Sub-stoichiometric metal nitrides

Patent metadata

Field	Value
Publication number	US-11566203-B2
Application number	US-202017033014-A
Country	US
Kind code	B2
Filing date	Sep 25, 2020
Priority date	Sep 26, 2019
Publication date	Jan 31, 2023
Grant date	Jan 31, 2023

Abstract

A non-stoichiometric nanocomposite coating and method of making and using the coating. The non-stoichiometric nanocomposite coating is disposed on a base material, such as a metal or ceramic; and the nanocomposite consists essentially of a matrix of an alloy selected from the group of Cu, Ni, Pd, Pt and Re which are catalytically active for cracking of carbon bonds in oils and greases and a grain structure selected from the group of borides, carbides and nitrides.

First claim

The invention claimed is:

1. A super lubricious apparatus comprising:
a substrate;
a nanocomposite coating on the substrate, the nanocomposite consisting essentially of a matrix of a catalytically active element embedded in the matrix, the matrix selected from Cu, Ni, Pd, Pt and Re and mixtures thereof, and non-stoichiometric vanadium nitride grains;
a hydrocarbon lubricant; and
a carbon film disposed between the nanocomposite coating and the hydrocarbon lubricant.

2. The apparatus as defined in claim 1 , wherein the catalytically active element is about 1% to 10% by weight and the grains are from about 90% to 99% by weight.

3. The apparatus as defined in claim 1 , wherein the substrate is selected from the group of a metal and a ceramic.

4. The apparatus as defined in claim 1 , wherein the substrate comprises a steel based material.

5. The apparatus as defined in claim 1 , wherein the oil is essentially free of additives.

6. The apparatus as defined in claim 1 , wherein the carbon film consists essentially of diamond like carbon.

7. A method for lubricating materials in wear contact, comprising the steps of:
providing a base material;
disposing a non-stoichiometric nanocomposite coating on the base material, the nanocomposite consisting essentially of about 1% to 10% by weight a microstructural matrix of a catalytically active alloy with about 90% to 99% by weight grains embedded in therein, the microstructural matrix selected from the group of Cu, Ni, Pd, Pt and Re and mixtures thereof and vanadium nitride grains;
disposing an oil on the nanocomposite coating;
engaging the nanocomposite coating with a surface, the oil disposed therebetween;
cracking carbon bonds of the oil; and
forming a carbon film disposed between the coating and the layer, thereby lubricating the nanocomposite coating and underlying base material.

8. The method as defined in claim 7 , wherein the base material is selected from the group of a metal and a ceramic.

9. The method as defined in claim 7 , wherein the base material comprises a steel based material.

10. The method as defined in claim 7 , wherein the oil is essentially free of additives.

11. The method as defined in claim 7 , wherein the carbon film consists essentially of diamond like carbon.

12. The method as defined in claim 7 , wherein the grains are selected from the group of refractory metal carbides, carbo-nitrides, nitrides and borides.

13. The apparatus of claim 1 , wherein the vanadium nitride hard grains are non-stoichiometric.

14. The apparatus of claim 1 , wherein the catalytic soft grains are homogenously distributed on the nanocomposite coating.

15. The apparatus of claim 1 , wherein the nanocomposite coating is non-stoichiometric.

Assignees

• Uchicago Argonne Llc

Inventors

• Eryilmaz Osman Levent
• Dasilva Vanessa
• Erdemir Ali

Classifications

• C10M177/00 Primary

  Special methods of preparation of lubricating compositions; Chemical modification by after-treatment of components or of the whole of a lubricating composition, not covered by other classes · CPC title

• C10N2070/00

  Specific manufacturing methods for lubricant compositions · CPC title

• C23C30/005

  on hard metal substrates · CPC title

• C10N2030/06

  Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure · CPC title

• B01J37/0201

  Impregnation · CPC title