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, and the process parameters were optimized. The surface morphology, nucleation growth mechanism and phase component of the optimized TiC powders coated by pure nickel were studied using DSC, XRD, SEM.... The mean reaction speed and plating per unit mass TiC are 0.013 g/min and 0.8 g, respectively, and the reaction time is about 60 min. The heterogeneous nucleation of nickel occurs in the bench-shape......
metallurgy processing which was protected by active flux. The recrystallization temperature and nucleation mechanism of the alloy were studied by means of hardness tests, observations of optical microscopy... effect of highly disperseded Al3(Sc,Zr) particles on dislocations and sub-grain boundaries. The recrystallizing process reveals itself the nucleation mechanism of the alloy involving not only the sub......
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Investigation of the Heterogeneous Nucleation on Fractal SurfacesMeng Wang , Ying Zhang, Haoyong Zheng, Xin Lin and Weidong Huang State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi an 710072, China摘 要:Classical theory of heterogeneous nucleation has been developed with an implied hypothesis of smooth substrate......
Eutectic nucleation in Al-7 wt pct Si-Mg casting alloysZhongwei CHEN , Cuiying MA and Jing ZHAO State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi an 710072, China摘 要:The nucleation of eutectic crystals of hypoeutectic Al-7 wt pct Si-Mg casting alloys modified by Ce and Sr was studied by using differential......
; crystallization; nucleation and growth ..., depending on rate of nucleation and morphology of growth during the reaction, and k is the Avrami reaction rate constant, depending on thermal history of the reaction system. k is associated......
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with good crystal structure was prepared by hydrothermal process at 110 ℃ for 6 h. Larger amount of goethite seeds could be produced by pseudo-homogeneous nucleation method to meet the mass demand of industry to remove ferrous/ferric ions from the leaching solution in zinc hydrometallurgy. Key words: goethite; hydrothermal process; pseudo-homogeneous nucleation method; crystal seeds ......
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