Composite coating, piston, engine and vehicle

Patent metadata

Field	Value
Publication number	US-12085039-B2
Application number	US-202218265763-A
Country	US
Kind code	B2
Filing date	Mar 30, 2022
Priority date	Mar 30, 2021
Publication date	Sep 10, 2024
Grant date	Sep 10, 2024

Abstract

Provided are a composite coating, a piston, an engine, and a vehicle. The composite coating comprises a metal bonding layer, a transition layer, a ceramic layer, and a sealing layer which are sequentially laminated, wherein the metal bonding layer is configured to be bonded with a piston basic body, the metal bonding layer is a rare earth metal modified bonding layer, and the transition layer is a rare earth metal modified zirconia layer.

First claim

The invention claimed is:

1. A composite coating for piston, wherein the composite coating comprises a metal bonding layer, a transition layer, a ceramic layer and a sealing layer which are sequentially laminated; wherein the metal bonding layer is configured to be bonded with a piston basic body, the metal bonding layer is a rare earth metal modified bonding layer, and the transition layer is a rare earth metal modified zirconia layer,
wherein the ceramic layer is selected from the group consisting of zirconia, yttria, yttria-stabilized zirconia and a combination thereof,
wherein the ceramic layer is configured to form a wave-like superposition structure in which ceramic particles are arranged in a curved and staggered manner rather than in a linear or non-interference arrangement.

2. The composite coating according to claim 1 , wherein the metal bonding layer is selected from the group consisting of a rare earth metal modified NiCoCrAlY layer, a rare earth metal modified NiCrAlY layer, a rare earth metal modified NiAlY layer and a combination thereof;
wherein, the rare earth metal is selected from the group consisting of Ce, Y, Re, Nd, La, Sm and a combination thereof.

3. The composite coating according to claim 2 , wherein, in the metal bonding layer, the addition amount of rare earth metal is 0.5%-1% by mass percentage.

4. The composite coating according to claim 3 , wherein, in the transition layer, the rare earth metal is selected from the group consisting of Ce, Y, Re, Nd, La, Sm and a combination thereof.

5. The composite coating according to claim 3 , wherein the ceramic layer is selected from the group consisting of zirconia, yttria, yttria-stabilized zirconia and a combination thereof.

6. The composite coating according to claim 2 , wherein the metal bonding layer has a thickness of 50-150 μm.

7. The composite coating according to claim 6 , wherein, in the transition layer, the rare earth metal is selected from the group consisting of Ce, Y, Re, Nd, La, Sm and a combination thereof.

8. The composite coating according to claim 6 , wherein the ceramic layer is selected from the group consisting of zirconia, yttria, yttria-stabilized zirconia and a combination thereof.

9. The composite coating according to claim 2 , wherein, in the transition layer, the rare earth metal is selected from the group consisting of Ce, Y, Re, Nd, La, Sm and a combination thereof.

10. The composite coating according to claim 2 , wherein the ceramic layer is selected from the group consisting of zirconia, yttria, yttria-stabilized zirconia and a combination thereof.

11. The composite coating according to claim 1 , wherein, in the transition layer, the rare earth metal is selected from the group consisting of Ce, Y, Re, Nd, La, Sm and a combination thereof.

12. The composite coating according to claim 11 , wherein, in the transition layer, the addition amount of rare earth metal is 0.5%-1% by mass percentage.

13. The composite coating according to claim 11 , wherein, the transition layer is formed by a raw material with a powder particle size of 10-100 μm.

14. The composite coating according to claim 11 , wherein the transition layer has a thickness of 100-200 μm.

15. The composite coating according to claim 1 , wherein the ceramic layer is an yttria-stabilized zirconia layer with a hollow structure.

16. The composite coating according to claim 1 , wherein, the ceramic layer has a thickness of 400-500 μm.

17. A piston, comprising a piston basic body and the composite coating according to claim 1 , wherein the composite coating is provided on an ablation surface of the piston basic body.

18. An engine comprising the piston according to claim 17 .

19. A vehicle, comprising the engine according to claim 18 .

Assignees

• Weichai Power Co Ltd

Inventors

• Ma Fei
• Wang Ninglu
• Guo Lingyan
• Wan Shanhong
• Huang Guolong
• Zang Qiangzhen

Classifications

• C23C4/02

  Pretreatment of the material to be coated, e.g. for coating on selected surface areas · CPC title

• C23C4/134

  Plasma spraying · CPC title

• C23C4/129

  Flame spraying · CPC title

• C23C4/11

  Oxides · CPC title

• C23C4/073 Primary

  containing MCrAl or MCrAlY alloys, where M is nickel, cobalt or iron, with or without non-metal elements · CPC title