Bearings, coating

In this particular example as in many others, a proper analysis of cost is a crucial factor. An example is the production of balls for ball bearings. Coated ball bearings (or monolithic silicon nitride) greatly outperform steel balls but their cost is considerably higher. Steel balls in passenger-automobile applications are satisfactory and normally last the life of the car and the far-longer life of the ceramic balls is not needed. 

Fishman, N. S., Rice, C. A., Breit, G. N. JOHNSON, R. D. 1999. Sulfur-bearing coatings on fly ash from a coal-fired power plant composition, origin, and influence on ash alteration. Fuel, 78, 187-196. 

Heparin Bearing Coatings or Surfaces Quantitative Relations... 

Titanium carbide Coatings for cutting and milling tools, coatings for ball bearings, coatings for extrusion nozzles. 

Where unfavorable combinations of chemical, mechanical, and physical environments may preclude the use of other materials, PVF has been successfully used, as for valve and pump parts, heavy wall pipe fittings, gears, cams, bearings, coatings, and electrical insulation. Its limitations include lower service temperatures than the highly fluorinated fluoropolymers, not having antistick qualities, and the fact that it produces toxic products upon thermal decomposition. 

Mouldings, composites, bearings, coatings very high continuous use temperature... 

Other development issues included a cast to wrought Nl-base superalloy pressure boundary joint, an electrical pressure boundary penetration seal, and corrosion due to interactions between the alternator and bearing coating materials with other materials in the closed gas loop. 

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