Surface Engineered Products Corporation

Litton Systems, Inc.

Radhakrishna Chakravarthy Mandyam

Andrew George Wysiekierski

Sabino Steven Anthony Petrone

Leo K Lam

William P Debley

Gary Anthony Fisher

Dhirubhai Patel

Sabino Steven Petrone

There is provided a surface alloyed component which comprises a base alloy with a diffusion barrier layer enriched in silicon and chromium being provided adjacent thereto. An enrichment pool layer is created adjacent the diffusion barrier and contains silicon and chromium and optionally titanium or aluminum. The method comprises depositing a surface alloy on the base alloy at a temperature in the range of 400 to 1000&deg; C. and heat treating the surface alloy at a ramp temperature rate of at least 5C&deg;/minute, preferably 10 to 20&deg; C./minute, to a desired maximum temperature at which the surface alloyed component is maintained for a time sufficient to provide the enrichment pool or the enrichment pool with a diffusion barrier layer. A reactive gas treatment may be used to generate a replenishable protective oxide scale of alumina or chromia on the outermost surface of the surface alloyed component.

Surface alloyed high temperature alloys

The present invention provides a method for shaping a mask to reduce coating non-uniformity in the radial direction. A test run of the ion beam sputtering system coats a stationary glass plate having the same area and shape as the platen. The resulting coating thickness is measured across the surface of the glass plate and plotted as a function of position. This is the plot of the flux distribution. The coating rate pattern is determined by coating thickness by coating time. The desired width of the mask, which takes the form of a segment of a radial band is adjusted to obtain the desired average coating rate for the entire segment, masked and unmasked. This is repeated for each radial band. All these radial widths put together design the functional form of the mask, the use of which provides a uniform coating of the platen in a radial direction.

Method of shaping a flux mask and process of sputtering with the shaped flux mask

There is provided a surface alloyed component which comprises a base alloy with a diffusion barrier layer enriched in silicon and chromium being provided adjacent thereto. An enrichment pool layer is created adjacent said diffusion barrier and contains silicon and chromium and optionally titanium or aluminum. A reactive gas treatment may be used to generate a replenishable protective scale on the outermost surface of said component.

Surfaced alloyed high temperature alloys

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Agoura Hills, CA, United States of America

Radhakrishna Chakravarthy Mandyam