\n\tWallwork Heat Treating Co., England, has developed Nitron CA, a PVD vacuum process in which a material comprised of chromium and aluminum bound with nitrogen is deposited on complex surfaces. Thicker than normal PVD films, the dense amorphous architecture of the coating provides an excellent environmental barrier.<\/p>\n
\n\tThe resulting film is said to have high hot hardness and good resistance to high-temperature oxidation, making it ideal for components in the hot section of the aero-engine, such as compressor blades\/vanes and engine ring seals.<\/p>\n
\n\tNitron CA also has a low coefficient of friction, which would enhance the performance of cylindrical roller thrust bearings. The lower sliding friction of the coated surface reduces the shear stresses in the slippage zones of bearing systems.<\/p>\n
\n\tThese conformal films can be applied to complex surfaces, and they impart a range of properties said to far exceed those of hard chrome plating.<\/p>\n