22,925 Result(s)
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Article
Refractory-metal stabilized amorphous stainless steel
Commercial stainless steel alloys have been made into amorphous, or glassy, states by adding nearly 10 at % of refractory metals, such as W or Ti, via high-rate sputter deposition. The formation of these stabl...
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Crystallization characteristics of an amorphous Nb81Si19 alloy under high pressure and formation of the A15 phase
Amorphous Nb-19 at% Si alloy, prepared by rapid quenching from the molten state, was annealed while being subjected to a pressure of 10 GPA. X-ray diffraction investigations on the alloy specimens quenched to ...
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Article
A distributed dislocation stress analysis for crazes and plastic zones at crack tips
A distributed dislocation method is developed to obtain analytically the applied stress as well as the surface stress profile along narrow plastic zones at the tip of a crack in a homogeneous tensile stress fi...
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Long-Term Thermomechanical and Thermohydrological Factors Controlling the Optimal Design of a Nuclear Waste Repository
Surface uplift and buoyancy flow are two of the major long-term, far-field perturbations to the geologic formations around a nuclear waste repository. The allowable surface uplift has been accepted in the lite...
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Article
Electronic States of Grain Boundaries in Bicrystal Silicon
Electronic states at a 20° symmetrical(100) tilt boundary in p-type silicon were studied using deep level transient spectroscopy (DLTS) and other electrical measurements. The data can be explained with a model...
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Article
Carbon fibre-reinforced silicon nitride composite
The processing of silicon nitride reinforced with carbon fibre was studied. The problems of physical and chemical incompatibility between carbon fibre and the silicon nitride matrix were solved by addition of ...
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Article
A Study of Coupled Thermomechanical, Thermohydrological and Hydromechanical Processes Associated with a Nuclear Waste Repository in a Fractured Rock Medium
It has been recognized that coupled thermomechanical, thermohydrologic, and hydromechanical processes may play an important role in the behavior of the geologic formation around a nuclear waste repository. A n...
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Symposium M
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Preparation of GaAs SOI and its Laser Recrystallization
GaAs SOI consisting of a sputtered GaAs film on a SiO2-Si or sapphire substrate is irradiated by CW Ar+ laser beam with a view to investigating its recrystallization. Using AES, x-ray diffraction, TEM and ED, we ...
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Article
Study on Taylor Criterion for Complete Fracture of the Casing Packed with High Explosive
The criterion for complete fracture of the casing by detonation of packed high explosive was first presented by G.I.Taylor. Thereafter Taylor criterion has been reviewed and extended by many authors. This pape...
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Article
Tough–A Numerical Model for Nonisothermal Unsaturated Flow to Study Waste Canister Heating Effects
The physical processes modeled and the mathematical and numerical methods employed in a simulator for non-isothermal flow of water, vapor, and air in permeable media are briefly summarized. The simulator has b...
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Article
Structure Transition of Metallic Glasses of Alloys Annealed at High Pressure for the Exploration of Superconducting Compounds
In this article, the formation of superconducting compounds through structure transition of metallic glasses at high pressure high temperature are emphasized, and investigations on structure transition of meta...
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Article
Crystallization characteristics of an amorphous Ti80Si20 alloy at high pressures
Amorphous Ti-20 at% Si alloy, prepared by rapid quenching from the molten state, was annealed while being subjected to a pressure of 10GPa. X-ray diffraction investigations on the alloy specimens quenched to a...
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Article
Effect of Low Energy Hydrogen Implants on Damage Caused by Argon Ion Beam Etching
The dry etching technologies reactive ion etching (RIE) and ion beam etching (IBE) have both been shown to cause a damaged layer at silicon surfaces. It has been demonstrated that this damage can be annealed o...
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Article
Corrosion behavior of Ni+-Ion Irradiated NiTi Alloys
Corrosion behavior of Ni+ -irradiated NiTi alloys was studied in chloride solutions, together with unirradiated NiTi material with different surface conditions. Ion irradiation with either 2.5 or 5 MeV Ni+ ions t...
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Article
Young's modulus of porous materials
A relationship between porosity and Young's modulus is obtained theoretically for porous materials made by powder metallurgy. The relationship is applicable to the entire range of porosity and is capable of tr...
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Young's modulus of porous materials
The Young's modulus of porous alumina was determined by both sonic and bending tests. The pore structure of the specimens changes from interconnected at high porosities to disconnected at low porosities. The Y...
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Article
Characterization of Epitaxial CoSi2 Films Grown on <111> Si
X-ray rocking curves and backscattering spectrometry with channeling have been employed to investigate epitaxial CoSi2 films grown on <111> Si substrates. Several preparation techniques were used: sputter cleanin...
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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
Test Methods to Predict Long-Term Corrosion of Container Materials in Repositories
MCC test methods in support of basalt, salt and tuff repositories are described. The methods consist of three general corrosion tests for basalt, two general corrosion tests and three stress corrosion tests fo...
