Mass Transport in Solids and FluidsCambridge University Press, 2 lis 2000 The field of matter transport is central to understanding the processing of materials and their subsequent mechanical properties. While thermodynamics determines the final state of a material system, it is the kinetics of mass transport that governs how it gets there. This book, first published in 2000, gives a solid grounding in the principles of matter transport and their application to a range of engineering problems. The author develops a unified treatment of mass transport applicable to both solids and liquids. Traditionally matter transport in fluids is considered as an extension of heat transfer and can appear to have little relationship to diffusion in solids. This unified approach clearly makes the connection between these important fields. This book is aimed at advanced undergraduate and beginning graduate students of materials science and engineering and related disciplines. It contains numerous worked examples and unsolved problems. The material can be covered in a one semester course. |
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... diffusion problems 3.6.1 Uniform initial concentration Ciand fixedsurface concentration Cs 3.6.2 Uniform initial concentration C i with fixed surface flux J* 3.6.3 Uniform initial concentration but different boundary conditions 3.6.4 ...
... diffusion problems 3.6.1 Uniform initial concentration Ciand fixedsurface concentration Cs 3.6.2 Uniform initial concentration C i with fixed surface flux J* 3.6.3 Uniform initial concentration but different boundary conditions 3.6.4 ...
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... diffusion distance in total flux kg/m2 s total flux mol/m2 s Avogadro's number /mol pressure Pa Boltzmann probability — flow rate mol/s or kg/s activation energy kJ/mol universal gas constant J/mol K Reynolds number - reaction rate mol ...
... diffusion distance in total flux kg/m2 s total flux mol/m2 s Avogadro's number /mol pressure Pa Boltzmann probability — flow rate mol/s or kg/s activation energy kJ/mol universal gas constant J/mol K Reynolds number - reaction rate mol ...
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... diffusion is due to the movement of point defects such as vacancies and interstitial atomswithin crystalline solids.Atthe macroscopic scale ... flux' , definedas the rate offlowper unitofcrosssectional area.1Oncethe ... diffusive response to.
... diffusion is due to the movement of point defects such as vacancies and interstitial atomswithin crystalline solids.Atthe macroscopic scale ... flux' , definedas the rate offlowper unitofcrosssectional area.1Oncethe ... diffusive response to.
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David S. Wilkinson. Figure 1.1 A schematic illustration of the diffusive ... solute concentration. As we will see, while this is not universally the case it is usually so to an ... flux has unitsof matter (either in moles ormass)perunitof ...
David S. Wilkinson. Figure 1.1 A schematic illustration of the diffusive ... solute concentration. As we will see, while this is not universally the case it is usually so to an ... flux has unitsof matter (either in moles ormass)perunitof ...
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... solute. Ifwe divide the net flow by the cross sectional area of the plane A and by the time interval δt, this becomesa net flux The concentration C of solute within each plane is given by n/(Aa). Therefore the flux can be written as ...
... solute. Ifwe divide the net flow by the cross sectional area of the plane A and by the time interval δt, this becomesa net flux The concentration C of solute within each plane is given by n/(Aa). Therefore the flux can be written as ...
Spis treści
Steadystate diffusion 2 1 Ficks FirstLaw 2 2 Applications to steadystate problems | |
Transient diffusion problems | |
concentration Cs 3 6 2 Uniform initial | |
materials engineering | |
Applications involving | |
Heat treatmentofbinary alloys | |
Diffusion in concentrated alloysand fluids | |
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activation energy alloy annealed assume assumptions Atomic Percent boundary conditions calculate carbon cementite composition concentration gradient concentration profile consider convection copper crosssectional cylinder density determine developed diameter diffusion coefficient diffusion couple diffusion distance diffusion problems diffusive flux dissolved equal equalto equation equilibrium constant error function eutectoid evaporation example Fick’s First Law Fick’s Second Law Figure film fixed flow fluid fraction free energy geometry given grain boundary growth heat hydrogen initial conditions interdiffusion interstitial inthe involving kinetics lattice layer liquid mass transfer coefficient masstransfer material metal molar molar volume molten nickel nitrogen occurs ofthe oxidation oxygen parameter particles pearlite phase diagram plate precipitate pressure radioactive reaction result schematic illustration solid solubility solute concentration species sphere spherical steel substitute Suppose surface concentration temperature thatthe thediffusion thickness tothe vapour velocity vessel volume wecan Weight Percent zero