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] Table 1 Maximum solid solubility and temperature for some traditional addition elements in aluminium[1] 时效析出需同时满足过饱和固溶体(Supersaturated solid solution)产生的析出热力学/驱动力,并且需要克服热力学激活能能垒(Activation energy......
× 70 mm were cut for anodization which was performed in a 20% water solution of H2SO4, with 100 A/m2 of current density. A round platinum grid was used as a cathode. Anodization was performed at room... was detected in the multilayer composite obtained by alternately arranged pure aluminum foils and those previously anodized. The main "source" for Al2O3 formation was obviously a solid compound Al2......
samples were etched in 0.5% HF solution for about 10-15 s. First, the samples were viewed and images were taken at varying magnification using Stereo-zoom optical microscope. The weld joints profiles were... is characterised with dendritic grain structure which is cellular at the core and columnar at the boundary. At the solid-liquid interface (i.e., at the boundary of the fusion zone......
of the materials. As shown in Fig. 6(b), the wear rates of the composites containing 4 vol.% and 6 vol.% MoS2 particles were even more than that of the unreinforced aluminum. The effectiveness of a solid lubricant...) The friction traces of pure aluminum fluctuated severely. Formation of a solid lubricating MoS2 film on the wear surface of Al/2MoS2 composite decreased the friction fluctuations. However, the composites......
were employed. Furthermore, solid elements were employed for constructing mesh patterns of the foam. It is noticed that the mesh convergence analysis was adopted in LS-DYNA. Finally, the suitable element sizes were found 2 mm×2 mm×2 mm and 2 mm×2 mm for the solid and shell elements, respectively. AUTOMATIC-SINGLE- SURFACE algorithm was used in order not to penetrate decagonal structure walls......
to the precipitation of strengthening phases, such as Al2Cu (θ) and Al2CuMg (S) upon solid solution and artificial aging [2]. To join the aluminum alloy, the conventional fusion welding usually results..., Jun ZHOU3, Chang-an LI1,2 1. Key Laboratory for Liquid-Solid Structure Evolution and Processing of Materials, Ministry of Education, Shandong University, Ji’nan 250061, China; 2. Institute......
-intense peaks are also observed. This feature is also similar to the In2O3 pattern, although the peaks are shifted toward higher angles due to the addition of Sn and the formation of a solid solution... Solid Films, 2000, 378: 455-459. [16] BAGHI R, ZHANG K, WANG S, HOPE-WEEKS L J. Conductivity tuning of the ITO sol-gel materials by adjusting the tin oxide concentration, morphology......
and formation of metals can proceed from the three-dimensional data of CAD design and rapidly form complex solid materials or parts based on layer-by-layer addition. AM is an advanced processing technology... and solidification time of metal droplets can be expressed as [22] tsol=[Dρm/(6h)]cpln[(Tm-To)]+H/(Ts-To) (4) where D is the droplet diameter, ρm is the metal solution density, h is the heat transfer coefficient, cp......
mm/s, the same high level selected for the starting configuration. It resulted in the production of a free-defect profile and to an extended die lifetime if compared to the v0 solution. Indeed, while... Technology, 2014, 14(11): 2349-2358. [7] YU Jun-quan, ZHAO Guo-qun, CHEN Liang. Analysis of longitudinal weld seam defects and investigation of solid state bonding criteria in porthole die extrusion......
using a single-wafer wet processor[J]. Solid State Phenomena, 2014, 219: 93-96. [48] GUO T, YU W, CHIEN C C, et al. Single wafer selective silicon nitride removal with phosphoric acid and steam[J]. Solid...: 132-141. [53] WATANABE D, AOKI H, ITANO M, et al. High selectivity(SiN/SiO2) etching using an organic solution containing anhydrous HF[J]. Microelectronic Engineering, 2009, 86(11): 2161-2164. [54......