FIBRE-REINFORCED COMPOSITE CERAMICS INFILTRATED WITH MOLTEN METAL

摘要

The invention concerns fibre-reinforced composite ceramics infiltrated with molten metal and comprising high-temperature fibres in particular based on Si/C/B/N, which are bound in terms of reaction to an Si- based matrix. The invention also concerns a method of producing such ceramics. The molten silicon used for infiltration purposes contains additions of iron, chromium, titanium, molybdenum, nickel or aluminium, molten silicon containing approximately 5 to 50 weight % iron and approximately 1 to 10 weight % chromium being particularly preferred. The production method is simpler than conventional molten silicon infiltration methods and imparts improved properties to the composite ceramics.