The method, which allows shape reconstruction by reading the intensity from the scanning electron microscopy image, is presented and discussed in details. The method is applied to read the morphology of etch-pits, which were formed on the GaN surface by etching in molten KOH-NaOH eutectic mixture to delineate dislocations. The etch-pit depth distributions are obtained and used to determine densities of pits related to screw, mixed or edge-type dislocations. The results are compared with atomic force microscopy.
[Show abstract][Hide abstract] ABSTRACT: In the SPring-8 positron beams will be used and generated in the
linac. In this paper, simulations and experiments of a test apparatus
for the convertor are described. Results of simulations are
qualitatively coincident with that of experiments, and from simulation
results, an electron/positron conversion efficiency of 0.5% is obtained
at the end of the convertor, with a feasible design of the convertor
system. A future plan of superconducting magnet system for the convertor
is also mentioned
Particle Accelerator Conference, 1995., Proceedings of the 1995; 06/1995
[Show abstract][Hide abstract] ABSTRACT: Pitting corrosion is a damage mechanism quite serious and dangerous in both carbon steel boiler tubes for power plants which are vital to most industries and stainless steels for orthopedic human implants whose demand, due to the increase of life expectation and rate of traffic accidents, has sharply increased. Reliable methods to characterize this kind of damage are becoming increasingly necessary, when trying to evaluate the advance of damage and to establish the best procedures for component inspection in order to determine remaining lives and failure mitigation. A study about the uncertainties on the topographies of corrosion pits from 3D SEM images, obtained at low magnifications (where errors are greater) and different stage tilt angles were carried out using an in-house software previously developed. Additionally, measurements of pit depths on biomaterial surfaces, subjected to two different surface treatments on stainless steels, were carried out. The different depth distributions observed were in agreement with electrochemical measurements.
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