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US 10,501,373 B1Granted
Multi-phase ceramic system
AssigneeThe United States of America as represented by the Administrator of the National Aeronautics and Space Administration
InventorsFrederick Dynys, Ali Sayir
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Abstract
Systems, methods, and other embodiments associated with multi-phase ceramic composites are described herein. Specifically, a multi-phase ceramic composite having a microstructure having at least one solid-state lubricant phase and at least one wear resistant material phase.
Claims15
A method for making a multi-phase ceramic composite, the method comprising;
- providing a rare earth metal powder;
- providing an Al2O3 powder;
- mixing the rare earth metal powder first powder and the Al2O3 powder to form a mixed powder;
- drying the mixed powder;
- isostatically pressing the mixed powder to form a green component;
- and
- sintering the green component to form a sintered component;
- wherein the sintered component includes continuous networks of two phases, namely, a solid-state lubricant phase comprising gadolinium and a wear resistant phase comprising Al2O3, and wherein the two phases are randomly interspersed, wherein a molar ratio of the wear resistant phase to the solid state lubricant phase is between 0.3 and 2.0, wherein an entirety of the sintered component is constructed from constituents of the rare earth metal and Al2O3 powders.
5 more elements
A method for making a multi-phase ceramic composite, the method comprising;
- providing a Gd2O3 powder;
- providing an Al2O3 powder;
- mixing the Gd2O3 powder and the Al2O3 powder to form a mixed powder;
- drying the mixed powder;
- isostatically pressing the mixed powder to form a green component;
- and
- sintering the green component to form a sintered component;
- wherein the sintered component includes continuous networks of two phases, namely, a solid-state lubricant phase comprising Gd2O3 and a wear resistant phase comprising Al2O3, wherein the two phases are randomly interspersed throughout the multi-phase ceramic composite, wherein a molar ratio of the wear resistant phase to the solid state lubricant phase is between 0.3 and 2.0, wherein an entirety of the sintered component is constructed from constituents of the Gd2O3 powder and the Al2O3 powder.
5 more elements
Dependencies are inferred from the claim text.