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reduces to the equilibrium one, ke. If V→∞, then interface diffusion is solely determined by V/DI in Eq.(7) or (8), and a complete solute trapping occurs. This coincides with the limiting condition... Solute trapping model based on solute drag treatment WANG Hai-feng(王海丰), LIU Feng(刘 峰), CHEN Zheng(陈 正), YANG Wei(杨 伟) State Key Laboratory of Solidification Processing, Northwestern......
; hyperbolic diffusion equation; Si-As alloys; diffusionless solidification; complete solute trapping 1 Introduction Due to the relationship between the complex microstructures and the mechanical... is known as solute trapping and a complete understanding of the trapping process requires the dependence K(v) on the kinetic and thermodynamic properties of the alloy. The main prediction of LNDM [9-11,25......
solidification with effective diffusion coefficient →0 and complete solute trapping KLNDM(v)→1 at v→vDb for any kind of solid-liquid interface kinetics. Critical parameter for diffusionless solidification and complete solute trapping is the diffusion speed in bulk liquid vDb. Different models for solute trapping at the interface with different interface kinetic approaches were considered. Key words: binary......
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深过冷凝固Co80Pd20合金中的枝晶生长周圣银1,胡锐1,蒋力1,李金山1,寇宏超1,常辉1,周廉1(1.陕西省西安市西北工业大学凝固技术国家重点实验室)摘 要:采用玻璃熔体净化与循环过热相结合的深过冷凝固技术实现了Co80Pd20合金的深过冷,获得了高达415K的最大过冷度.采用OM观察了不同过冷度下凝固合金的微观组织,分析了枝晶形成的过冷度区间及过冷度对枝晶形貌的影响.运用BCT模型对深过冷凝固Co80Pd20中的枝晶生长进行了理论分析,获得了深过冷凝固过程中的枝晶生长速率,枝晶尖端半径,枝晶尖端溶质浓度......
inside the α-Fe dendrite is suppressed. The solute trapping effect occurs when the droplet diameter reduces to approximately 100 μm. For Fe-26%Mo alloy, the solidification microstructure is composed... of undercooling. The critical undercooling for this transition increases with the rise of Mo content in the alloy. Key words: undercooling; rapid solidification; solute trapping; dendrite growth; drop tube......
Numerical simulation on trapping efficiency of steady filtration process indiesel particulate filter and its experimental verificationZHANG Gui-ju(张桂菊)1, 2, EJia-qiang(鄂加强)1, 3, ZUO Qing-song(左青松)1... of filtering wall and exhaust-flow characteristic parameters on trapping efficiency were also analyzed and researched. The results show that: 1) The two developed mathematical models are consistent......
Ceria-Modified Clay Supported Palladium Catalysts for Complete Oxidation of Volatile Organic Compounds LI Jinjun1,HU Chun1,HAO Zhengping1 (1.Research Center for Eco-Environmental Sciences, Chinese... the synthesized pillared clays were used as supports to load palladium catalysts for complete oxidation of benzene.Nitrogen adsorption/desorption experiments reveal that the pillared clays have higher......
Numerical analysis of interaction between solute atom and extended dislocation using force multipolesHiroaki Morita, Akiyuki Takahashi(Department of Mechanical Engineering, Faculty of Science and Technology,Tokyo University of Science, 2641 Yamazaki, Noda-shi, Chiba, Japan)Abstract:The interaction between a solute atom and an extended dislocation was investigated using a continuum approximation......
Investigation of the solute transportation coupled with heat transfer and fluid flow during twin-roll strip casting process Wanjun WANG1,Xinhua WANG1,Jiongming ZHANG1,Chenxi JI2,Yongsheng WANG1...:Mathematical model of solute [C] distribution in twin-roll strip casting process has been setup successfully with Calcosoft for the first time. Simulation result shows that in the center......
