منابع مشابه
Dislocation Avalanche Polycrystalline Nickel
Self-organized criticality (SOC) is widely observed in systems ranging from creep deformation of single crystal ice to the movement of glacier. -The behavior of these SOC systems follows a power law distribution, which is timeand space-scale invariant. Previous phase field simulation of single crystal nickel has shown that plastic flow is characterized by intermittent dislocation avalanches, wh...
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We have conducted highP-Tsynchrotron X-ray and time-of-flight neutron diffraction experiments as well as indentation measurements to study equation of state, constitutive properties, and hardness of nanocrystalline and bulk nickel. Our lattice volume-pressure data present a clear evidence of elastic softening in nanocrystalline Ni as compared with the bulk nickel. We show that the enhanced over...
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Abstract : In this study, we prepared a LaNi0.3Al0.7O3 perovskite catalyst using a sol-gel related method (with prop ionic acid as a solvent) for use in the methane dry reforming reaction to produce synthesis gas. We defined the catalyst structure on the basis of X-ray diffraction analysis and measurements of the specific surface area and particle size distribution. The mixed oxide structure ...
متن کاملProton Diffusion in Nickel Hydroxide Films
Electrochemical impedance spectroscopy (EIS) was used to measure the solid-state diffusion coefficient of protons in nickel hydroxide films at room temperature as a function of state of charge (SOC). A model for the complex faradaic impedance of the nickel hydroxide active material is presented and used to extract the diffusion coefficient of protons from the EIS data. Impedance data over a ran...
متن کاملHydrogen Diffusion and Trapping in Electrodeposited Nickel
In an attempt to quantify grain boundary diffusion of hydrogen in nickel, permeation in electrodeposited foil has been investigated. Pinhole-free specimens were plated from a nickel sulfamate bath onto a reusable anodized titanium cathode. The microstructure was a mixture of regions of fine grains (diameters <0.1 tm) and individual grains up to 2 tm in diameter. The specimens were subjected to ...
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ژورنال
عنوان ژورنال: Canadian Journal of Chemistry
سال: 1959
ISSN: 0008-4042,1480-3291
DOI: 10.1139/v59-236