Corrosion-resistant material for contact with high temperature m

Details Corrosion-resistant material for contact with high temperature m Corrosion-resistant material for contact with high temperature m

1995-02-22

1996-12-31

Jordan, Charles T.

Stock material or miscellaneous articles

All metal or with adjacent metals

Having metal particles

428551, 428552, 75228, 75230, 75232, B22F 100

Patent

active

055903924

ABSTRACT:
A corrosion-resistant material for the construction of a member destined to contact molten metal comprises a matrix of a refractory metal and a powder of the oxide of at least one metallic element selected from the group consisting of the same metallic element as the molten metal and metallic elements having lower levels of free energy for the formation of an oxide than the molten metal, the powder of the oxide being dispersed and disposed in the matrix. The refractory metal is W, Mo, Ta, Nb, or Re. The metal oxide is selected from the rare earth metal oxides, namely the oxides of the same metallic elements as the molten metals, and the oxides of Ti, Cr, and Zr. The corrosion-resistant material is produced by a method which comprises mixing a refractory metal powder with a powder of the oxide of at least one metallic element selected from the group consisting of the same metallic element as the molten metal and metallic elements having lower levels of free energy for the formation of an oxide than the molten metal and sintering the resultant mixture under a vacuum or in the atmosphere of an inert gas or in a reducing atmosphere.

REFERENCES:
patent: 3969278 (1976-07-01), Aksenov et al.
patent: 4861641 (1989-08-01), Foster et al.
patent: 4999336 (1991-03-01), Nadkarni et al.
patent: 5053074 (1991-10-01), Buljan et al.
Copy of Search Report issued by the U.K. Patent Office dated Jun. 20, 1995.

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