Effect of Gas Pressure and Temperature on Stereometric Properties of Al+Al₂O₃ Composite Coatings Deposited by LPCS Method

• Autorzy: Winnicki M. , Piwowarczyk T. , Małachowska A. , Ambroziak A.

Identyfikatory

DOI

10.2478/amm-2014-0149

Warianty tytułu

PL

Wpływ ciśnienia i temperatury gazu na właściwości stereometryczne kompozytowych warstw Al+Al₂O₃ naniesionych metodą LPCS

• Języki publikacji: EN

Abstrakty

EN

The paper deals with effect of working gas pressure and temperature on surface stereometry of coatings deposited by low-pressure cold spray method. Examinations were focused on aluminium coatings which are commonly used to protect substrate against corrosion. A commercial Al spherical feedstock powder with admixture of Al₂O₃ (Al + 60vol.-%Al₂O₃), granulation -50+10 µm, was used to coat steel, grade S235JR. Thedeposited coatings were studied to determine their stereometry, i.e. roughness, transverse and longitudinal waviness, topography of surface and thickness as the functions of gas pressure and temperature. A profilometer and focal microscope were used to evaluate the stereometric properties. In order to reduce the number of variables, the remaining process parameters, i.e. shape and size of de Laval nozzle, nozzle-to-substrate distance, powder mass flow rate, linear velocity of spraying gun, were kept unchanged. The investigation confirmed influence of temperature and pressure on coating thickness as well as on the surface seterometry.

PL

W pracy badano wpływ ciśnienia oraz temperatury gazu roboczego na stereometrię powierzchni warstw uzyskanych metodą niskociśnieniowego natryskiwania na zimno. W badaniach skupiono się na wykonaniu powłok aluminiowych, które są powszechnie stosowane w celu ochrony podłoża przed korozją. Wykorzystano komercyjny proszek sferyczny Al z domieszką Al₂O₃ (w proporcji obj. 40% Al / 60% Al₂O₃) o granulacji -50+10 µm, którym pokryto stal S235JR. Przeprowadzone analizy miały na celu określenie stereometrii otrzymanych warstw, tj. chropowatości, falistości poprzecznej oraz wzdłużnej, topografii powierzchni oraz grubości, w zależności od ciśnienia i temperatury gazu. Do analizy właściwości stereometrycznych wykorzystano profilografometr oraz mikroskop konfokalny. W celu ograniczenia ilości zmiennych, pozostałe parametry procesu, tj. kształt i rozmiar dyszy de Lavala, odległość dyszy od podłoża, masowe natężenie przepływu proszku, prędkość liniowa palnika, pozostawiono na stałym poziomie. Przeprowadzone badania potwierdziły wpływ temperatury oraz ciśnienia gazu na grubość naniesionych powłok, jak również na stereometrię ich powierzchni.

Słowa kluczowe

EN

cold spray; metal-matrix composite; roughness; waviness

PL

natryskiwanie na zimno; kompozyty z matrycą metalową; falistość; chropowatość

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2014
• Tom: Vol. 59, iss. 3
• Strony: 879--886
• Opis fizyczny: Bibliogr. 26 poz., rys., tab.

Twórcy

autor

Winnicki M.

• Wrocław University Of Technology, 5 Łukasiewicza Str., 50-371 Wrocław, Poland

autor

Piwowarczyk T.

• Wrocław University Of Technology, 5 Łukasiewicza Str., 50-371 Wrocław, Poland

autor

Małachowska A.

• Wrocław University Of Technology, 5 Łukasiewicza Str., 50-371 Wrocław, Poland

autor

Ambroziak A.

• Wrocław University Of Technology, 5 Łukasiewicza Str., 50-371 Wrocław, Poland

Bibliografia

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