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porosity.Then,during the carbonation process from the surface to the inside of carbonation area,it was prone to form micro-cracks extending to the interior specimen,resulting in cement paste carbonation......
with the extending of milling time. Moreover, the improved gaseous hydrogen storage kinetics of alloys are ascribed to a decrease in the hydrogen desorption activation energy caused by increasing Ni content......
in the strength loss of reinforcing fibers and meanwhile the growth of large extending length of CNTs,which can provide long reinforcement to the pyrocarbon matrix,and thus increase the compressive......
Structure and electrochemical hydrogen storage characteristics of Ce-Mg-Ni-based alloys synthesized by mechanical milling张羊换1,2,冯佃臣1,3,孙昊1,卜文刚2,祁焱2,郭世海21. College of Material and Metallurgy,Inner Mongolia University of Science and Technology2. Department of Functional Material Research,Central Iron ......
powders with commercial purity requires high cooling rates,which can only be achieved by extending the common process window in conventional gas atomization.The development of novel cooling......
design and modification of metal oxide MCs and MSCs for photocatalysis,photoelectrocatalysis, DSSCs and PSCs are systematically discussed. Finally, the perspectives on extending the application......
strength and hardness of GW01 aluminum alloy are all insensitive to aging time, which means that they only decreases a little with aging time extending. The elongation increases with aging time extending. The good mechanical properties of GW01 aluminum alloy pipe are obtained after T6 treatment process of (510 ℃, 3 h, water quenching)+(170 ℃, 18 h, air cooling). Key words: GW01 aluminum alloy......
the cracks propagation paths. Finite element method was used to solve the coupled governing equations, and corresponding code was made to simulate the dynamic fractures initiation, irregular extending... of complex fractures. By optimizing the perforation clusters spacing and numbers, which can produce more stronger effects of stress shadow, the complex multiple fractures extending trajectories can......
temperature zones. The critical cooling rate for 7020 alloy inhibiting any cooling precipitates is more than 700 ℃/min. The hardness and electrical resistivity change with the extending of cooling ending time with the extending of cooling ending time, since the different microstructures induce by different cooling processes. The precipitation of metastable phases during the cooling process leaded......
. The decrease of the open porosity and the permeability with exposure time extending and temperature increasing can be controlled within a certain range. Key words: porous alloy; high temperature oxidation... at higher temperatures show much faster growth rates of the oxide layers at the initial stage of oxidation (Fig. 2(a)). However, with the exposure time extending, the curves at higher temperatures are flatter......
