Download Materials Aspects in Automotive Catalytic Converters by Hans Bode PDF

By Hans Bode

MACC 2001 is the successor assembly of the 1st overseas convention on fabrics elements in automobile Catalytic Converters, MACC '97, and concentrates at the high-temperature mechanical and oxidation behaviour of either metal-supported and ceramic-supported car catalysts. The metal-supported catalyst is predicated on a ferritic metal with 5-8% aluminium, 17-22% chromium and small additions of reactive components. greater than 20,000,000 devices have been produced in 1999. The ceramic-supported catalytic converter relies on corderite. The construction cost of ceramic-supported catalysts is far larger. either fabrics have particular benefits and downsides which be certain the appliance for a given vehicle version. as well as those easy teams of catalytic providers, the scope of the convention additionally refers to coating points, because the impression of the coating composition is turning into a growing number of very important. the automobile and car-supplying industries record on their destiny standards with admire to functionality and repair existence. keeping strong functionality is essential fairly within the view of thinner helps and better temperatures. provider existence predictions, in response to modelling and simulation recommendations, depends upon trustworthy fabrics' information. This quantity will accordingly be necessary to all scientists and engineers serious about the layout and improvement of car catalysts.

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Bennett, J. R. Nicholls, D. Naumenko and W. J. Quadakkers, “Mechanistic Understanding of Chemical Failure for FeCrAl-RE Alloys in Oxidising Environments” in “Lifetime Modelling of High Temperature Corrosion Processes”, (eds M. Schutze, W. J. Quadakkers and J. R. Nicholls) EFC publication 28, IoM Communications, London (2001). High Temperature Corrosion of FeCrAlY/Aluchrom YHf in Environments Relevant to Exhaust Gas Systems Angelika Kolb-Telieps1), Gernot Strehl2) , Dmitry Naumenko3), Willem. J.

L. Smialek, “Sulphur Impurities and the Microstructure of Alumina Scales” in “Microscopy of Oxidation-3” (eds S. B. Newcomb and J. A. Little), p127, Institute of Materials, London, (1997). [36] B. Pint, Oxid. Met. 45, 1 (1996). [37] J. Klower and J. G. Li, Materials and Corrosion 47, 545 (1996). [38] P. A. Van Manen, E. W. A. Young, D. Schlakoord, C. J. an der Wekken and J. H. W. de Wit, Surface and Interface Analysis 12, 391 (1988). [39] W. J. Quadakkers and L. Singheiser, “Practical Aspects of the Reactive Element Effect”, in “High Temperature Corrosion”, Les Embiez, France, (May 2000).

Nicholls* and W. J. Quadakkers *Cranfield University, Cranfield, Bedford, UK Forschungszentrum Juelich, Juelich, Germany 1 Abstract Metal supported automotive catalytic converter bodies are based on ferritic steels, with 5–8wt%Al, 17–22wt%Cr plus small additions of reactive elements. To improve the catalyst performance there is a continued drive towards higher operating temperatures, thinner components and alternative geometries offering large surface area to volume ratios. Maintaining acceptable component lives is mandatory, even when thinner support geometries and higher operating temperatures are envisaged.

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