Multi-oxide coated carbide body and method of producing the same

Details Multi-oxide coated carbide body and method of producing the same Multi-oxide coated carbide body and method of producing the same

1990-07-13

1992-08-11

Robinson, Ellis P.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428212, 428336, 428408, 428469, 428472, 428698, 428699, 428701, 428702, 428704, B32B 900, B32B 1900

Patent

active

051377748

ABSTRACT:
Improved properties of aluminum oxide wear layers on cemented carbides and related substrates can be obtained by combining the two alumina polymorphs (.alpha.-Al.sub.2 O.sub.3 and kappa-Al.sub.2 O.sub.3) as multilayers. The nucleation of .alpha.-Al.sub.2 O.sub.3 and particularly kappa-Al.sub.2 O.sub.3 can be controlled by means of modification layers. According to this invention, it is thus possible to CVD-deposit an oxide multicoating layer consisting of clearly specified layers of .alpha.-Al.sub.2 O.sub.3 and kappa-Al.sub.2 O.sub.3. Preferably, .alpha.-Al.sub.2 O.sub.3 is deposited first by CVD on a TiC coated cemented carbide substrate followed by the said coating layer of kappa-Al.sub.2 O.sub.3.

REFERENCES:
patent: Re29420 (1977-09-01), Lindstrom et al.
patent: Re31526 (1984-02-01), Smith et al.
patent: Re32110 (1986-04-01), Hale
patent: 3640689 (1972-02-01), Glaski et al.
patent: 3836392 (1974-09-01), Lux et al.
patent: 4018631 (1977-04-01), Hale
patent: 4180400 (1979-12-01), Smith et al.
patent: 4239536 (1980-12-01), Yamamoto et al.
patent: 4357382 (1982-11-01), Lambert et al.
patent: 4619866 (1986-10-01), Smith et al.
Vuormen et al. "Characterization of .alpha.-Al.sub.2 O.sub.3, K-Al.sub.2 O.sub.3 and .alpha.-K Multioxide Coatings on Cemented Carbides" Thin Solid films, 193/194 (1990) pp. 536-546.
Chatfield "Characterization of the Interfaces in Chemical Vapors Deposited Coatings on Cemented Carbides" RM & HM Sep. 1990, pp. 132-138.

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