Sliding member, and sliding member for internal combustion engine

Patent metadata

Field	Value
Publication number	US-10927893-B2
Application number	US-201816483006-A
Country	US
Kind code	B2
Filing date	Feb 2, 2018
Priority date	Feb 3, 2017
Publication date	Feb 23, 2021
Grant date	Feb 23, 2021

Abstract

A sliding member for an internal combustion engine includes the sliding member at a sliding part of the internal combustion engine.

First claim

The invention claimed is:

1. A sliding member, comprising:
a base substrate; and
a coating layer formed on the base substrate;
wherein the coating layer includes copper alloy portions derived from precipitation hardening copper alloy particles, the copper alloy portions are bonded to each other via interfaces between the copper alloy portions, and the coating layer includes hard particle portions derived from hard particles, the hard particle portions being harder than the copper alloy portions,
wherein an aspect ratio of the hard particle portions is not less than 1.3 in its median value,
wherein the copper alloy portions contain nickel and silicon as additive elements, and the copper alloy portions contain 2 to 5 percent by mass of nickel.

2. The sliding member according to claim 1 , wherein at least one of the copper alloy portions contains at least one precipitation phase including nickel silicide inside the copper alloy portions and/or in an interface of the copper alloy portions.

3. The sliding member according to claim 1 , wherein at least one of the base substrate and the coating layer comprises at least one plastically deformed portion.

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

5. The sliding member according to claim 1 , comprising at least one intermediate layer including at least one of a diffusion layer or an intermetallic compound layer, the at least one intermediate layer being formed at least in a part of a gap between the base substrate and the coating layer.

6. The sliding member according to claim 1 , wherein the hard particle portions comprise at least one type of hard particles selected from the group consisting of: iron-based alloy particles, cobalt-based alloy particles, chromium-based alloy particles, nickel-based alloy particles, molybdenum-based alloy particles, or ceramic particles.

7. The sliding member according to claim 1 , wherein the copper alloy portions contain 3 to 5 percent by mass of nickel.

8. An internal combustion engine, the internal combustion engine comprising a sliding member at a sliding part of the internal combustion engine,
the sliding member comprising:
a base substrate; and
a coating layer formed on the base substrate;

wherein the coating layer includes copper alloy portions derived from precipitation hardening copper alloy particles, the copper alloy portions are bonded to each other via interfaces between the copper alloy portions, and the coating layer includes hard particle portions derived from hard particles, the hard particle portions being harder than the copper alloy portions,
wherein an aspect ratio of the hard particle portions is not less than 1.3 in its median value,
wherein the copper alloy portions contain nickel and silicon as additive elements, and the copper alloy portions contain 2 to 5 percent by mass of nickel.

Assignees

• Nissan Motor
• Fukuda Metal Foil & Powder Co Ltd

Inventors

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

Classifications

• C22C1/04

  by powder metallurgy (C22C1/08 takes precedence) · CPC title

• B22F7/04

  with one or more layers not made from powder, e.g. made from solid metal · CPC title

• C23C24/04

  Impact or kinetic deposition of particles · CPC title

• F01L3/04 Primary

  Coated valve members or valve-seats · CPC title

• B22F7/08

  with one or more parts not made from powder {(B22F7/062 takes precedence)} · CPC title