Model for the ZrO2-Y2O3 - Ceramic Solidification during the Atmospheric Plasma Spraying on the Ni-Substrate

• Autorzy: Wołczyński W. , Kloch J. , Pawłowski A.
• Języki publikacji: EN

Abstrakty

EN

A model of the structure formation during solidification of ceramic on the metalic substrate has been worked out. The 2D and 3D types of structure have been taken into account in the model. The model contains also the layer of chilled fine structure from the side of air as well as amorphous layer from the side of Ni-substrate. Additionally, a model for solute microsegregation and solute redistribution has been developed to describe the behaviour of solute within the three regions of 2D and 3D structures formation. The model allowed for selecting the measurement points, which can be interpreted by means of the equations, which take into account both partitioning and back-diffusion. An influence of solidification rate on partition ratio has also been taken into account in calculation. The theoretical curves of solute redistribution have been plotted to fit selected measurement points. The curves of solute redistribution allowed to determine the back-diffusion parameter for the three sub-layers visible within the morphology obtained during the atmospheric plasma spraying and solidification of ZrO₂-Y₂O₃ ceramic on the Ni-substrate.

Słowa kluczowe

EN

plasma spraying; surface coating; ceramic solidification; back-diffusion; solute microsegregation; solute redistribution

• Wydawca: Polska Akademia Nauk, Wydział IV Nauk Technicznych
• Czasopismo: Bulletin of the Polish Academy of Sciences. Technical Sciences
• Rocznik: 2002
• Tom: Vol. 50, Nr 3
• Strony: 181--195
• Opis fizyczny: Bibliogr. 7 poz., 10 rys.

Twórcy

autor

Wołczyński W.

• Institute of Metallurgy and Materials Science, Polish Academy of Sciences, Reymonta 25, 30-059 Kraków (Instytut Metalurgii i Inżynierii Materiałowej PAN)

autor

Kloch J.

• Institute of Mathematics, Polish Academy of Scinces, św. Tomasza 30, 31-027 Kraków (Instytut Matematyczny PAN)

autor

Pawłowski A.

• Institute of Metallurgy and Materials Science, Polish Academy of Sciences, Reymonta 25, 30-059 Kraków (Instytut Metalurgii i Inżynierii Materiałowej PAN)

Bibliografia

• [1] E.M. Levin, C.R. Robbins, H. F. McMurdie, Phase diagrams for ceramists, ed. The American Ceramic Society, eds. M. K. Reser, Columbus, Ohio (1964) 140-140.
• [2] L. Górski, Thermal resistance and phase transitions studies for some composite materials based on Al2O3, Acta Physica Polonica A, 96 (1999) 275-281.
• [3] T. Chraska, A.H. King, Interfaces in rapidly solidified zirconia-yttria, Materials Science Forum, 294-296 (1999) 779-782.
• [4] W. Wołczynski, J. Kloch, Solute redistribution after back-diffusion in cellular and dendritic growth of binary alloys, Bull. Pol. Ac.: Tech, 46 (1998) 277-288.
• [5] W. Wołczynski, in: Modelling of transport phenomena in crystal growth, ed. WIT Press, Southampton-Boston (2000) 19-59.
• [6] M. J. Aziz, in: Rapid solidification processing principles and technologies III, ed. R. Mehrabian, National Bureau of Standards, Gaithersburg, Md (1983) 113-117.
• [7] J. Kloch, B. Billia, T. Okane, T. Umeda, W. Wołczynski, Experimental verification of the solute redistribution in cellular/dendritic solidification of the Al-3.5Li and Fe-4.34Ni alloys, Materials Science Forum, 329-330 (2000) 31-36.