共搜索到15874条信息,每页显示10条信息,共1588页。用时:0小时0分0秒494毫秒
J. Cent. South Univ. (2020) 27: 3839-3851 DOI: https://doi.org/10.1007/s11771-020-4503-y Torsional dynamic response of tapered pile considering compaction effect and stress diffusion effect GUAN... and the stress diffusion effect of pile end soil, this paper theoretically investigates the torsional vibration characteristics of tapered pile. Utilizing the complex stiffness transfer model to simulate......
source, respectively, while H2 was employed as the carrier gas. To reduce the heavy lattice mismatch between the film and the substrate, a 3C-SiC buffer layer was inserted between them in a CVD...Effects of Buffer Layer on Hetero-Epi-Growth of SiCGe on 6H-SiC Li Lianbi1,Lu Gang1,Pu Hongbin1,Tan Changxing1,Chen Zhiming1 (1.Department of Electronic Engineering, Xi′an University of Technology......
......
J. Cent. South Univ. (2020) 27: 1880-1890 DOI: https://doi.org/10.1007/s11771-020-4415-x A non-monotonic blow-off limit of micro-jet methane diffusion flame at different tube-wall thicknesses LI... Germany, part of Springer Nature 2020 Abstract: In order to provide guideline for choosing a suitable tube-wall thickness (d) for the micro-jet methane diffusion flame, the effect of tube-wall thickness......
model based on the thermodynamics and kinetics of nitrogen diffusion process. The results show that the compound layer consists of dual phases ε (Fe2-3N) and γ'' (Fe4N) and its thickness increases with increasing nitriding time. The calculated data indicate that the critical concentration between compound layer and diffusion one is about 0.82wt%. The computer simulation results demonstrate......
coating and superalloy GH202 substrate during vacuum diffusion was studied. It is shown that Al2O3 oxide layer and (Ti, N) compound exist in the alloy substrate close to interface. During long time... Interface microstructure and diffusion of vacuum annealed ceramic coating on superalloy GH202 GU Yi(古 一), XIA Chang-qing(夏长清), QIU Guan-zhou(邱冠周), WANG Zhi-fa(王志法) School of Materials......
Studies on Oxygen Characteristics of YBa2Cu3O7-x and Its Applications to Air Separation and Gas Purification Guo Yiqun1,Gao Zhishuang2,Lu Hongxia2,Yang Delin2,Mo Jiong2,Hu Xing2 (1.Department..., China) Abstract:Oxygen diffusion and oxygen selective adsorption properties of rare earths material YBa2Cu3O7-x (YBCO) were investigated by thermogravimetric, oxygen static adsorption......
conditions. Over the range of 350–400?C, the structure of Al2Ca is more stable than that of Al4Ca, Al14Ca13 and Al3Ca8. The growth constants of the layer Ⅰ, layer Ⅱ and entire diffusion reaction layers were determined. The activation energies for the growth of the layer Ⅰ, layer Ⅱ and entire diffusion reaction layers were(80.74 ± 3.01) k J/mol,(93.45 ± 2.12) k J/mol and(83.52 ± 1.50) k J/mol......
of the sample (0.061%) is significantly higher than that of the bulk material (0.054%). All results show that carbon has long-range diffusion from the outer layer to the inner layer of the sample... in realizing the super long-range carbon diffusion. The proeutectoid ferrite layer of about 450 μm thickness was obtained in this study due to the carbon diffusion from the surface into the interior......
ARTICLE J. Cent. South Univ. (2019) 26: 2185-2196 DOI: https://doi.org/10.1007/s11771-019-4165-9 Experimental study on repair characteristics of damaged rock salt of underground gas storage YIN... on permeability, which affects the tightness of underground salt cavern gas storage in further. During the leaching of a salt cavern, the brine with formation temperature and pressure can promote......