Thin Metal-SiC Heat Dissipation Member for Automotive Mounts
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Solution Overview
Problem
Existing heat dissipation members for railroad vehicles lack thinness and effective heat dissipation capabilities for automotive applications.
Innovation Solution
A heat dissipation member made from a thin metal-silicon carbide composite with low thermal expansion and high thermal conductivity, featuring a thickness of less than 4 mm, optimized surface roughness, and a Ni plating layer for improved bonding and heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If conventional metal heat dissipation members are used for railroad vehicles, then heat dissipation function is provided, but thickness cannot be reduced below certain limits
Solution Approach 1:
The patent employs metal-silicon carbide composite material that combines the high thermal conductivity of metals with the low thermal expansion and high strength of silicon carbide. This composite structure enables achieving superior heat dissipation performance in a thinner configuration compared to conventional solid metal heat dissipation members, directly resolving the contradiction between reducing thickness and maintaining heat dissipation reliability.
Solution Approach 2:
The patent optimizes key parameters including thickness (equal to or less than 4 mm), surface roughness (Ra between 0.1-2.0 μm), and material composition ratios. By precisely controlling these parameters, the heat dissipation member achieves both reduced thickness and enhanced heat dissipation efficiency, transforming the trade-off relationship into a synergistic design where parameter optimization simultaneously improves both dimensions.
2Volume of moving object
If heat dissipation member is thinned for automotive applications, then compactness is improved, but heat dissipation capability may deteriorate
Solution Approach 1:
The metal-silicon carbide composite provides inherently superior thermal conductivity and heat capacity per unit volume compared to conventional metals. This material property enables the heat dissipation member to maintain excellent heat dissipation capability while occupying significantly reduced volume, directly addressing the contradiction between compactness and heat dissipation performance for automotive applications.
Solution Approach 2:
The patent optimizes the surface roughness (Ra: 0.1-2.0 μm) and internal structure distribution of the composite material to enhance local heat transfer efficiency. By controlling the quality and distribution of thermal pathways within the thinned structure, the member achieves high heat dissipation capability despite reduced overall volume, resolving the contradiction between compactness and thermal performance.
3Ease of manufacture
If conventional materials are used, then manufacturing is straightforward, but thermal expansion causes warpage and bonding issues
Solution Approach 1:
The metal-silicon carbide composite inherently possesses low thermal expansion characteristics due to the ceramic silicon carbide component. This material property stabilizes the dimensional composition during thermal cycling, preventing warpage and bonding failures without complicating the manufacturing process. The composite can be produced using established metal matrix composite manufacturing techniques, maintaining ease of manufacture while dramatically improving thermal expansion stability.
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 provides a compact, high-performance heat dissipation member with reduced thermal resistance and weight, suitable for automotive mounts and electronic components, while minimizing warpage and thermal expansion issues.
Implementation Method 1
a heat receiving member, in which the plurality of power semiconductor elements are attached to one surface side of the heat receiving member
Implementation Method 2
a metal-silicon carbide composite having low thermal expansion and a high thermal conductivity
Data Source
AI summary
Provided is a heat dissipation member according to the present invention including a flat metal-silicon carbide composite containing aluminum, in which a thickness of the heat dissipation member is equal to or less than 4 mm, and the heat dissipation member is used as a heat dissipation member for automobile mount.