Sliding component coated with metal-comprising carbon layer for improving wear and friction behavior by tribological applications under lubricated conditions

A sliding component and component technology, applied in the direction of metal material coating process, coating, engine components, etc., can solve problems such as coating denaturation

Active Publication Date: 2014-03-12
OERLIKON SURFACE SOLUTIONS AG PFAFFIKON
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Additionally, unwanted chemical reactions can occur between the additive complex molecules and the a-C:H or a-C:H:Me coating and lead to denaturation of the coating itself

Method used

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  • Sliding component coated with metal-comprising carbon layer for improving wear and friction behavior by tribological applications under lubricated conditions
  • Sliding component coated with metal-comprising carbon layer for improving wear and friction behavior by tribological applications under lubricated conditions
  • Sliding component coated with metal-comprising carbon layer for improving wear and friction behavior by tribological applications under lubricated conditions

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Embodiment Construction

[0014] In order to overcome the drawbacks of DLC coatings interacting with lubricants containing Mo-containing and / or Zn-containing additives, the inventors aimed to design a new metal-doped modified DLC coating that can impart The chemical affinity of the additives thus provides better friction and wear properties compared to the prior art.

[0015] As mentioned earlier, a-C:H:Me coatings with an atomic ratio of Me-C not greater than 20% are known from the prior art for the coating of sliding components to improve wear and friction properties, however, these coatings (similar to metal-free a-C:H coatings) are incompatible with lubricants containing Mo-containing and / or Zn-containing additives.

[0016] The inventors have unexpectedly found that metal-doped DLC coatings having an atomic percentage of Me:C greater than or equal to 30% and less than or equal to 60% show a positive interaction with lubricants containing Mo-containing and / or Zn-containing additives effect and thu...

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Abstract

The present invention relates to a coating for sliding parts that allows using diamond like carbon (DLC) or DLC-comprising coatings in combination with Molybdenum- and/or Zinc-comprising lubricants in such a manner that enhanced reduction of wear and friction in comparison to the state of the art is attained. The coating system according to the present invention comprises at least a metal-comprising carbon layer of the type Me-C/a)-C:X, whose element composition can be expressed as (MeaC1-a)1-bXb with 0.3 <= a <=0.6 and 0<= b <=0.3, where Me is a metal or a combination of different metals and X is an element different from Me and different from C or X is a mixture of elements different from Me and which doesn't contain C. Me can be preferably Chromium (Cr) or Molybdenum (Mo) and X can be preferably hydrogen (H) or a mixture of silicon and hydrogen (Si + H).

Description

technical field [0001] The present invention relates to coatings for sliding parts which allow the use of diamond-like carbon (DLC) or DLC-containing coatings in combination with molybdenum-containing and / or Combination of zinc lubricants. The coating system of the present invention comprises at least a metal-containing carbon layer of type Me-C / a-C:X, whose elemental composition can be expressed as (Me a C 1-a ) 1-b x b , where 0.3≤a≤0.6, and 0<b≤0.3, where Me is a metal or a combination of different metals, X is an element different from Me and different from C, or X is an element different from Me and does not contain C mixture. Me may preferably be chromium (Cr) or molybdenum (Mo), and X may preferably be hydrogen (H) or a mixture of silicon and hydrogen (Si+H). Background technique [0002] In the automotive industry, the application of DLC coatings has become widely accepted as a standard solution to eliminate wear problems in critical designs subject to very ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/06
CPCC23C14/025C23C14/505C23C14/352C23C14/067F05C2203/086C23C14/0688F05C2203/0808C23C14/14C23C14/0605C23C14/021F05C2201/0496C23C14/0682F04B1/2078F04B27/109F05C2251/14F04B1/146C23C14/0664C23C14/027F04B27/086C23C14/06C23C14/32C23C14/34
Inventor J·贝克M·格里施克A·吉斯
Owner OERLIKON SURFACE SOLUTIONS AG PFAFFIKON
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