Sliding member and member for internal combustion engine

Patent metadata

Field	Value
Publication number	US-12135059-B2
Application number	US-201917262333-A
Country	US
Kind code	B2
Filing date	Jun 19, 2019
Priority date	Aug 2, 2018
Publication date	Nov 5, 2024
Grant date	Nov 5, 2024

Abstract

A sliding member of the present invention includes a base material and a coating layer that is formed on the base material. The coating layer includes a particle aggregate that contains precipitation hardened copper alloy particles. The precipitation hardened copper alloy particles contain cobalt (Co) and silicon (Si). The sliding member has high coating strength and superior wear resistance.

First claim

The invention claimed is:

1. A sliding member comprising:
a base material; and
a coating layer that is formed on the base material,
the coating layer including a particle aggregate that contains precipitation hardened copper alloy particles formed by cold spraying unmelted solid particles in a supersaturated solid solution state on the base material, and
the precipitation hardened copper alloy particles containing cobalt (Co) and silicon (Si).

2. The sliding member according to claim 1 , wherein an average grain size of crystal grains in the precipitation hardened copper alloy particles is smaller than 1 μm.

3. The sliding member according to claim 1 , wherein a content of cobalt of the precipitation hardened copper alloy particles is 0.8 mass % to 4 mass %.

4. The sliding member according to claim 1 , wherein the precipitation hardened copper alloy particles include a precipitated phase containing cobalt silicide (Co 2 Si).

5. The sliding member according to claim 1 , wherein the precipitation hardened copper alloy particles contain at least one of nickel (Ni), iron (Fe), and manganese (Mn), and a total content together with cobalt is 2 mass % to 4 mass %.

6. The sliding member according to claim 1 , wherein at least one of the base material and the coating layer includes a plastically deformed part.

7. The sliding member according to claim 1 , including at least one of an amorphous substance and a nanocrystal at an interface between the particles that form the coating layer.

8. The sliding member according to claim 1 , wherein a porosity in a cross section of the coating layer is 3 area % or less.

9. The sliding member according to claim 1 , comprising an intermediate layer at least at a part between the base material and the coating layer, the intermediate layer containing at least one of a diffusion layer and an intermetallic compound layer.

10. A member for an internal combustion engine, comprising a sliding part, wherein the sliding part is provided with the sliding member according to claim 1 .

Assignees

• Nissan Motor
• Fukuda Metal Foil & Powder Co Ltd

Inventors

• Izawa Yoshinori
• Arai Junichi
• Otobe Katsunori
• Nishimura Shinichi

Classifications

• C23C30/00 Primary

  Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process (C23C26/00, C23C28/00 take precedence) · CPC title

• F02F3/10

  having surface coverings (F02F3/02 takes precedence) · CPC title

• C23C24/04

  Impact or kinetic deposition of particles · CPC title

• C22C9/06

  with nickel or cobalt as the next major constituent · CPC title

• F01L1/047

  Camshafts · CPC title