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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... parameters inFick's First Law. We generally use units of moles per unit volume (e.g. mol/m3) for concentration, although concentrationcan alsobe representedinterms ofmass per unit volume (e.g.kg/m3).The flux has unitsof matter (either ...
... parameters inFick's First Law. We generally use units of moles per unit volume (e.g. mol/m3) for concentration, although concentrationcan alsobe representedinterms ofmass per unit volume (e.g.kg/m3).The flux has unitsof matter (either ...
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... parameter g, which represents the larger range of possible directions in which an atom can jump. Generally, g 1/6 ... parameter D 0i , while the enthalpy has been rewritten as an activation energy Q i . These two parameters are allthat ...
... parameter g, which represents the larger range of possible directions in which an atom can jump. Generally, g 1/6 ... parameter D 0i , while the enthalpy has been rewritten as an activation energy Q i . These two parameters are allthat ...
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... parameter 'a' now represents the nearest neighbour spacing in the lattice. While the diffusion coefficient for vacant sites is of interest, what we really want is the diffusion coefficient of lattice atoms –either host atoms or a ...
... parameter 'a' now represents the nearest neighbour spacing in the lattice. While the diffusion coefficient for vacant sites is of interest, what we really want is the diffusion coefficient of lattice atoms –either host atoms or a ...
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... parameters, although a theory by Eyring 6 suggests that Here G vis is the free activation barrier for molecules to rearrange within the liquid. There is no firstprinciples model which adequately predicts the value of (1.17) whereN0 is ...
... parameters, although a theory by Eyring 6 suggests that Here G vis is the free activation barrier for molecules to rearrange within the liquid. There is no firstprinciples model which adequately predicts the value of (1.17) whereN0 is ...
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... parameters intoeq. (1.26) we find thatthe diffusion coefficient of oxygen is 3.06 ×10−6 m2/s. If we have twogasesA and B with unequal mass and diameter, theresult is similar but more complexinform. itis (1.27) Kirkaldy andYoung8If ...
... parameters intoeq. (1.26) we find thatthe diffusion coefficient of oxygen is 3.06 ×10−6 m2/s. If we have twogasesA and B with unequal mass and diameter, theresult is similar but more complexinform. itis (1.27) Kirkaldy andYoung8If ...
Spis treści
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