USA as Represented by Secretary of the Navy

The United States of America as Represented by the Secretary of

Robert L Jones

Seth R Goldstein

Robert P Ingel

A composite structure includes a self-supporting substrate and a thermal barrier coating of zirconia stabilized with scandia and yttria. A method of protecting the surface of a self-supporting substrate from degradation caused by exposure to temperatures above 1200.degree. C. includes the step of applying to the surface a coating of zirconia stabilized with scandia and yttria.

Scandia, yttria-stabilized zirconia for ultra-high temperature thermal

A coating of india-stabilized zirconia protects a self-supporting substrate rom high temperatures, as well as vanadate and sulfate corrosion. In one method of making such a protected substrate, a coating of india-stabilized zirconia is applied to the substrate. The substrate can be a metal or ceramic surface of a gas turbine or other type of engine.

India-stabilized ziroconia coating for composites

India-stabilized zirconia coating for composites

This invention pertains to the use of tin oxide as a corrosion resistant erial for preventing or inhibiting high temperature corrosion by molten sulfate-vanadate deposits and gaseous sulfur trioxide formed in engines or other high temperature apparatus which burn materials containing sodium, sulfur, and vanadium.

Corrosion inhibition in high temperature environment

A coating of india-stabilized zirconia protects a self-supporting substrate from high temperatures, as well as vanadate and sulfate corrosion. In one method of making such a protected substrate, a coating of india-stabilized zirconia is applied to the substrate. The substrate can be a metal or ceramic surface of a gas turbine or other type of engine.

A scandia stabilized zirconia coating which is resistant to corrosion by sulfur and vanadium compounds at elevated temperatures. Scandia is present in the zirconia between about 4 to 8 mole percent. A composite formed from a coating of the stabilized zirconia on a substrate, such as a superalloy, is useful for turbine blades and engine pistons. Preferably, the coating is up to 10 mils thick.

Scandia-stabilized zirconia coating for composites

Disclosed is a method for obtaining access to a relatively inaccessible region of a blood vessel for diagnostic or therapeutic purposes in which a primary catheter tube is inserted into the vascular system at an entry point remote from the relatively inaccessible region, the leading end of the tube is worked towards the inaccessible region in a conventional manner and then a secondary catheter tube contained within the primary tube is everted from the leading end of the primary tube to approach more closely to the required region. A catheter assembly for performing the method is also disclosed.

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Fairfax Station, VA, United States of America

Robert L Jones