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growth model: the growth on the crystallite templates stretching in the radius directions is free and quick, while the growth rate for crystallites in other directions is confined due to lower... monochromator. Continuous scan was performed with scanning rate 4 (?)/min and scanning 2θ scope 10?-70?. 3 Results and discussion 3.1 Growth processes of Ni(OH)2 particle The SEM......
Growth rate and composition of directionally solidified intermetallic TiAl–Nb alloys with different solidification conditionsLi-Wei Zhang1,Jun-Pin Lin1,Xiang-Jun Xu2,Jian-Ping He1,Xian-Fei Ding3,Xiao... measured statistically.The values of λ1,λ2,R and d decrease as the growth rate increases for a given composition(x).The values of λ1,λ2,R and v increase with the increase in x value,while the value of d......
to the crystal growth theory, the morphology of monocrystal is determined by the relative growth rate of different crystal faces[15]. For cubic Cu2O monocrystal, when face (111) grows relatively fast, the shape of Cu2O crystal tends to cube. When face (100) grows relatively fast, it tends to octahedron. When growth rate of face (111) is close to the growth rate of face (100), the shape of crystal......
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+] and the yield coefficient of Fe2+ on the specific growth rate of A.ferrooxidans in different concentrations of Mn2+ were fitted, the effect of Mn2+ concentration on the growth of A.ferrooxidans was described better. Keywords: Acidithiobacillus ferrooxidans; biological leaching manganese; growth kinetics; specific growth rate Foundation item: Project(21176026, 21176242) supported by the National......
. Under the condition of sharp-cooling, particles are cooled down rapidly, the particle growth can be confined without affecting the nucleation rate. The free inert gas convection developing between... Growth mechanism of Cu nanopowders prepared by anodic arc plasma WEI Zhi-qiang(魏智强)1, 2, XIA Tian-dong(夏天东)2, MA Jun (马 军)1, DAI Jian-feng(戴剑锋)1, FENG Wang-jun(冯旺军)1, WANG Qing (王 青)1, YAN Peng......
qualitatively discussed. The Nd2Fe14B grain growth proceeded at quite a high rate in the initial 0~1 h of sintering and from then onwards the grain growth rate decreased. A large average particle size...Grain Growth Behavior in Sintered Nd-Fe-B Magnets Zhou Shouzeng1,Liu Xianglian2 (1.State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing......
Effects of Ni catalyzer on growth velocity and morphology of SiC nano-fibers XU Xian-feng(徐先锋)1, 2, XIAO Peng(肖 鹏)1, XIONG Xiang(熊 翔)1, HUANG Bai-yun(黄伯云)1 1. State Key Laboratory.... The resulting SiC-NFs appear more spindle-like and have a more homogeneous dispersion. The mass change of the samples before and after deposition shows that using more Ni granules results in a faster growth......
Uniform AlF3 thin layer to improve rate capability of LiNi1/3Co1/3 Mn1/3O2 material for Li-ion batteries WANG Hai-yan(王海燕), TANG Ai-dong(唐爱东), HUANG Ke-long(黄可龙), LIU Su-qin(刘素琴) School... precipitation method to improve its rate capability. The samples were characterized by X-ray diffractometry (XRD), transmission electron microscopy (TEM), energy dispersive spectroscopy (EDS), charge-discharge......
; (2) where D is the grain size at a given annealing time; D0 is the initial grain size; t is the heat treatment time; n is the grain growth exponent, and K is the grain growth rate constant. If atomic diffusion across the grain boundary is a simple activated process, the grain growth rate constant K in an Arrhenius form can be written as K=K0exp[-Q/(RT)] ......
