Sharif Digital Repository

Advanced isoconversional kinetics of nanocrystallization in Fe73.5Si13.5B9Nb3Cu 1 alloy

Author

Asghari Shivaee, H.

Pub. Year

2009

Subjects

Finemet alloy. / Isoconversional kinetics. / Nanocrystallization. / Advanced isoconversional method. / Amorphous finemet alloys. / Calorimetery. / Diffusion mechanisms. / Experimental kinetics. / Flynn-Wall-Ozawa. / Iso-conversional method. / Kinetic exponent. / Kinetic functions. / Kissinger. / Kissinger methods. / Kissinger model. / Mean values. / Nanocrystallization kinetics. / Non-isothermal condition. / Numerical reconstruction. / Numerical values. / One-dimensional growth. / Alloys. / Cerium alloys. / Differential scanning calorimetry. / Polymer blends. / X ray diffraction. / X ray diffraction analysis. / Activation energy.

The dependency of optical properties on density for hot pressed MgF2

Author

Nofar, M.

Pub. Year

2008

Subjects

Absorption. / Building materials. / Magnesium. / Magnesium compounds. / Optical materials. / Optical properties. / Transparency. / Cold pressings. / Continuous. / Hot presses. / Incident radiations. / Infrared transparencies. / Infrared wavelengths. / Infrared windows. / Magnesium fluoride. / Pressing times. / Hot pressing.

Structural and magnetic study of active screen plasma nitrided Fe 73.5Si13.5B9Nb3Cu1and Fe77Si11B9Nb2.4Cu0.6 ribbons

Author

Memarzadeh Lotfabad, E.

Pub. Year

2010

Subjects

Active screen plasma nitriding. / Fe-Si-Nb-B-Cu alloys. / Active screen plasma. / Coercivities. / Comparative studies. / Crystalline volume fraction. / Crystallization temperature. / Cu alloy. / Finemet type alloys. / Grain size. / Growth inhibitor. / Iron nitrides. / Magnetic characterization. / Magnetic studies. / Microhardness measurement. / Nitrided. / SEM. / Si content. / Vibrating sample magnetometer. / XRD. / Atomic force microscopy. / Copper alloys. / Differential scanning calorimetry. / Electric conductivity. / Grain size and shape. / Iron alloys. / Nitrides. / Nitriding. / Nitrogen plasma. / Plasma applications. / Saturation magnetization. / Ultrahigh molecular weight polyethylenes. / Silicon alloys. / Alloy. / Boron. / Calorimetry. / Comparative study. / Copper. / Crystallization. / Iron. / Niobium. / Plasma. / Scanning electron microscopy. / Silicon.

Influence of annealing on the electrochemical behavior of finemet amorphous and nanocrystalline alloy

Author

Asghari Shivaee, H.

Pub. Year

2010

Subjects

Amorphous and nanocrystalline alloys. / Amorphous samples. / Annealed samples. / Before and after. / Charge transfer resistance. / Corrosion behavior. / Corrosion potentials. / Electrochemical behaviors. / Electrochemical corrosion behavior. / Finemet. / Finemet alloys. / Heat treatment temperature. / NaOH solutions. / Optical microscopes. / Positive shift. / Structural change. / Thermal behaviors. / X ray diffractometry. / Amorphous alloys. / Cerium alloys. / Charge transfer. / Corrosion rate. / Corrosion resistance. / Corrosive effects. / Differential scanning calorimetry. / Electrochemical corrosion. / Electrochemical impedance spectroscopy. / Heat resistance. / Heat treatment. / Ion exchange. / Mass transfer. / X ray diffraction analysis. / Nanocrystalline alloys.

Nanocrystallization kinetics and magnetic properties of the melt spun amorphous (Fe0.5Co0.5)77Si11B 9Cu0.6Nb2.4 alloy

Author

Shivaee, H. A.

