Ion Beam Deposited Metal Oxide and Fluoride Composite Coatings for High Temperature Tribological Applications
Final rept. 1 Sep 97-31 Aug 98
TECHNOLOGY ASSESSMENT AND TRANSFER INC ANNAPOLIS MD
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Wide temperature, solid lubricant films offer payoffs for military turbomachinery components rub seals, face seals, fretting interfaces and bearings. Multilayer films of B4CMo, B4CCr, ZnW, NiTi, AuCr, WMoS and AlCuFeCr films were deposited by planar magnetron sputtering or ion bombardment assisted deposition IBAD, and evaluated for adhesion, friction and wear properties from room temperature to as high as 1100 deg F. Oxidized ZnW and WMoS2 films exhibited low friction coefficients at room temperature. However, only AlFeCuCr quasicrystalline films consistently produced low friction coefficients at high temperature, suggesting that these films warrant further investigation. High friction coefficients obtained with IBAD Ni-Ti films at 1100 deg F were especially puzzling given previous Southwest Research Institute results that showed low friction values at high temperature.
- Coatings, Colorants and Finishes
- Lubricants and Hydraulic Fluids