Preparation of titanium nitride-containing refractory material composites

Claim 2

A process for preparing a titanium nitride-containing refractory material solid composite, comprising the steps of: A) contacting a titanium tetrahalide with a disilazane at a temperature and for a period of time sufficient to prepare a titanium-containing organometallic precursor; B) mixing the titanium-containing organometallic precursor with a refractory material powder, the weight ratio of titanium-containing organometallic precursor to refractory material powder being from about 1:50 to about 1:1; C) heating the mixture of titanium-containing organometallic precursor and refractory material powder in an inert atmosphere to a temperature of at least about 600° C. and for a period of time sufficient to pyrolyze the precursors; and D) further heating the pyrolyzed mixture at a temperature of at least about 1,600° C. to densify the pyrolyzed mixture to a solid composite.

Claim 3

The process for preparing a titanium nitride-containing refractory material composite according to claim 1, wherein the titanium tetrahalide comprises titanium tetrachloride.

Claim 4

The process for preparing a titanium nitride-containing refractory material composite according to claim 1, wherein the disilazane comprises hexamethyldisilazane.

Claim 5

The process for preparing a titanium nitride-containing refractory material composite according to claim 1, wherein the mole ratio of titanium tetrahalide to disilazane is from about 1:0.5 to about 1.3.

Claim 6

The process for preparing a titanium nitride-containing refractory material composite according to claim 4, wherein the mole ratio is from about 1:1 to about 1:2.

Claim 7

The process for preparing a titanium nitride-containing refractory material composite according to claim 1, wherein step A is conducted in the presence of a solvent.

Claim 8

The process for preparing a titanium nitride-containing refractory material composite according to claim 1, wherein step A is conducted at temperature from about -100° C. to about 100° C.

Claim 9

The process for preparing a titanium nitride-containing refractory material composite according to claim 1, wherein the refractory material powder comprises Si 3 N 4 .

Claim 10

A process for preparing a titanium nitride-containing refractory material composite, comprising the steps of: A) contacting a titanium tetrahalide with a disilazane, the mole ratio of titanium tetrahalide to disilazane being from about 1:0.5 to about 1:3, optionally in the presence of a solvent, at a temperature from about -100° C. to about 100° C. and for a period of time sufficient to prepare a titanium-containing organometallic precursor; B) mixing the titanium-containing organometallic precursor with a refractory material powder, the weight ratio of titanium-containing organometallic precursor to refractory material powder being from about 1:50 to about 1:1; C) heating the mixture of titanium-containing organometallic precursor and refractory material powder in an inert atmosphere to a temperature of at least about 600° C. for a period of time sufficient to pyrolyze the precursor; and D) further heating the pyrolyzed mixture at a temperature of at least about 1,600° C. to densify the pyrolyzed mixture to a solid composite.

Claim 11

A process for preparing a titanium nitride-containing refractory material composite, comprising the steps of: A) contacting a titanium tetrahalide with a disilazane, the mole ratio of titanium tetrahalide to disilazane being from about 1:0.5 to about 1:3, optionally in the presence of a solvent, at a temperature from about -100° C. to about 100° C. and for a period of time sufficient to prepare a titanium-containing organometallic precursor; B) mixing the titanium-containing organometallic precursor with a refractory material powder, the weight ratio of titanium-containing organometallic precursor to refractory material powder being from about 1:50 to about 1:1; C) heating the mixture of titanium-containing organometallic precursor and refractory material powder in an inert atmosphere to a temperature of at least about 600° C. for a period of time sufficient to pyrolyze the precursor; and D) further heating the pyrolyzed mixture at a temperature of at least about 1,600° C. to densify the pyrolyzed mixture to a solid composite.

Claim 12

The process for preparing a titanium nitride-containing refractory material composite according to claim 9, wherein the titanium tetrahalide comprises titanium tetrachloride.

Claim 13

The process for preparing a titanium nitride-containing refractory material composite according to claim 9, wherein the disilazane comprises hexamethyldisilazane.

Claim 14

The process for preparing a titanium nitride-containing refractory material composite according to claim 9, wherein the mole ratio of titanium tetrahalide to disilazane is from about 1:1 to about 1:2.

Claim 15

The process for preparing a titanium nitride-containing refractory material composite according to claim 9, wherein the refractory material powder comprises Si 3 N 4 .

Claim 16

A process for preparing a Si 3 N 4 --TiN composite, comprising the steps of: A) contacting titanium tetrachloride with hexamethyldisilazane, the mole ration of titanium tetrahalide to hexamethyldisilazane being from about 1:1 to about 1:2, optionally in the presence of a solvent, at a temperature from about -100° C. to about 100° C. and for a period of time sufficient to prepare a titanium-containing organometallic precursor; B) mixing the titanium-containing organometallic precursor with Si 3 N 4 . the weight ratio of titanium-containing organometallic precursor to Si 3 N 4 being from about 1:50 to about 1:1; C) heating the mixture of titanium-containing organometallic precursor and Si 3 N 4 in an inert atmosphere to a temperature of at least 600° C. for a period of time sufficient to pyrolyze the precursor; and D) further heating the pyrolyzed mixture at a temperature of at least about 1,600° C. to densify the pyrolyzed mixture to a solid composite.

Claim 17

A process for preparing a Si 3 N 4 --TiN composite, comprising the steps of: A) contacting titanium tetrachloride with hexamethyldisilazane, the mole ration of titanium tetrahalide to hexamethyldisilazane being from about 1:1 to about 1:2, optionally in the presence of a solvent, at a temperature from about -100° C. to about 100° C. and for a period of time sufficient to prepare a titanium-containing organometallic precursor; B) mixing the titanium-containing organometallic precursor with Si 3 N 4 . the weight ratio of titanium-containing organometallic precursor to Si 3 N 4 being from about 1:50 to about 1:1; C) heating the mixture of titanium-containing organometallic precursor and Si 3 N 4 in an inert atmosphere to a temperature of at least 600° C. for a period of time sufficient to pyrolyze the precursor; and D) further heating the pyrolyzed mixture at a temperature of at least about 1,600° C. to densify the pyrolyzed mixture to a solid composite.