초록 ▼

Erosion resistance is imparted to a metallic substrate without an attendant loss of fatigue life in the substrate by applying to the substrate a first layer comprising palladium, platinum or nickel in direct contact with the substrate and then applying a second layer which overcoats the first layer,

Erosion resistance is imparted to a metallic substrate without an attendant loss of fatigue life in the substrate by applying to the substrate a first layer comprising palladium, platinum or nickel in direct contact with the substrate and then applying a second layer which overcoats the first layer, the second layer being comprises of a tungsten-carbon alloy or a material formed of a tungsten matrix having dispersed tungsten-carbon compound phases therein. In another embodiment erosion resistance is imparted by employing a coating which comprises a first ductile layer on the substrate of palladium, platinum or nickel; a second layer comprising substantially pure tungsten; and a third layer comprising a material formed of a tungsten-carbon alloy or a material formed of a tungsten matrix having dispersed tungsten-carbon compound phases.

대표청구항 ▼

A method for imparting erosion-resistance to a metallic substrate without an attendant loss in the fatigue life of the substrate which comprises applying to the substrate a first ductile layer having a thickness between about 0.1 and 1.5 mils comprising palladium, or platinum in direct contact with

A method for imparting erosion-resistance to a metallic substrate without an attendant loss in the fatigue life of the substrate which comprises applying to the substrate a first ductile layer having a thickness between about 0.1 and 1.5 mils comprising palladium, or platinum in direct contact with the substrate and then applying at substantially low temperatures within the range of about 200°C. to about 700°C. second and third layers which overcoat the first layer, the second layer having a thickness between about 0.5 and 1.5 mils and being comprised of substantially pure tungsten; the third layer having a thickness between about 0.2 and 3 mils and being comprised of a material formed of a tungsten-carbon alloy or a material formed of a tungsten matrix having dispersed tungsten-carbon phases therein, the first layer capable of retaining substrate integrity and preventing diffusion of material from the third layer into the substrate.