Metallic sliding material

• US 5,879,816 A
• Filed: 11/27/1996
• Issued: 03/09/1999
• Est. Priority Date: 11/30/1995
• Status: Expired due to Term

• Current Assignee: Nihon Parkerizing Company Limited, Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Nihon Parkerizing Company Limited, Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Michioka, Hirofumi, Mori, Kazuhiko, Koyama, Takashi, Fuwa, Yoshio, Kawaguchi, Jun
• Primary Examiner(s): Griffin, Steven P.
• Application Number:
  US08/758,251
• Time in Patent Office: 832 Days
• Field of Search: 428/621, 428/628, 428/632, 428/633, 428/650, 428/651, 428/657, 428/472, 428/472.3, 428/689, 428/697, 384/625, 384/907, 384/913
• US Class Current: 428/621
• CPC Class Codes: C23C 22/40 containing molybdates, tungstates or vanadates
• CPC Class Codes: C23C 22/42 containing also phosphates
• CPC Class Codes: C23C 22/43 containing also hexavalent chromium compounds
• CPC Class Codes: C25D 7/10 Bearings
• CPC Class Codes: F05C 2201/021 Aluminium
• CPC Class Codes: F05C 2203/04 Phosphor
• CPC Class Codes: F16C 2204/20 Alloys based on aluminium
• CPC Class Codes: F16C 2206/80 Cermets, i.e. composites of ceramics and metal in general C22C29/00
• CPC Class Codes: F16C 33/12 Structural composition; Use of special materials or surface treatments, e.g. for rust-proofing
• CPC Class Codes: Y10S 384/913 Metallic compounds
• CPC Class Codes: Y10T 428/12535 with additional, spatially distinct nonmetal component
• CPC Class Codes: Y10T 428/12583 Component contains compound of adjacent metal
• CPC Class Codes: Y10T 428/12611 Oxide-containing component
• CPC Class Codes: Y10T 428/12743 Next to refractory [Group IVB, VB, or VIB] metal-base component

Abstract

A metallic sliding material including at least a support member with a sliding surface and an inorganic compound coating layer formed on the sliding surface is disclosed. The sliding surface is formed from an aluminum alloy or a reinforcing material-containing aluminum alloy. The inorganic compound coating layer is formed from at least one aluminum compound, and at least one phosphorus compound, and at least one member selected from the group of molybdenum compounds, tungsten compounds, and chromium compounds. These compounds are present in such concentrations that molybdenum, tungsten, and chromium collectively constitute 2 to 48% by weight of the inorganic compound coating layer, aluminum constitutes 1 to 25% by weight of the inorganic compound coating layer, phosphorus constitutes 1 to 25% by weight of the inorganic compound coating layer, and the balance of the inorganic compound coating layer is oxygen and impurities.

Claims

1. A metallic sliding material comprising:

a support member having a sliding surface formed from an aluminum alloy or a reinforcing material-containing aluminum alloy; and

an inorganic compound coating layer formed on the sliding surface and having a thickness of 0.1 to 20 μ

m, the inorganic compound coating layer consisting essentially of at least one member selected from the group consisting of molybdenum compounds, tungsten compounds, and chromium compounds, at least one aluminum compound, at least one phosphorus compound, and oxygen present in such concentrations that molybdenum, tungsten, and chromium collectively constitute 2 to 48% by weight of the inorganic compound coating layer, aluminum constitutes 1 to 25% by weight of the inorganic compound coating layer, and phosphorus constitutes 1 to 25% by weight of the inorganic compound coating layer.

2. A metallic sliding material according to claim 1, wherein the inorganic compound coating layer includes at least one molybdenum compound.

3. A metallic sliding material according to claim 1, wherein the inorganic compound coating layer includes at least one tungsten compound.

4. A metallic sliding material according to claim 1, wherein the inorganic compound coating layer includes at least one chromium compound.

5. A metallic sliding member-contacting metallic member composite article, comprising:

a metallic sliding member made from the metallic sliding material as claimed in claim 1; and

a contacting member contacting the sliding surface of the metallic sliding member, the contacting member being made from at least one material selected from the group consisting of aluminum alloys, reinforcing material-containing aluminum alloys, and steel materials nitriding-treated or plated with a metal,

wherein the metallic sliding member and contacting member are slidable relative to each other.

6. A metallic sliding member-contacting metallic member composite article according to claim 5, wherein the metallic sliding member is a member selected from the group consisting of groove and skirt portions for a piston, a cylinder bore, a valve lifter, a valve spool for automatic transmission oil pressure control, a piston for brake master cylinder and a slide bearing, and further wherein the contacting member is a member selected from the group consisting of a piston ring, a cylinder bore, a cylinder head, a valve body and a shaft operatively corresponding to the metallic sliding member.