Solid-Lubricant Sliding Layers for Low-Wear Electrical Contacts
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Solution Overview
Problem
Existing electrical contact surfaces face issues with high electrical contact resistance and wear due to the use of solid lubricants, which are complex and costly to produce, and lack flexibility in deposition methods.
Innovation Solution
A method for producing electrical contacts by applying a sliding layer of solid lubricant, such as WS2, onto metallic or metallized surfaces using mechanical rubbing, sputtering, or spraying, without the need for binders, to enhance tribological properties and maintain stable contact resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electroplating dispersion deposition is used to incorporate graphite, then solid lubricant is applied, but flexibility is limited due to electrolyte composition constraints
Solution Approach 1:
The patent replaces the electrochemical deposition process with mechanical or physical methods such as ball milling, spraying, or vacuum deposition. This substitution allows for greater flexibility in selecting lubricant materials and controlling coating properties without being constrained by electrolyte chemistry.
2Reliability
If multiple coating layers are applied to ensure coverage, then tribological protection is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent incorporates solid lubricant particles into the coating formulation before application, so that lubrication functionality is built-in from the start rather than requiring subsequent treatment steps. This preliminary incorporation simplifies the overall manufacturing process while ensuring adequate coverage and protection.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method improves wear resistance and reduces friction coefficient, allowing the electrical contacts to withstand higher mating cycles with stable contact resistance, and can operate at higher temperatures and under vacuum conditions.
Implementation Method 1
applying a sliding layer to the metallic and/or metallized surface of the substrate (2), wherein the sliding layer (6) has a layer thickness of 0.01 μm to 4 μm, wherein the sliding layer (6) is applied by mechanically rubbing in, polishing and/or buffing a solid lubricant
Implementation Method 2
wherein the sliding layer (6) is applied by sputtering a solid lubricant
Implementation Method 3
wherein the sliding layer (6) is applied by spraying a solid lubricant using a carrier gas
Implementation Method 4
The sliding layer (6) consists of a solid lubricant... improves wear resistance and reduces friction coefficient
Implementation Method 5
improves wear resistance and reduces friction coefficient, allowing the electrical contacts to withstand higher mating cycles
Data Source
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AI summary
The present application relates to a method for producing an electrical contact, in particular an electrical plug contact, comprising the steps a) providing a substrate, wherein the substrate has a metallic and/or metallized surface, and b) applying a sliding layer to the metallic and/or metallized surface of the substrate, wherein the sliding layer is applied by mechanical rubbing, polishing and/or buffing of a solid lubricant; or wherein the sliding layer is applied by sputtering of a solid lubricant; or wherein the sliding layer is applied by spraying of a solid lubricant; or wherein the sliding layer is applied by applying a solid lubricant using a drum washer.