Sliding Member with Filled Concavities for Abrasion Resistance
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Solution Overview
Problem
Existing sliding members face challenges in achieving both satisfactory abrasion resistance and slidability due to poor adhesion of DLC films, making it difficult to enhance frictional properties without compromising durability.
Innovation Solution
A sliding member design featuring a base with regularly arranged concavities filled with a material differing in frictional coefficient and/or hardness, optionally including an interlayer with high affinity, to create a surface with both high abrasion resistance and low friction, manufactured through processes like ion bombardment and vapor deposition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a DLC film is coated on the sliding surface to improve abrasion resistance, then hardness increases, but adhesion to substrate deteriorates
Solution Approach 1:
The invention applies local quality by creating a multi-layer structure where each layer has different material properties optimized for its specific function. The base layer provides adhesion to the substrate, the intermediate layer provides a transition zone, and the top DLC layer provides hardness and wear resistance. This resolves the contradiction by allowing the surface to be hard while maintaining good adhesion through the graded structure.
Solution Approach 2:
The invention uses composite materials by combining DLC film with metal or ceramic layers to create a multi-layer coating system. This composite structure allows the DLC layer to provide hardness and wear resistance while the metal or ceramic layers provide adhesion and structural support, resolving the contradiction between surface hardness and substrate adhesion.
2Duration of action of stationary object
If DLC film is coated to improve abrasion resistance, then durability increases, but slidability deteriorates
Solution Approach 1:
The invention applies local quality by creating a multi-layer structure where each layer has different material properties optimized for its specific function. The base layer provides adhesion to the substrate, the intermediate layer provides a transition zone, and the top DLC layer provides hardness and wear resistance. This resolves the contradiction by allowing the surface to be hard while maintaining good adhesion through the graded structure.
Solution Approach 2:
The invention uses composite materials by combining DLC film with metal or ceramic layers to create a multi-layer coating system. This composite structure allows the DLC layer to provide hardness and wear resistance while the metal or ceramic layers provide adhesion and structural support, resolving the contradiction between surface hardness and substrate adhesion.
3Reliability
If adhesion is increased to improve durability, then reliability increases, but slidability deteriorates
Solution Approach 1:
The invention applies local quality by creating a multi-layer structure where each layer has different material properties optimized for its specific function. The base layer provides adhesion to the substrate, the intermediate layer provides a transition zone, and the top DLC layer provides hardness and wear resistance. This resolves the contradiction by allowing the surface to be hard while maintaining good adhesion through the graded structure.
Solution Approach 2:
The invention uses composite materials by combining DLC film with metal or ceramic layers to create a multi-layer coating system. This composite structure allows the DLC layer to provide hardness and wear resistance while the metal or ceramic layers provide adhesion and structural support, resolving the contradiction between surface hardness and substrate adhesion.
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 solution enables sliding members with improved abrasion resistance and slidability, suitable for severe environments with or without lubricants, by balancing the properties of the base and filling materials.
Implementation Method 1
depositing a film of the second material on the etched base through vapor deposition to form a filling part
Implementation Method 2
etching the partially masked base to give an etched base
Data Source
AI summary
Provided is a sliding member having slidability and abrasion resistance both at satisfactory levels. This sliding member has a sliding surface including a base and a filling part. The base includes a first material and bears regularly arranged concavities. The filling part includes a second material and is arranged in the sliding surface to fill the concavities. The first material includes one selected from the group consisting of a metallic material, a ceramic material, and a carbonaceous material. The second material includes at least one selected from the group consisting of a metallic material, a ceramic material, and a carbonaceous material. The first and second materials differ from each other in at least one of frictional coefficient and hardness. The base and the filling part are substantially flush with each other in the sliding surface.