Rhenium-coated tungsten-based alloy and composite articles and m

Details Rhenium-coated tungsten-based alloy and composite articles and m Rhenium-coated tungsten-based alloy and composite articles and m

1998-12-03

2000-12-19

Jones, Deborah

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

428665, 65492, B32B 1504, C03B 37083

Patent

active

061625523

ABSTRACT:
A furnace component having a tungsten-based substrate whose surface is protected by a rhenium-based layer in order to render the component less reactive to quartz, glass and other forms of silica. The layer preferably consists essentially of rhenium or rhenium with alloying additions of tungsten. The substrate may be formed of concentric layers of different tungsten-based alloys in order to tailor the physical and mechanical properties of the component. A preferred method of forming the rhenium layer is to wrap the substrate with a rhenium-based wire, and then heat the wire and substrate to sinter and bond the wire to the substrate. Alternatively, the substrate and rhenium layer can be formed by isostatic pressing. Both methods are performed so that the substrate and layer have densities of at least about 96% of their respective theoretical densities.

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"Diffusion Layer at the Interface of W/Re-Composite Nozzles", by Yin Weihong et al., High Temeperatures-High Pressures, 1994, vol. 26, pp. 115-121 (No Month).

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