Pub. Year

2014

Subjects

Cobalt-Finemet alloys. / Nano-crystallization. / Crystallization mechanisms. / Experimental kinetics. / Hysteresis loss value. / Isoconversional kinetics. / Kinetics of crystallization. / Magnetic coercivities. / Alloys. / Amorphous silicon. / Cerium alloys. / Coercive force. / Differential scanning calorimetry. / Hysteresis. / Niobium. / Silicon. / Kinetics.

Study of nanocrystallization in FINEMET alloy by active screen plasma nitriding

Author

Shivaee, H. A.

Pub. Year

2010

Subjects

Active screen plasma nitriding. / FINEMET alloy. / Nanocrystallization. / Amorphous ribbon. / Coercivities. / Crystalline volume fraction. / Electrical and magnetic property. / Electrical resistivity. / Finemet alloys. / Finer grains. / Lattice parameters. / Microhardness measurement. / Nano-crystallization process. / Saturated magnetization. / Si atoms. / Structural feature. / Two-gas mixtures. / Vibrating sample magnetometer. / Atomic force microscopy. / Crystal atomic structure. / Differential scanning calorimetry. / Electric conductivity. / Electric network analysis. / Gas mixtures. / Iron alloys. / Magnetic properties. / Mechanical properties. / Microhardness. / Nitriding. / Plasmas. / Silicon. / Silicon alloys. / Surface treatment. / Ultrahigh molecular weight polyethylenes. / X ray diffraction. / Plasma applications.

Producing ultrafine-grained aluminum rods by cyclic forward-backward extrusion: Study the microstructures and mechanical properties

Author

Alihosseini, H.

Pub. Year

2012

Subjects

TEM. / Ultrafine grained rods. / Aluminum rods. / Average grain size. / EBSD. / Electron back scatter diffraction. / Elongation to break. / Microstructures and mechanical properties. / Severe plastic deformations. / Transmission electron microscopy (TEM) / Ultrafine-grained. / Aluminum. / Grain refinement. / Grain size and shape. / Mechanical properties. / Plastic deformation. / Aluminum alloys.

A thermoelasticity solution of sandwich structures with functionally graded coating

Author

Shodja, H. M.

Pub. Year

2007

Subjects

Fourier transforms. / Functionally graded materials. / Heat convection. / Partial differential equations. / Poisson ratio. / Stress concentration. / Thermoelasticity. / Thermomechanical treatment. / Fourth order inhomogeneous. / Stress function. / Sandwich structures. / Coatings. / Composite. / Composite property. / Elasticity. / Heat transfer. / Interfacial property. / Mathematical analysis. / Shear property. / Stress. / Thermal property.

Effects of chemical composition on nanocrystallization kinetics, microstructure and magnetic properties of finemet-type amorphous alloys

Author

Shivaee, H. A.

Pub. Year

2013

Subjects

Amorphous materials. / Crystallization. / Grain growth. / Magnetic properties. / Thermal analysis.

The effects of thickness on magnetic properties of FeCuNbSiB sputtered thin films

Author

Shivaee, H. A.

Pub. Year

2017

Subjects

Copper compounds. / Iron compounds. / Magnetic properties. / Magnetism. / Magnetometers. / Nanoindentation. / Niobium compounds. / Residual stresses. / Silicon compounds. / Sputtering. / Thin films. / As-deposited films. / Effects of thickness. / Gradient fields. / Ion sputtering. / Nanoindentation experiments. / Rf-sputtering. / Sputtered thin films. / Vibrating sample magnetometer. / Boron compounds. / Boron. / Copper. / Experiment. / Film. / Instrumentation. / Iron. / Magnetic property. / Niobium. / Silicon.

In vitro study of bare and poly (ethylene glycol)-co-fumarate coated superparamagnetic iron oxide nanoparticles for reducing potential risks to humans and the environment

Author

Mahmoudi, M.

Publisher

Nova Science Publishers, Inc,

Pub. Year

2011

Subjects

Biocompatibility. / Magnetic nanoparticles. / MTT assay. / Poly (ethylene glycol)-co-fumarate.

A nonlinear Timoshenko beam formulation based on the modified couple stress theory

Author

Asghari, M.

