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2006
Journal Article
Titel
Neue Materialklasse für die Dieselpartikelfiltartion. Metallschaum auf der Basis von Ni-superalloys
Alternative
New material class for diesel particle filtration. Metal foam based on Ni superalloys
Abstract
For particle filtration in the high temperature range such as in a corrosive environment, reliable temperature and corrosion resistant metal foam materials are sought. The best example for this is the diesel soot particle filter. Awarded with the "prize for innovative material of construction use 2005" the newly developed metal foam sets a new level of performance based on Ni superalloys. For uses at over 500°C, acidic and oxidative atmospheres, long term stability under mechanical and thermal fluctuating loads in passenger cars, trucks, buses, diesel locomotives, and ship diesel engines, in chemical facilities and catalysis engineering, the Fraunhofer-Institut Fertigungstechnik Angewandte Materialforschung (IFAM) Dresden developed jointly with the Inco GmbH of Munich a filtration material based on Ni superalloys (Incofoam® HighTemp). This material has been produced in Germany since the start of 2006 and is used by customers in the fields of interest of filters, engines , vehicles, and chemical facility construction. The metal foam is supplied at 1-3 mm thickness such that cutting, stacking, and shaping through bending before or after delivery can be effected. Some requirements of the foam material are low density of less than 1 g/cu cm, variable open porosity of 20-95%, maximum flexibility, high tensile strength of at least 8 MPa, temperature resistance to at least 800°C also under thermal fluctuating loads, and corrosion stability of at least 50 hr at 1% sulfuric acid at room temperature and at 80°C. The manufacturing process for metal foam is described.