High-hardness abrasive product based on alumina and aluminium oxycarbides and process for preparing same

摘要

The invention relates to a new class of high-hardness abrasive products and wear resistant parts based on alumina and aluminium oxycarbides. By fusing alumina in the presence of a carbonaceous substance and by controlled cooling, it is possible to obtain a large number of products in which the ratio rho of the number of carbon atoms to the number of carbon atoms plus oxygen atoms is between 0.01 and 0.50, and preferably between 0.02 and 0.20. These products are essentially constituted by primary alumina crystals in a eutectic matrix Al2O3 - Al4O4C or Al2O3 - Al2OC.