Modified oxide surface treatment layer for alloys and corresponding methods

Patent metadata

Field	Value
Publication number	US-11773494-B2
Application number	US-201916569994-A
Country	US
Kind code	B2
Filing date	Sep 13, 2019
Priority date	Sep 13, 2018
Publication date	Oct 3, 2023
Grant date	Oct 3, 2023

Abstract

A surface treatment layer for a titanium-containing substrate includes a disordered metal oxide lattice having metal nitride compounds doped in the disordered metal oxide lattice. A method of surface treating a metal substrate includes introducing oxygen to a titanium-containing substrate to thereby form an oxide layer within the titanium-containing substrate, and, after the step of introducing oxygen, introducing nitrogen to the titanium-containing substrate to thereby modify the oxide layer to form a surface treatment layer.

First claim

What is claimed is:

1. A surface treatment layer for a titanium-containing substrate comprising a disordered metal oxide lattice having metal nitride compounds doped in the disordered metal oxide lattice, wherein the surface treatment layer has a thickness of from about 1 μm to about 15 μm and a hardness of from about 1600 HV to about 2300 HV.

2. The surface treatment layer of claim 1 , wherein the surface treatment layer includes from about 1 wt. % to about 40 wt. % of the metal nitride compounds.

3. The surface treatment layer of claim 1 , wherein the surface treatment layer includes from about 6 wt. % to about 25 wt. % of the metal nitride compounds.

4. The surface treatment layer of claim 1 , wherein the thickness of the surface treatment layer is from about 2 μm to about 10 μm and the hardness of the surface treatment layer is from about 1800 HV to about 2200 HV.

5. The surface treatment layer of claim 1 , the disordered metal oxide lattice having a mean average grain size that is less than 100 nm.

6. A coated metal component comprising a titanium-containing substrate having a surface treatment layer therein, the surface treatment layer including a disordered metal oxide lattice having metal nitride compounds doped in the disordered metal oxide lattice, wherein the surface treatment layer has a thickness of from about 1 μm to about 15 μm and a hardness of from about 1600 HV to about 2300 HV.

7. The coated metal component of claim 6 , wherein the titanium-containing substrate includes at least 40 wt. % titanium, prior to having the surface treatment layer therein.

8. The coated metal component of claim 6 , wherein the titanium-containing substrate includes at least 70 wt. % titanium, prior to having the surface treatment layer therein.

9. The coated metal component of claim 6 , wherein the surface treatment layer includes from about 1 wt. % to about 40 wt. % of the metal nitride compounds.

10. The coated metal component of claim 6 , wherein the surface treatment layer includes from about 6 wt. % to about 25 wt. % of the metal nitride compounds.

11. The coated metal component of claim 6 , wherein the thickness of the surface treatment layer is from about 2 μm to about 10 μm and the hardness of the surface treatment layer is from about 1800 HV to about 2200 HV.

12. The coated metal component of claim 6 , the disordered metal oxide lattice having a mean average grain size that is less than 100 nm.

13. The coated metal component of claim 6 , wherein the titanium-containing substrate is selected from the group consisting of a slide in a bolt carrier, a knee replacement part, a hip replacement part, a gear, a crankshaft, a knife, and shears.

Assignees

• Strahin Brandon
• Univ Akron

Inventors

• Strahin Brandon

Classifications

• C23C30/005 Primary

  on hard metal substrates · CPC title

• B32B15/04

  comprising metal as the main or only constituent of a layer, {which is} next to another layer of {the same or of} a {different material (next to a bituminous or tarry layer B32B11/08; next to a water-setting substance layer B32B13/06; next to a glass layer B32B17/061; next to a cellulosic plastic layer B32B23/042)} · CPC title

• C22C14/00 Primary

  Alloys based on titanium · CPC title

• C23C8/10

  Oxidising · CPC title

• C23C8/24

  Nitriding · CPC title