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diffusion kinetic model

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Proceedings Papers

ITSC 2021, Thermal Spray 2021: Proceedings from the International Thermal Spray Conference, 101-106, May 24–28, 2021,
...Abstract Abstract In this paper, a diffusion kinetic model was applied to simulate the microstructure development in a MCrAlY-superalloy system at high temperatures. Both simulation and experimental results showed that γ+γ’ microstructure was obtained in the coatings due to Al depletion after...
Proceedings Papers

ITSC1998, Thermal Spray 1998: Proceedings from the International Thermal Spray Conference, 729-734, May 25–29, 1998,
.... The velocity of the growth front assumed contact becomes a liquid/liquid contact. planar and parallel to the substrate surface, is linked to the undercooling degree by a linear kinetic model. The model was used to examine the effect of the following process variables: splat thickness b, substrate After...
Proceedings Papers

ITSC1997, Thermal Spray 1997: Proceedings from the United Thermal Spray Conference, 635-643, September 15–18, 1997,
... process of the splat are analyzed. Special attention is paid to the value of the wetting angle between the growing nucleus and the substrate, which affects greatly the nucleation temperature. alumina nucleation kinetics process modeling rapid solidification Thermal Spray: A United Forum...
Proceedings Papers

ITSC1998, Thermal Spray 1998: Proceedings from the International Thermal Spray Conference, 407-412, May 25–29, 1998,
...' heat transfer model involving melt undercooling, angle was estimated from the comparison of the computed nucleation and crystal growth kinetics, and crystalline phase grain density with the density observed on splat surface selection. Predictions have shown that the contact angle using an atomic force...
Proceedings Papers

ITSC 2021, Thermal Spray 2021: Proceedings from the International Thermal Spray Conference, 522-526, May 24–28, 2021,
... oxidation treatment. To understand metallic MnCu coating and the steel substrate in the early how the elements diffuse in the MnCu/steel system, a oxidation, thermodynamic and kinetic simulations were homogenization diffusion-couple model was built with carried out in this study. considering Mn oxidation...
Proceedings Papers

ITSC1997, Thermal Spray 1997: Proceedings from the United Thermal Spray Conference, 549-555, September 15–18, 1997,
... model. In a first step, thermodynamic and transport properties were calculated from chemical equilibrium composition, thermodynamic derivatives and kinetic theory of gases. Local Thermodynamic Equilibrium (LTE) was assumed for both plasma and surrounding gases. The proposed numerical results were...
Proceedings Papers

ITSC1998, Thermal Spray 1998: Proceedings from the International Thermal Spray Conference, 315-327, May 25–29, 1998,
... (by volume). Case I represents the equilibrium composition without diffusional effects and case 2 includes and enthalpy probe measurements represent averages over the diffusion. A certain temperature profile is specified as shown fluctuations of the plasma jet. The averaging, however, is in Fig. 8(a) which...
Proceedings Papers

ITSC 2021, Thermal Spray 2021: Proceedings from the International Thermal Spray Conference, 23-30, May 24–28, 2021,
..., doi: 10.4028/www.scientific.net/MSF.941.1898. pp. 817 826, 2018, doi: [14] R. Raj, Chemical potential-based analysis for the 10.1016/j.jallcom.2017.12.297. oxidation kinetics of Si and SiC single crystals, J. Am. [26] R. L. MEEK, Diffusion Coefficient for Oxygen in Ceram. Soc., vol. 96, no. 9, pp...
Proceedings Papers

ITSC2000, Thermal Spray 2000: Proceedings from the International Thermal Spray Conference, 211-217, May 8–11, 2000,
... by the of the system by changing the latent heat and the specific heat Landau Ginzburg representation of the functional of the free of the material on the resulting microstructure was examined. energy F: The interface kinetic between the solid and the liquid are influenced by interface energy, interface diffusion...
Proceedings Papers

ITSC1998, Thermal Spray 1998: Proceedings from the International Thermal Spray Conference, 341-346, May 25–29, 1998,
... analysis is to elucidate this behavior. 342 oxide. The growth is characterized by logarithmic kinetics Oxidation Process and below about 450°C whereas above this temperature, the rate is Reaction Kinetics Modeling approximately linear and obeys the Mott-Cabrera theory of oxidation kinetics for very thin...
Proceedings Papers

