7,144 Result(s)
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Bo**g Lu
Characterization and Evaluation of Materials
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Article
Thermal Stability of Precipitates in a Rapidly Quenched Ti-Al-Si Alloy
Ostwald ripening of precipitates in rapidly solidified Ti-5Al-2Si (wt.%) has been studied by TEM. Results show that particle coarsening at 700 and 800°C is controlled by volume diffusion. Diffusion coefficient...
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Chapter and Conference Paper
On the Relationship between the Geometry of Deformed Crack Tip and Crack Parameters
An experimental investigation into the relationship between fracture mechanics parameters (J integral and crack tip opening displacement) determined by mechanics tests and geometrical parameters of deformed cr...
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Article
Modification in the aluminum silicon system
Alloys in the range 0 to 24 wt pct Si have been examined by careful thermal analysis, macroand microscopical study with modification by a mixed alkali fluoride flux, and by separate additions of sodium, potass...
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Article
Crack paths and hydrogen-Afinssisted crack growth response in AlSi 4340 steel
A study of the correlation between crack paths and crack growth response was undertaken to define better the elemental processes involved in gaseous hydrogen embrittlement. AISI 4340 steel fractured under sust...
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Article
On the relationship between the geometry of deformed crack tip and crack parameters
An experimental investigation into the relationship between fracture mechanics parameters (J integral and crack tip opening displacement) determined by mechanics tests and geometrical parameters of deformed crack...
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Article
The Influence of Pore-Structure on the Compressive Strength of Hardened Cement Paste
The pore-structure strongly influences the compressive strength of hardened cement paste (hcp) and other porous materials, as well as other mechanical properties. The simplest but most currently used expressio...
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Article
Electrical Transport through Metal Contacts to In0.53Ga0.47As Thin Films
We report two phenomena observed in the electrical transport through metal contacts to In0.53Ga0.47 As thin films. First, a surface accumulation layer of electrons is found at the oxide-In0.53Ga0.47 As interface ...
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Article
Rapid Thermal Annealing of Deposited SiO2 Films
Silicon dioxide films have beep deposited at an oxygen pressure and substrate temperature as low as 10−2 Pa and 300°C, respectively, using a partially ionized nozzle-beam technique. The refractive index of the fi...
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Article
Characterization of Surface Defect Structure by Low Energy Electron Diffraction*
Low energy electron diffraction is a surface sensitive tool which is most widely used for the determination of surface symmetries and equilibrium atomic positions. Experimental and theoretical advances made in...
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Article
On combined self-phase modulation and stimulated Raman scattering in optical fibres
A theory on combined self-phase modulation (SPM) and stimulated Raman scattering (SRS) in optical fibres is given. The theory shows that Raman frequency conversion is not affected by SPM, and the phase shifts ...
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Article
Modeling of heat flow in sand castings: Part I. The boundary curvature method
A method has been developed for the representation of the abstraction of heat from castings into bonded sand molds. The method consists of representing the local surface geometry of the part by a plane, cylind...
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Article
Measurement of residual-stress distribution by the incremental hole-drilling method
The hole-drilling method is widely used to measure residual stresses in mechanical components. Recent developments have shown that strains measured on the surface during an incremental drilling can be related ...
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Article
Microstructures and age hardening of rapidly quenched Ti-Zr-Si alloys
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Article
The effect of gas temperature on the growth of InP by atomspheric pressure metal-organic chemical vapor deposition using trimethyl indium and PH3 sources
The growth of InP by atmospheric pressure Metal-Organic Chemical Vapor Deposition using trimethyl indium (TMIn) and PH3 sources is demonstrated. No evidence was found to suggest depletion of TMIn due to a TMIn-PH
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Article
Particle Coarsening of Dispersoids in Rapidly Solidified Ti-5Sn-3Y
Rapidly solidified Ti alloys containing rare earth metal dispersoids, such as La or Er, have excellent resistance to coarsening at elevated temperature (700–900°C). In particular, the coarsening of the dispers...
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Article
Stability of Heavily Doped Si Formed by As+ Implantation and Rapid Thermal Annealing
Deactivation of ion implanted and rapid thermal annealed (RTA) metastable arsenic in silicon during subsequent furnace annealing has been studied by sheet resistance measurement, Rutherford backs cat t ering/ ...
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Article
Effect of Hydration Temperature on Cement Paste Structure
The effect of temperature on the progress of hydration and cement paste structure and properties was studied using four laboratory-synthesized Portland cements, hydrated at temperatures between 5 and 95°C for ...
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Article
Anomalous SAW velocity changes on Ti-diffused ZY-LiNbO3
The velocity of a surface acoustic wave (SAW) on the surface of Ti-diffused ZY-LiNbO3 is studied experimentally. A negative velocity-change maximum is observed on Ti-diffused +ZY-LiNbO3. The value of this change ...
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Article
The relationship of the initiation stage to the rate of slow crack growth in linear polyethylene
The rate of notch opening was observed in single-edge notched tension specimens of linear high-density polyethylene under plane strain conditions as a function of applied stress and notch depth. The initial ra...
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Article
Plastic flow under multiaxial cyclic loading
An experimental study of the inelastic behavior of annealed aluminum alloy 6061-T6 tubular specimens subjected to combined axial and torsional stress cycles is presented. Particular attention is paid to the qu...
