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Aluminide protective coatings on steels by sintering of powder filled pastes

Fertigung von Aluminid-Schutzüberzügen auf Stählen durch Sinterung von pulvergefüllten Pasten
 
: Veltl, G.; Drescher, C.; Petzoldt, F.; Busse, M.

European Powder Metallurgy Association -EPMA-:
PM in Mannheim, in the industrial heartland of Europe. Proceedings. Vol.1: Sintered steels (PM low alloyed steels, PM stainless steels) : PM tool materials (hard materials & diamond tools, PM tool steels) ; PM advanced materials ; PM applications : International Powder Metallurgy Congress & Exhibition ; Euro PM 2008 ; 29th September - 1st October 2008, Rosengarten Congress Centre, Mannheim, Germany
Shrewsbury: EPMA, 2008
ISBN: 978-1-89907-203-3
S.3-8
International Powder Metallurgy Congress & Exibition (EURO PM) <2008, Mannheim>
Englisch
Konferenzbeitrag
Fraunhofer IFAM ()
Korrosionsschutzschicht; Aluminid; Stahlsubstrat; nichtrostender Stahl; Sinterstahl; Blech; Pulvermetallurgie; Paste; Aluminium; Schablonendruck; Heißgaskorrosion; Reaktionsprodukt; Mikrostruktur; thermodynamisches Modell; Modellrechnung; Zustandsdiagramm; Röntgenbeugung; Rasterelektronenmikroskopie (REM); energiedispersive Röntgenspektrometrie (EDXS); Anwendung im Fahrzeugbau

Abstract
There are some applications of PM(powder metallurgy)-parts requiring good resistance against hot gas corrosion. Among these are parts for the exhaust gas systems of automobiles. To improve resistance against hot gas corrosion, aluminide coatings are a promising candidate material. Here investigations are presented for sintered aluminide coatings produced from powder filled pastes applied to PM-parts as well as to massive metal sheet material. Thermodynamic calculations of the aluminide formation are presented along with results of X-ray diffraction and metallographic investigations. The hot gas resistance is examined under air at different temperatures. The base materials under investigation are stainless steels 410L and 316L. Integration of sintered coatings derived from powder filled pastes into the ordinary powder metallurgical production route without additional production steps is discussed.

: http://publica.fraunhofer.de/dokumente/N-94249.html