ITSC1998, Thermal Spray 1998: Proceedings from the International Thermal Spray Conference, 1485-1488, May 25–29, 1998,
...Abstract Abstract The use of overdriven detonation waves can promote coating fabrication from powder materials with high melting temperature and improve the quality coating for all materials. The detonation products flow behind overdriven detonation has kinetic and thermal energy values...
Proceedings Papers

ITSC 2002, Thermal Spray 2002: Proceedings from the International Thermal Spray Conference, 698-704, March 4–6, 2002,
... markedly risation in the form of Cr7C3 and Cr23C6, and carbide and level off. If the internal oxidation kinetics follow dissolution. The last of these was predominant over curve B, it suggests that the short circuit diffusion the range of coatings, particularly for the HVOF coat- paths are rapidly sealed...
Proceedings Papers

ITSC 2021, Thermal Spray 2021: Proceedings from the International Thermal Spray Conference, 256-260, May 24–28, 2021,
... model (SGP) is presented to predict materials behavior in CS process. The enhanced dislocation densities produced throughout particle deformation affect coating material properties and modify their thermodynamic characteristics and kinetics of resistance to plastic deformations. This study also...
Proceedings Papers

ITSC2000, Thermal Spray 2000: Proceedings from the International Thermal Spray Conference, 105-113, May 8–11, 2000,
... by: dt dx: (pw,) + (pUjU^) = " " ^ + ^"i + (8) e (2) which provides the coupling of the turbulence model to the eff 3M, Navier-Stokes, energy, and reacting flow equations. dx: 3x, 33x Combustion Modeling In almost all combustion processes, there are several elementary kinetic steps involved. Most...
Proceedings Papers

ITSC2000, Thermal Spray 2000: Proceedings from the International Thermal Spray Conference, 135-139, May 8–11, 2000,
...Abstract Abstract A model for oxidation of molybdenum particles during plasma spray deposition is developed. The diffusion of metal an-ions or oxygen cat-ions through a thin oxidized film, chemical reactions on the surface, and diffusion of oxidant in gas phase are considered as possible rate...
Proceedings Papers

ITSC2000, Thermal Spray 2000: Proceedings from the International Thermal Spray Conference, 871-880, May 8–11, 2000,
... formation. Since mullite obviously, thus indicated that zircon dissociated significantly. formation kinetics at this stage follows the Avrami model Tefragonal appeared after spheroidization and the peak [11,12], it can be shown [13] that if exp7) » expi-E/RTg), corresponding to its (111) plane became...
Proceedings Papers

ITSC1996, Thermal Spray 1996: Proceedings from the National Thermal Spray Conference, 563-568, October 7–11, 1996,
...). The k-e turbulence model introduces two new the plasma is optically thin and no radiation phenomena are differential equations of the form (Eq.2) for the calculation of taken into account; the kinetic energy, k, and its dissipation rate, E, whose transfer coefficients and source terms are reported...
Proceedings Papers

ITSC 2021, Thermal Spray 2021: Proceedings from the International Thermal Spray Conference, 542-547, May 24–28, 2021,
... of chemically inert gases defined by species mixing Turbulent models comparison laws. This is taken into account in Energy Equations and Species Transport Equations with Diffusion Energy Source The calculations results clearly indicate that the quality of the model included. Nozzle volume with dimensions; 21 mm...
Proceedings Papers

ITSC1998, Thermal Spray 1998: Proceedings from the International Thermal Spray Conference, 1595-1599, May 25–29, 1998,
... it is thermally sprayed (ceramic) coatings tend to exhibit isolated occasionally noted ' that this is thought to control the pores, which are to some extent linked by networks of kinetics of bond coat oxidation in TBCs. Measurements microcracks. A model which addresses the connectivity of have been made...
Proceedings Papers

ITSC 2021, Thermal Spray 2021: Proceedings from the International Thermal Spray Conference, 590-595, May 24–28, 2021,
... and on cold welding. If metallurgical processes, i.e. by moulding and sintering. Since the kinetic energy of the particles is too low, no coating is this requires the production of special moulds and the sintering formed. In this case, the spray particles, which are accelerated is typically carried out...