The research programme undertaken by the three partners has attempted to answer numerous questions related to the use of Fe Cr Al alloys for catalyst supports in automobile emission control systems. The minimum amounts of Al and Cr required to form a continuous layer of alumina during high temperature oxidation were found to be 1 and 12 weight % respectively. However, at these levels, the reserves particularly of aluminium are rapidly exhausted, this factor being especially important in the thin foils used for catalyst support systems. In order to withstand several hundreds of hours exposure at 1100 C, practical minimum values are 4 to 5 %A1 and 16 to 18%Cr. The effects of minor elements (S, Ce, La) were studied on a 22%Cr-5%A1 matrix, commonly used for electrical heating applications.
Bibliographic Reference: EUR 16078 FR (1997) 102pp., FS, ECU 18.50
Availability: Available from the (2)
ISBN: ISBN 92-828-1026-7
Record Number: 199711148 / Last updated on: 1997-09-23
Original language: fr
Available languages: fr