High-hardness abrasive product based on alumina and aluminium ox

Details High-hardness abrasive product based on alumina and aluminium ox High-hardness abrasive product based on alumina and aluminium ox

1980-07-03

1982-07-27

Czaja, Donald E.

Abrasive tool making process, material, or composition

With inorganic material

Metal or metal oxide

51307, 501 87, C04B 3116

Patent

active

043415334

ABSTRACT:
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 Al.sub.2 O.sub.3 - Al.sub.4 O.sub.4 C or Al.sub.2 O.sub.3 - Al.sub.2 OC.

REFERENCES:
patent: 3580708 (1971-05-01), Ogawa et al.
patent: 3615307 (1971-10-01), Jones
patent: 3615308 (1971-10-01), Amero
patent: 3792553 (1974-02-01), Schleifer et al.
patent: 4059417 (1977-11-01), Ilmaier et al.
patent: 4063908 (1977-12-01), Ogawa et al.
Journal American Ceramic Society, vol. 39, No. 1, 1956, pp. 1-11.
C. Ragon, L. Belon and H. Forestier, "Revue de Metallurgie", Paris, Jun. 1969, pp. 471-476.

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