High temperature cesium-containing solid lubricant
AssigneeThe United States of America as represented by the Secretary of the Air Force
InventorsNelson H. Forster, James P. King, Lewis Rosado, Christopher J. Klenke
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Abstract
A method for lubricating a ceramic bearing surface which comprises applying a cesium-containing compound selected from the group consisting of Cs.sub.2 MoO.sub.4, Cs.sub.2 SO.sub.4, Cs.sub.2 WO.sub.4, Cs.sub.2 WOS.sub.3, Cs.sub.2 MoOS.sub.3 and CsOH, to the bearing surface and heating the thus-coated bearing surface to a temperature of about 300.degree. C. or greater. Alternatively, the cesium-containing compound may be applied in admixture with a lower alkali metal silicate. This method is particularly useful for lubricating the bearings in expendable, high temperature turbine engines, such as those used in expendable missiles.
Claims4
A method for lubricating a silicon-containing ceramic bearing surface which comprises applying a cesium-containing compound selected from the group consisting of Cs.sub.2 MoO.sub.4, Cs.sub.2 SO.sub.4, Cs.sub.2 WO.sub.4 and CsOH, to the bearing surface and heating the thus-coated bearing surface to a temperature of about 300.degree. C. or greater.
A method for lubricating a ceramic bearing surface which comprises applying a mixture of an alkali metal silicate binder and a cesium-containing compound selected from the group consisting of Cs.sub.2 MoO.sub.4, Cs.sub.2 SO.sub.4, Cs.sub.2 WO.sub.4, Cs.sub.2 WOS.sub.3, Cs.sub.2 MoOS.sub.3 and CsOH, to the bearing surface and heating the thus-coated bearing surface to a temperature of about 300.degree. C. or greater, wherein said alkali metal silicate binder is selected from the group consisting of sodium silicate, lithium silicate and potassium silicate.
Dependencies are inferred from the claim text.