Objetivo The influence of grain size reduction from the usual um sized to the nm-size range of austenitic-ferritic stainless steels is of great interest. It is especially the physical-mechanical and the corrosive properties that are improved by such a reduction of grain sizes.The aim of this project is the targeted development of a method to produce this kind of nanocrystalline (nc) materials by a powder metallurgical route based on the pressure sintering of ultrafine powders. Stainless steel (ss) powders in the grain size range of 10 - 100 nm are prepared by the impulse plasma channel method. The primary particles of such powders are either ferritic (a phase or austenitic g phase). The relative concentration of these phases determines the corrosive properties of the consolidated P/M product. It is the purpose of this study to investigate the role of atomic diffusion on the phase transformation process in these nanocrystals in order to be able to tailor the phase ratio a/g after consolidation. For this purpose nc-ss powders will be coated. The diffusion profiles after heat treatment will be correlated with the resulting microstructure, especially the a/g phase ratio. Programa(s) IC-INTAS - International Association for the promotion of cooperation with scientists from the independent states of the former Soviet Union (INTAS), 1993- Tema(s) 15 - Condensed Matter Physics Convocatoria de propuestas Data not available Régimen de financiación Data not available Coordinador Fraunhofer Institute for Applied Materials Research Aportación de la UE Sin datos Dirección Lesumer Heerstraße 36 28717 Bremen Alemania Ver en el mapa Coste total Sin datos Participantes (4) Ordenar alfabéticamente Ordenar por aportación de la UE Ampliar todo Contraer todo Centre National de la Recherche Scientifique Francia Aportación de la UE Sin datos Dirección 13397 Marseille Ver en el mapa Coste total Sin datos Kharkov State University Ucrania Aportación de la UE Sin datos Dirección 310077 Kharkov Ver en el mapa Coste total Sin datos Moscow Institute of Steel and Alloys Rusia Aportación de la UE Sin datos Dirección 117936 Moscow Ver en el mapa Coste total Sin datos Scientific Research Institute ULTRAM Rusia Aportación de la UE Sin datos Dirección 103030 Moscow Ver en el mapa Coste total Sin datos