Porous Copper Body Oxidation-Reduction Layer for Conductivity
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Solution Overview
Problem
Existing methods for manufacturing porous copper bodies and composite parts face challenges in achieving sufficient thermal and electrical conductivity due to insufficient metal bonding of copper raw materials, particularly when sintering is performed in inert or reduction atmospheres.
Innovation Solution
A porous copper body with a three-dimensional network structure and an oxidation-reduction layer is created, where the oxygen concentration is set to 0.025 mass % or less, enhancing specific surface area and conductivity, and a method involving preliminary reduction treatment, oxidation, and reduction steps ensures strong bonding of copper fibers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If sintering is performed in an inert gas atmosphere or a reduction atmosphere, then the porous copper body can be formed, but the metal bond of copper is insufficient and thermal conductivity and electrical conductivity are insufficient
Solution Approach 1:
The patent applies preliminary action by performing an oxidation treatment before the final reduction sintering. The oxidation step creates oxide layers on the copper particle surfaces that facilitate bonding, and subsequent reduction removes these oxides while maintaining strong metal bonds. This preliminary oxidation step is crucial for achieving sufficient thermal and electrical conductivity that would not be attainable through reduction atmosphere sintering alone.
Solution Approach 2:
The patent employs parameter changes by controlling the oxidation-reduction atmosphere conditions and temperature parameters during processing. By adjusting the oxidation atmosphere composition, temperature, and duration, followed by controlled reduction parameters, the patent optimizes the metal bonding quality and conductivity while maintaining the porous structure. This parameter optimization resolves the contradiction between ease of manufacture and bonding quality.
2Area of stationary object
If the specific surface area is increased through oxidation-reduction treatment, then heat exchange efficiency is improved, but the oxygen concentration must be precisely controlled to maintain conductivity
Solution Approach 1:
The patent applies parameter changes by precisely controlling the oxidation-reduction treatment parameters including atmosphere composition, temperature, and duration. These parameter adjustments enable the formation of an oxidation-reduction layer that increases specific surface area while maintaining oxygen concentration at 0.025 mass% or less, thus achieving both improved heat exchange efficiency and maintained conductivity through optimized processing parameters.
Solution Approach 2:
The patent employs continuity of useful action through a continuous oxidation-reduction treatment process. The oxidation and reduction steps are performed in sequence without interruption, ensuring that the surface area enhancement from oxidation is immediately followed by reduction that removes excess oxygen. This continuous process maintains oxygen concentration within the required threshold while maximizing specific surface area for heat exchange.
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 approach results in porous copper bodies and composite parts with significantly improved thermal and electrical conductivity, maintaining high porosity and dimensional accuracy, effectively addressing the conductivity limitations of previous methods.
Implementation Method 1
an oxidation-reduction layer formed by an oxidation-reduction treatment is provided on a surface of the skeleton
Implementation Method 2
sintering is performed in an inert gas atmosphere or a reduction atmosphere
Data Source
AI summary
A porous copper body including a skeleton having a three-dimensional network structure is provided. An oxidation-reduction layer formed by an oxidation-reduction treatment is provided on a surface of the skeleton, and the oxygen concentration of the entirety of the skeleton is set to be 0.025 mass % or less.