18 Result(s)
within
H.-C. Kim
Solid Mechanics
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Article
Rapid sintering of ultra-fine WC-10 wt% Co by high-frequency induction heating
High-frequency induction-heated sintering (HFIHS) is utilized to consolidate ultra-fine grain WC-10 wt% Co. Densification to near theoretical density in a relatively short time can be accomplished with insigni...
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Article
One step synthesis and consolidation of WC-10 vol.% Co hard material
Dense WC-10 vol.%Co composite was simultaneously synthesized with field-activated and pressure-assisted combustion synthesis (FAPACS) within several minutes in one step from elemental powders of W, C and Co. C...
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Article
Simultaneous synthesis and densification of WSi2 and WSi2-20vol.%Nb composite by field-activated and pressure-assisted combustion
A method to simultaneously synthesize and consolidate the silicide WSi2 and the composite WSi2-20 vol.%Nb from W, Si, and Nb powders was investigated. Combustion synthesis was carried out under the combined effec...
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Article
Simultaneous synthesis and densification of MoSi2-20vol.%Nb composite and MoSi2-20vol.%ZrO2 composite by field-activated and pressure-assisted combustion
A method to simultaneously synthesize and consolidate MoSi2-20vol.%Nb composite and MoSi2-20vol.% ZrO2 composite from powders of Mo, Si, Nb and ZrO2 was investigated. Combustion synthesis was carded out under com...
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Article
Effect of microstructural inhomogeneities on the evolution of texture during rolling and recrystallization of copper
Microstructural inhomogeneities in polycrystalline copper was intentionally varied by the deformation at the liquid nitrogen temperature and the rolling without lubrication. The effect of different rolling con...
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Article
Evaluation of thermal recovery of neutron-irradiated SA508-3 steel using magnetic property measurements
The Vickers microhardness and magnetic properties have been used to investigate irradiation effects and thermal recovery characteristics of neutron-irradiated SA508-3 reactor pressure vessel steel specimens ir...
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Article
Electrical properties of cement paste obtained from impedance spectroscopy
The impedance spectra of hydrating Portland cement paste showed a small part of a large depressed arc and a single depressed arc at low- and high-frequency regions, respectively. A new equivalent circuit was p...
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Article
Three-dimensional analysis of modulated photoreflectance in a silicon wafer
The effects of probe and pum** beam size and modulation frequency on photoreflectance were investigated for a silicon wafer by considering one- and three-dimensional generation and propagation of thermal and...
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Article
Three-dimensional electrical percolation behaviour in conductive short-fibre composites
The percolation behaviour and electrical conductivity in unidirectional composites made of short conductive fibres embedded in an insulating matrix were examined by Monte Carlo simulation as a function of aspe...
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Article
The stress dependence of Barkhausen noise in Fe81B13.5Si3.5C2 Metglas
The Barkhausen noise (BN) profile of Fe81B13.5Si3.5C2 Metglas changes from single to double peaks with applied tensile stress. The second harmonics during the magnetization process under various stresses confirm ...
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Article
Dielectric spectra of fresh cement paste below freezing point using an insulated electrode
The spectra of complex dielectric constant were measured on a fresh cement paste with a water/cement ratio of 0.4 sandwiched between insulated electrodes in the frequency range 10 kHz–1 MHz and temperature ran...
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Article
Corrosion and wear characteristics of pulse-plated chromium deposits
Corrosion and wear characteristics of pulse-plated chromium deposits, obtained from a self-regulating highspeed (SRHS) bath have been studied as a function of pulse current parameters such as duty cycle, avera...
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Article
Ultrasonic measurements during early-stage hydration of ordinary Portland cement
The variations of ultrasonic pulse velocity, peak amplitude of transmitted pulse and heat evolution rate were measured during the hydration process of ordinary Portland cement with water/cement ratio (W/C rati...
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Article
Ultrasonic wave propagation in carbon fibre-reinforced plastics
The attenuation and velocity of the longitudinal and shear waves in unidirectional carbon/epoxy composites have been measured as a function of the fibre volume fraction over the frequency range, 1.84 to 11.9 M...
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Article
Fracture toughness of 2-D carbon fibre reinforced carbon composites
The fracture toughness of 2-D woven carbon fibre reinforced carbon laminate has been evaluated by linear elastic fracture mechanics (LEFM),R-curve andJ-integral analysis using the single edge-notched bending (SEN...
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Article
Stress corrosion cracking of Al-Zn-Mg alloy AA-7039 by slow strain-rate method
The stress corrosion behaviour of Al-Zn-Mg alloy AA-7039 in an aqueous 3.5 wt % Nad solution (pH=1) was studied with the specimens under constant strain rate as function of ageing state and cold working. The t...
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Article
Fatigue life-limiting parameters in fibreglass composites
A study was conducted to determine the fatigue life-limiting parameters in E-glass fibre-reinforced vinyl esters. Because of the viscoelastic nature of fibreglass composites and the adiabatic heating during ra...
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Article
Stress wave emission and plastic work of notched specimens
The stress wave energy released from notched specimens of structural steel was measured in order to compare it with the recently proposedJ-integral which takes account of the effect of large plastic deformation a...