Pub. Year

2010

Subjects

Non-classic continuum theories. / Timoshenko beam. / Classical continuum theory. / Continuum theory. / Couple stress. / Couple stress theory. / Free vibration. / Free vibration behavior. / Hamilton principle. / Method of multiple scale. / New model. / Nonlinear behavior. / Size effects. / Static bending. / Timoshenko beam model. / Timoshenko beams. / Boundary conditions. / Continuum mechanics. / Nonlinear analysis. / Particle beams. / Vibration analysis. / Perturbation techniques.

A new analytical approximation to the Duffing-harmonic oscillator

Author

Fesanghary, M.

Pub. Year

2009

Subjects

Analytical approximation. / Analytical results. / Harmonic oscillators. / Oscillation amplitude. / Variational iteration method. / Oscillators (mechanical) / Oscillators (electronic)

Trajectory planning of spine motion during flexion using a stability-based optimization

Author

Khorsand Vakilzadeh, M.

Pub. Year

2010

Subjects

Nonlinear optimization. / Minimum-jerk model. / Minimum-torque change model. / Non-linear optimization. / Spine. / Trajectory planning. / Biomechanics. / Design. / Muscle. / Systems analysis. / Trajectories. / Optimization.

Machine learning modeling for spectral transient-based leak detection

Author

Asghari, V.

Publisher

Elsevier B.V,

Pub. Year

2023

Subjects

CatBoost. / Hydraulic systems. / Machine learning. / Transient-based leak detection. / Water hammer.

Investigation of the size effects in Timoshenko beams based on the couple stress theory

Author

Asghari, M.

Pub. Year

2011

Subjects

Analytical results. / Axial deformations. / Beam thickness. / Bending deflection. / Characteristic size. / Classical beam theory. / Classical continuum theory. / Closed form. / Closed-form analytical solutions. / Concentrated force. / Continuum theory. / Couple stress theory. / Cross section. / Euler-Bernoulli. / Free end. / Governing differential equations. / Material length scale. / Material length scale parameter. / Mechanical behavior. / Rotation angles. / Size effects. / Size-dependent behavior. / Static loading. / Timoshenko beam. / Timoshenko beam theory. / Bending (deformation) / Bending (forming) / Boundary conditions. / Continuum mechanics. / Equations of motion. / Mechanical engineering. / Particle beams. / Stresses.

The modified couple stress functionally graded Timoshenko beam formulation

Author

Asghari, M.

Pub. Year

2011

Subjects

E. Mechanical properties. / F. Elastic behavior. / A. Functionally graded materials. / Analytic expressions. / Beam properties. / Classical continuum theory. / Closed form. / Continuum theory. / Couple stress. / Couple stress theory. / E. Mechanical. / F. Elastic behavior. / Free vibration. / Functionally graded. / Governing differential equations. / Mechanical behavior. / New model. / Power law. / Scale sizes. / Simply supported beams. / Static response. / Timoshenko beams. / Beams and girders. / Continuum mechanics. / Equations of motion. / Fracture. / Mechanical properties. / Particle beams. / Stresses. / Functionally graded materials.

Static pull-in analysis of microcantilevers based on the modified couple stress theory

Author

Rahaeifard, M.

Pub. Year

2011

Subjects

1-Static pull-in. / 2-Modified couple stress theory. / 3-Size effects. / Classical theory. / Continuum theory. / Couple stress theory. / Experimental observation. / Micro-cantilevers. / Pull-in. / Pull-in voltage. / Size effects. / Submicron scale. / Continuum mechanics. / Composite micromechanics.

A size-dependent nonlinear Timoshenko microbeam model based on the strain gradient theory

Author

Asghari, M.

Pub. Year

2012

Subjects

Free vibration behavior. / Geometrically nonlinear. / Governing differential equations. / Large deflection. / Mechanical analysis. / Micro beams. / Model-based OPC. / Nonlinear statics. / Strain gradient theory. / Variational approaches. / Equations of motion. / Boundary conditions.