PVD barrier coating for superalloy substrates

Patent metadata

Field	Value
Publication number	US-11655544-B2
Application number	US-201917284635-A
Country	US
Kind code	B2
Filing date	Oct 16, 2019
Priority date	Oct 17, 2018
Publication date	May 23, 2023
Grant date	May 23, 2023

Abstract

A layered stack that can be used as an oxidation and chemical barrier with superalloy substrates, including Ni, Ni—Co, Co, and Ni-aluminide based substrates, and methods of preparing the layered stack. The layer system can be applied to a substrate in a single physical vapor deposition process with no interruption of vacuum conditions.

First claim

The invention claimed is:

1. A multilayered structure comprising:
a. a metallic substrate; and
b. a multilayer coating disposed on the metallic substrate comprising:
i. a discrete first layer disposed on the metallic substrate, the discrete first layer comprising a Ni-, Co-, Ni—Co-, or Ni-aluminide based material;
ii. a discrete second layer disposed on the discrete first layer, the discrete second layer comprising Al, Cr, O, and further comprising a Ni-, Co-, Ni—Co, or Ni-aluminide based material; and
iii. a discrete third layer disposed on the discrete second layer, the discrete third layer comprising Al, Cr, and O.

2. The multilayered structure according to claim 1 , wherein at least the metallic substrate is a Ni-based superalloy comprising 38 to 76 wt. % Ni, up to 27 wt. % Cr, and up to 20 wt. % Co or wherein the metallic substrate is a Co-based superalloy comprising 35 to 65 wt. % Co, 19 to 30 wt. % Cr, and up to 35 wt. % Ni.

3. The multilayered structure according to claim 1 , wherein at least the discrete first layer comprises 38 to 76 wt. % Ni, up to 27 wt. % Cr, and up to 20 wt. % Co or wherein the discrete first layer comprises 35 to 65 wt. % Co, 19 to 30 wt. % Cr, and up to 35 wt. % Ni.

4. The multilayered structure according to claim 1 , wherein the metallic substrate is a Ni—Co-based superalloy comprising 40 to 80 wt. % Ni, 9 to 35 wt. % Co, and 10 to 20 wt. % Cr.

5. The multilayered structure according to claim 1 , wherein the discrete first layer comprises 40 to 80 wt. % Ni, 9 to 35 wt. % Co, and 10 to 20 wt. % Cr.

6. The multilayered structure according to claim 1 , wherein the metallic substrate is a Ni-aluminide comprising NiAl, NiAl 3 , or Ni 3 Al with a deviation from nominal composition of ±10 wt. %.

7. The multilayered structure according to claim 1 , wherein the metallic substrate is a single-crystalline Ni-based superalloy comprising 38 to 76 wt. % Ni, up to 27 wt. % Cr, and up to 20 wt. % Co.

8. The multilayered structure according to claim 1 , the discrete first layer comprising a chemical composition that is the same as a chemical composition of the metallic substrate.

Assignees

• Oerlikon Surface Solutions Ag
• Oerlikon Surface Solutions Ag Pfaeffikon

Inventors

• Ramm Jürgen
• Widrig Beno
• Gindrat Malko

Classifications

• C23C28/36

  including layers graded in composition or physical properties · CPC title

• F05D2300/182

  Metal-aluminide intermetallic compounds · CPC title

• C23C14/325

  Electric arc evaporation · CPC title

• C23C28/321

  with at least one metal alloy layer · CPC title

• C23C14/0021

  Reactive sputtering or evaporation · CPC title