Microstructure and phase distribution of MCrAlY coatings.

• Autorzy: Penkalla H.J. , Wosik J. , Clemens D. , Quadakkers W.J. , Singheiser L.
• Konferencja: AMT'98 XVth Physical Metallurgy and Materials Science Conference 'Advanced materials & technologies' 17-21 May, 1998, Kraków-Krynica, Poland.
• Języki publikacji: EN

Abstrakty

EN

For the protection of turbine blade materials against oxidation, coatings of the MCrAlY type are applied. The oxidation resistance of these multiphase coatings relies on protective alumina scales which are formed on the coating surface at high service temperatures of about 900 degrees centigrade, and is strongly affected by the phase distribution and composition. In the present study the coating material MCrAlY is investigated by means of transmission electron microscopy (TEM) whereby the chemical composition of the elements Ni, Co, Cr, Al, Re and Y was analysed systematically by EDX elemental mapping. In order to describe the phase distribution and composition in a single image a special method for the evaluation of the EDX elemental maps by statistical methods combined with image analysis were applied and described in this paper.

Słowa kluczowe

EN

turbine blade; coating; plasma spraying; oxidation resistance; alumina; chemical composition; corrosion protection; phase composition

PL

łopatka turbiny; powłoka; napylanie plazmowe; odporność na utlenianie; tlenek glinu; skład chemiczny; ochrona przed korozją; skład fazowy

• Wydawca: Wydawnictwo SIGMA-NOT
• Czasopismo: Inżynieria Materiałowa
• Rocznik: 1998
• Tom: R. XIX, nr 4
• Strony: 982--985
• Opis fizyczny: Bibliogr. 4 poz. rys.

Twórcy

autor

Penkalla H.J.

• Forschungszentrum Jülich GmbH, Institute for Materials in Energy Systems, Jülich FRG

autor

Wosik J.

• University of Mining and Metallurgy, Kraków, Poland

autor

Clemens D.

• Forschungszentrum Jülich GmbH, Institute for Materials in Energy Systems, Jülich FRG

autor

Quadakkers W.J.

• Forschungszentrum Jülich GmbH, Institute for Materials in Energy Systems, Jülich FRG

autor

Singheiser L.

• Forschungszentrum Jülich GmbH, Institute for Materials in Energy Systems, Jülich FRG

• Forschungszentrum Julich GmbH, Institute for Materials in Energy Systems

Bibliografia

• [1] G. Cliff, G.W. Lorimer, Journ. Microsc. 103 (1975), p. 203
• [2] S. Carrara, G. Mascetti, C. Nicolini, Optik 104 Nr 1 (1996) p.35
• [3] J.C. Russ, “The Image Processing Handbook“, 2nd ed., CRC Press, London
• [4] F. Hofer, W. Grogger, G. Kothleitner, P. Warbichler, Ultramicroscopy 67 (1997), p. 83