US 4,446,242 A · Synthesis of refractory materials

Abstract

Refractory metal nitrides are synthesized during a combustion process utilizing a solid source of nitrogen. For this purpose, a metal azide is employed. The azide is combusted with a transition metal of the IIIB, IVB group, or a rare earth metal, and ignited to produce the refractory material.

Claims20

Dependent claims

A method of synthesizing refractory nitride compositions, comprising:

(a) mixing a metal azide with at least a stoichiometric amount of a transition metal of the IIIB, IVB groups, a rare earth metal or a mixture thereof;
(b) igniting the resulting mixture of step (a);
and
(c) forming a refractory nitride composition.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

06/470,115Filed 28 Feb 1983

Granted

1 May 1984

Term ends

Not estimatedThe source records don’t support an estimate.

Classification17 codes

C04B 35/58007
Based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides: based on refractory metal nitrides
C01B 21/06
Nitrogen; Compounds thereof: binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of…
C01B 21/0602
Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one…:…
C01B 21/063
With transition metals other than titanium, zirconium or hafnium: with one or more actinides, e.g. UN, PuN

Abstract

Claims20

Dependent claims

A method of synthesizing refractory nitride compositions, comprising:

(a) mixing a metal azide with at least a stoichiometric amount of a transition metal of the IIIB, IVB groups, a rare earth metal or a mixture thereof;
(b) igniting the resulting mixture of step (a);
and
(c) forming a refractory nitride composition.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

06/470,115Filed 28 Feb 1983

Granted

1 May 1984

Term ends

Not estimatedThe source records don’t support an estimate.

Classification17 codes

C04B 35/58007
Based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides: based on refractory metal nitrides
C01B 21/06
Nitrogen; Compounds thereof: binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of…
C01B 21/0602
Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one…:…
C01B 21/063
With transition metals other than titanium, zirconium or hafnium: with one or more actinides, e.g. UN, PuN

Synthesis of refractory materials

Life of this patent

Abstract

Claims20

Synthesis of refractory materials

Life of this patent

Abstract

Claims20