Metal-Graphene Composite Using Direct CVD for Uniform Bonding

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Solution Overview

Problem

Existing metal-graphene composites do not achieve optimal mechanical properties due to inferior bonding and non-uniform thickness of the graphene layer when transferred onto a metal layer, leading to subpar performance as reinforcing materials.

Innovation Solution

A metal-graphene composite is formed by directly growing two or more graphene thin films on a metal layer using a chemical vapor deposition method, ensuring excellent bonding and uniform thickness, which enhances mechanical properties such as Young's modulus, hardness, and stiffness.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If the powder sintering method is used to create metal-graphene composite, then the composite can be applied as a high-strength thin film, but the graphene layer exhibits inferior bonding and non-uniform thickness

Engineering Contradiction:

Improvemechanical propertiesVSAvoidgraphene layer uniformity and bonding quality

Core Design Contradiction:

StrengthVSManufacturing precision

Solution Approach 1:

The patent replaces the mechanical powder sintering method with a chemical vapor deposition (CVD) process. Instead of physically mixing and sintering graphene powder with metal particles, the invention uses chemical reactions to grow graphene directly on the metal substrate, achieving atomic-level uniformity and strong chemical bonding without mechanical compression.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces a metal substrate as an intermediary platform for direct graphene growth. The metal layer serves as both the structural base and the catalytic substrate for CVD graphene formation, enabling controlled epitaxial growth that ensures uniform thickness and strong interfacial bonding between graphene and metal.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of manufacture

If graphene layer is transferred onto metal layer, then composite can be formed, but bonding is inferior and thickness is non-uniform

Engineering Contradiction:

Improvecomposite formationVSAvoidbonding quality and thickness uniformity

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The patent inverts the conventional approach by instead of transferring graphene onto metal, growing graphene directly on the metal substrate through CVD. This reverse methodology eliminates the transfer process entirely, achieving both ease of manufacture and high precision simultaneously through in-situ growth.

Inventive Principle:

Principle #13The other way round (Inversion)

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 direct growth method results in a composite with improved mechanical properties, including a Young's modulus of 100 GPa or more, hardness of 2 GPa or more, and stiffness of 2.0×10−6 N/m or more, making it suitable for various reinforcing applications.

Implementation Method 1

A metal-graphene composite is formed by directly growing two or more graphene thin films on a metal layer using a chemical vapor deposition method

Methodology Applied

Scientific EffectChemical vapor deposition: Chemical Vapour Deposition

Data Source

PatentUS12371816B2Metal-graphene composite

Publication Date: 2025.07.29 GRAPHENE SQUARE INC

AI summary

The present disclosure may provide a metal-graphene composite having excellent mechanical properties.