# US 11,078,574 B2 · Multilayered aluminiferous protective coating and component

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 11,078,574 B2
- Document ID: US11078574B2
- Status: Granted
- Kind: B2
- Application number: 16/347,947
- Filed: 2017-11-07
- Published: 2019-11-21
- Granted: 2021-08-03
- Earliest claimed: 2016-11-14
- Assignees: Siemens Energy Global GmbH & Co. KG
- Applicants: Siemens Aktiengesellschaft
- Inventors: Arturo Flores Renteria; Simone Friedle; Torsten Neddemeyer
- Web page: https://patentgrep.com/patent/US11078574B2

## CPC

- C23C 28/42: {characterized by the composition of the alternating layers}
- B32B 15/043: {of metal (B32B15/01 takes precedence)}
- B32B 15/18: comprising iron or steel {(B32B15/011, B32B15/012 and B32B15/013 take precedence)}
- B32B 15/20: comprising aluminium or copper {(B32B15/016 and B32B15/017 take precedence)}
- C23C 14/0641: {Nitrides (C23C14/0617 takes precedence)}
- C23C 28/321: {with at least one metal alloy layer}
- C23C 28/34: {including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates}
- F01D 5/288: {Protective coatings for blades}
- F05D 2300/121: Aluminium
- F05D 2300/134: Zirconium
- F05D 2300/611: Coating
- C23C: COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL (making metal-coated products by extrusion B21C23/22; covering with metal by connecting pre-existing layers to articles, see the relevant places, e.g. B21D39/00, B23K; metallising of glass C03C; metallising mortars, concrete, artificial stone, ceramics or natural stone C04B41/00; enamelling of, or applying a vitreous layer to, metals C23D; treating metal surfaces or coating of metals by electrolysis or electrophoresis C25D; single-crystal film growth C30B; by metallising textiles D06M11/83; decorating textiles by locally metallising D06Q1/04)
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D)
- F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS

## Abstract

The use of especially an aluminum alloy on a metal substrate in a PVD-AlTiN coating results in good corrosion and erosion protection.

## Claims

### Claim 1

A protective coating system, which has a bottom aluminiferous or zirconiferous sub-layer on a substrate, wherein the sublayer is at least one of directly on and in the substrate, wherein the sub-layer comprises only aluminum or an aluminum-zirconium alloy or only zircon and includes an outer multilayered-cover layer consisting of alternating TiAlN and AlTiN layers, which has been applied by PVD.

### Claim 2 (depends on 1)

The protective coating system as claimed in claim 1, wherein the sub-layer comprises a diffusion layer.

### Claim 3 (depends on 1)

The protective coating system as claimed in claim 1, wherein the substrate is steel.

### Claim 4

A compressor blade component, comprising:
a substrate; and
a protective coating system, wherein the protective coating system comprises a bottom sub-layer wherein the bottom sub-layer is an aluminiferous or zirconiferous sub-layer, wherein the bottom sub-layer comprises only aluminum or an aluminum-zirconium alloy or only zircon, and wherein the protective coating system comprises an outer multilayered cover layer consisting of alternating TiAlN and AlTiN layers, which has been applied by PVD.

### Claim 5 (depends on 4)

The compressor blade component as claimed in claim 4, in which the sub-layer is at least one of arranged directly on and in the substrate.

### Claim 6 (depends on 4)

The compressor blade component as claimed in claim 4, in which the sub-layer comprises a diffusion layer.

### Claim 7 (depends on 4)

The compressor blade component as claimed in claim 4, wherein the substrate is steel.

### Claim 8

A method comprising:
providing a substrate, wherein the substrate is a compressor blade;
applying a sub-layer to the substrate, wherein the sub-layer is an aluminiferous or zirconiferous sub-layer and comprises only aluminum or an aluminum-zirconium alloy or only zircon; and
applying an outer multilayered cover layer consisting of alternating TiAlN and AlTiN layers on top of the sub-layer, wherein the outer multilayered cover layer is applied by PVD.