Processing of non-oxide ceramics from sol-gel methods
AssigneeLawrence Livermore National Security, LLC
InventorsRichard Landingham, Robert A. Reibold, Joe Satcher, JR.
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Abstract
A general procedure applied to a variety of sol-gel precursors and solvent systems for preparing and controlling homogeneous dispersions of very small particles within each other. Fine homogenous dispersions processed at elevated temperatures and controlled atmospheres make a ceramic powder to be consolidated into a component by standard commercial means: sinter, hot press, hot isostatic pressing (HIP), hot/cold extrusion, spark plasma sinter (SPS), etc.
Claims39
A method, comprising:
- a) forming an intimate mixture of an inorganic oxide and an organic polymer,
- b) reaction heat treating the mixture to form particles of a non-oxide ceramic;
- and
- c) consolidating the particles into a solid ceramic object,
- wherein the solid ceramic object is characterized by a domain size of 100 nm or less.
A method comprising
- a) reacting first starting monomers of a first sol gel in a solution;
- b) reacting second starting monomers of a second sol gel in the solution;
- c) reacting the first and second starting monomers until at least one of the first sol gel and second sol gel is formed in the solution to form a gel mixture;
- d) removing the solvent from the gel mixture to form a mixture of inorganic oxide and organic polymer;
- and
- e) reaction heat treating the mixture to form particles of a non-oxide ceramic selected from carbides, nitrides, and borides.
A method comprising
- a) forming a first gel comprising an inorganic oxide in a solution;
- b) forming an second gel comprising an organic polymer in the solution to form a gel mixture;
- c) removing the solvent from the gel mixture to form a mixture of a inorganic oxide and organic polymer;
- and
- d) reaction heat treating the mixture to form particles of a non-oxide ceramic selected from carbides, nitrides, and borides.
A powder comprising particles of non-oxide ceramics selected from carbides, nitrides, and borides, wherein the particles are characterized by a domain size of 100 nm or less.
Dependencies are inferred from the claim text.