초록 ▼

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. Th

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.

대표청구항 ▼

[ What is claimed is:] [1.] A tubular-shaped component that contacts a silica-containing material, the component comprising a tungsten-based substrate and a rhenium-based layer on a surface thereof, the substrate and the layer having densities of at least 96% of their respective theoretical densitie

[ What is claimed is:] [1.] A tubular-shaped component that contacts a silica-containing material, the component comprising a tungsten-based substrate and a rhenium-based layer on a surface thereof, the substrate and the layer having densities of at least 96% of their respective theoretical densities.