Sliding member, and sliding member of internal combustion engine

Patent metadata

Field	Value
Publication number	US-2020011216-A1
Application number	US-201816483354-A
Country	US
Kind code	A1
Filing date	Feb 2, 2018
Priority date	Feb 3, 2017
Publication date	Jan 9, 2020
Grant date	—

Abstract

A sliding member includes a base substrate and a coating layer formed on the base substrate. The coating layer includes an inorganic part derived from at least one type of inorganic particles selected from the group consisting of iron base alloy particles, cobalt base alloy particles, chromium base alloy particles, nickel base alloy particles, molybdenum base alloy particles, and ceramic particles, and a metal part derived from at least one type of metal particles selected from the group consisting of iron base alloy particles other than listed in the above group, copper particles, and copper alloy particles. The inorganic part is bonded to another inorganic part and/or the metal part via interfaces therebetween, and the metal part is bonded to another metal part and/or the inorganic part via interfaces therebetween. The sliding member includes an interface layer including at least one of a diffusion layer and an intermetallic compound layer on at least one part of an interface between the base substrate and the coating layer or interfaces between the inorganic part and the metal part, the inorganic parts, and the metal parts. The interface layer has a thickness of equal to or less than 2 μm.

First claim

1 - 8 . (canceled)

9 . A sliding member comprising a base substrate and a coating layer formed upon the base substrate,
wherein the coating layer comprises an inorganic portion derived from at least one type of inorganic particles selected from the group consisting of iron base alloy particles, cobalt base alloy particles, chromium base alloy particles, nickel base alloy particles, molybdenum base alloy particles, and ceramic particles, and a metal portion derived from at least one type of metal particles selected from the group consisting of iron base alloy particles other than listed in the above group, copper particles, and copper alloy particles, with the inorganic portion and the metal portion being bonded together via. an interface; the sliding member includes an interface layer including at least one of a diffusion layer and an intermetallic compound layer on both of an interface between the base substrate and the coating layer and an interface between the inorganic portion and the metal portion; and the thickness of the interface layer is 2 m or less.

10 . The sliding member according to claim 9 , wherein the Vickers hardness of the inorganic portion is 500 HV or greater and 1500 HV or less.

11 . The sliding member according to claim 9 , wherein the Vickers hardness of the metal portion is less than 500 HV.

12 . The sliding member according to claim 9 , wherein the iron base alloy particles other than listed in the above group include austenitic stainless steel particles.

13 . The sliding member according to claim 9 , wherein the Young's modulus of the inorganic portion is 100 GPa or greater.

14 . The sliding member according to claim 9 , wherein at least one of the base substrate and the coating layer includes a plastically deformed portion.

15 . A sliding member comprising a base substrate and a coating layer formed on the base substrate,
wherein the coating layer comprises a hard material portion derived from hard material particles whose Vickers hardness is 500 HV or greater and 1500 HV or less, and a soft material portion derived from soft material particles whose Vickers hardness is less than 500 HV, with the hard material portion and the soft material portion being bonded together via an interface; the sliding member includes an interface layer including at least one of a diffusion layer and an intermetallic compound layer on both of an interface between the base substrate and the coating layer and an interface between the hard material portion and the soft material portion; and the thickness of the interface layer is 2 μm or less.

16 . A sliding member of an internal combustion engine having a sliding member, comprising a sliding member upon a sliding region of the internal combustion engine, the sliding member comprising;
a base substrate and a coating layer formed upon the base substrate, wherein the coating layer comprises an inorganic portion derived from at least one type of inorganic particles selected from the group consisting of iron base alloy particles, cobalt base alloy particles, chromium base alloy particles, nickel base alloy particles, molybdenum base alloy particles, and ceramic particles, and a metal portion derived from at least one type of metal particles selected from the group consisting of iron base alloy particles other than listed in the above group, copper particles, and copper alloy particles, with the inorganic portion and the metal portion being bonded together via an interface; the sliding member includes an interface layer including at least one of a diffusion layer and an intermetallic compound layer on both of an interface between the base substrate and the coating layer and an interface between the inorganic portion and the metal portion; and the thickness of the interface layer is 2 μm or less.

17 . A sliding member of an internal combustion engine having a sliding member, comprising a sliding member upon a sliding region 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 comprises a hard material portion derived from hard material particles whose Vickers hardness is 500 HV or greater and 1500 HV or less, and a soft material portion derived from soft material particles whose Vickers hardness is less than 500 HV, with the hard material portion and the soft material portion being bonded together via an interface; the sliding member includes an interface layer including at least one of a diffusion layer and an intermetallic compound layer on both of an interface between the base substrate and the coating layer and an interface between the hard material portion and the soft material portion; and the thickness of the interface layer is 2 μm or less.

18 . The sliding member according claim 9 , wherein the coating layer comprises: the inorganic portion derived from the inorganic particles including cobalt base alloy particles and/or nickel base alloy particles, and the metal portion derived from either of austenitic stainless steel particles and copper particles, or metal particles including a precipitation hardening type copper alloy particles.

Assignees

• Nissan Motor

Inventors

• Izawa Yoshinori

Classifications

• F01L3/08

  Valves guides; Sealing of valve stem, e.g. sealing by lubricant · CPC title

• F01L3/04 Primary

  Coated valve members or valve-seats · CPC title

• C23C24/04 Primary

  Impact or kinetic deposition of particles · CPC title

• F01L3/02

  Selecting particular materials for valve-members or valve-seats; Valve-members or valve-seats composed of two or more materials · CPC title

• F01L2820/01

  Absolute values · CPC title