, 4.03, 2.61, 77.38 mg and 1.21 mg/g respectively. The potassium and phosphorus are the predominant elements other nine components are present in considerable quantities in the total of 11 minerals. Palmitic acid, Oleic acid and Stearic acid were observed to be the major elements of total presented 15 fatty acids. In this current study we have concluded the grouper fish having rich source of protein and good fatty acids and it will facilitate to enhance the nutrition level on poor folks