Refractory metal boride ceramics and methods of making thereof

Patent metadata

Field	Value
Publication number	US-9637416-B2
Application number	US-201615266194-A
Country	US
Kind code	B2
Filing date	Sep 15, 2016
Priority date	Jan 26, 2012
Publication date	May 2, 2017
Grant date	May 2, 2017

Abstract

A composition having nanoparticles of a refractory-metal boride and a carbonaceous matrix. The composition is not in the form of a powder. A composition comprising a metal component, boron, and an organic component. The metal component is nanoparticles or particles of a refractory metal or a refractory-metal compound capable of decomposing into refractory metal nanoparticles. The organic component is an organic compound having a char yield of at least 60% by weight or a thermoset made from the organic compound. A method of combining particles of a refractory metal or a refractory-metal compound capable of reacting or decomposing into refractory-metal nanoparticles, boron, and an organic compound having a char yield of at least 60% by weight to form a precursor mixture. A composition having nanoparticles of a refractory-metal boride that is not in the form of a powder.

First claim

What is claimed is:

1. A composition comprising:
a metal component selected from:
nanoparticles or particles of a refractory metal; and
a refractory-metal compound capable of decomposing into refractory-metal particles;

elemental boron; and
an organic component selected from:
an organic compound having a char yield of at least 60% by weight; and
a thermoset made from the organic compound.

2. The composition of claim 1 , wherein the refractory metal is titanium.

3. The composition of claim 1 , wherein the refractory metal is a group IV-VI transition metal.

4. The composition of claim 1 , wherein the metal component is a salt of the refractory metal, a hydride of the refractory metal, a carbonyl compound of the refractory metal, a halide of the refractory metal, or particles of the refractory metal.

5. The composition of claim 1 , wherein the organic compound:
contains only carbon and hydrogen;
contains aromatic and acetylene groups;
contains only carbon, hydrogen, and nitrogen or oxygen;
contains no oxygen; or
contains a heteroatom other than oxygen.

6. The composition of claim 1 , wherein the organic compound is 1,2,4,5-tetrakis(phenylethynyl)benzene or a prepolymer thereof, 4,4′-diethynylbiphenyl, N, N′-(1,4-phenylenedimethylidyne)-bis-(3-ethynylaniline), dianilphthalonitrile, or resorcinol phthalonitrile or a prepolymer thereof.

7. The composition of claim 1 , wherein the metal component and the organic component are the same compound.

8. The composition of claim 1 , wherein the boron and the refractory-metal compound or particles of refractory metal are dispersed in the thermoset.

9. The composition of claim 1 , wherein the composition comprises fibers.

10. The composition of claim 1 , wherein the refractory metal is zirconium, hafnium, tungsten, niobium, molybdenum, chromium, tantalum, or vanadium.

11. The composition of claim 1 , wherein the metal component is tungsten powder, tantalum powder, titanium hydride, zirconium hydride, or hafnium hydride.

12. The composition of claim 1 , wherein the composition comprises carbon fibers, ceramic fibers, or metal fibers.

Assignees

• Us Navy

Inventors

• Keller Teddy M
• Saab Andrew P
• Laskoski Matthew

Classifications

• C04B2235/5248

  Carbon, e.g. graphite · CPC title

• C04B2235/6562

  Heating rate · CPC title

• C04B35/80

  Fibres, filaments, whiskers, platelets, or the like · CPC title

• B82Y30/00

  Nanotechnology for materials or surface science, e.g. nanocomposites · CPC title

• C04B2235/422

  Carbon · CPC title