检索条件"作者=Key Laboratory of Beam {3. and Material Modification, MOE, Institute of Low Energy Nuclear Physics, and Department of Material science and Engineering, beijing Normal University, beijing 100875, china"
Metal vapor vacuum arc (MEVVA) source ion implantation is a new technology used for achieving long range ion *** is very important for research and application of the ion beammodification of materials. The results sho...
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Metal vapor vacuum arc (MEVVA) source ion implantation is a new technology used for achieving long range ion *** is very important for research and application of the ion beammodification of materials. The results showthat the implanted atom diffusion coefficient increases in Mo implanted Al with high ion flux andhigh dose. The implanted depth is 3.1.6 times greater than that ofthe corresponding ion range. The ionspecies, doses and ion fluxes play an important part in the long-range implantation. Especially,thermal atom chemistry have specific effect on the long-range implantation during high ion fluximplantation at transient high target temperature.
Mo silicides Mo_5Si_3.with high quality were prepared using ion beamdeposition equipment with two Filter Metal Vacuum Are Deposition (FMEVAD). When the number ofalternant deposition times was 198, total thickness of t...
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Mo silicides Mo_5Si_3.with high quality were prepared using ion beamdeposition equipment with two Filter Metal Vacuum Are Deposition (FMEVAD). When the number ofalternant deposition times was 198, total thickness of the coating is 40nm. The coatings withdroplet free can be readily obtained, so the surface is smooth. TEM observation shows that Mo and Sialternant deposition coating is compact structure. The fine Mo silicide grains densely distributedin the coating. The coating adherence on silicon is excellent.
<正> A ceramic oxide coating of 3.μm was prepared on TA2 pure titanium by alternating-current microarc oxidation in aluminate solution. Its microstructure and phase component were characterized by scanning electron...
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ISBN:
(纸本)1880132796
<正> A ceramic oxide coating of 3.μm was prepared on TA2 pure titanium by alternating-current microarc oxidation in aluminate solution. Its microstructure and phase component were characterized by scanning electron microscopy, X-ray diffractometry, Raman spectroscopy. The Al, Ti, O concentration profiles across the coating were determined by energy dispersive spectroscope. The coating contains two layers, an outer layer and an internal layer. The outer layer is composed of a large amount of TiAl2O5 and a little rutile type TiO2 compounds. But the rutile content in the inner layer is much higher than in the outer layer while the TiAl2O5 content decreases obviously in the inner layer. All of these oxides derive from a rapid solidification of the local molten coating in microarc discharge zone.
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