Solid-State Nano-Composite Metal Joining Through Interdiffusion
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Solution Overview
Problem
Conventional methods for producing nano-composite metal materials require heating to the melting point of the materials, leading to increased costs, labor, and complex processes due to handling molten metals.
Innovation Solution
A method involving interdiffusion between solid metal bodies and materials containing specific components with positive and negative heat of mixing, allowing for the production of nano-composite metal members without melting, reducing production costs and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If heating to the melting point or higher is performed to produce nano-composite metal material, then the materials can be melted and mixed, but the production cost and equipment cost increase significantly
Solution Approach 1:
The invention changes the temperature parameter from melting point or higher to below the melting point of all components, enabling solid-state diffusion instead of liquid-phase mixing. This parameter change eliminates the need for high-temperature heating equipment and significantly reduces energy consumption while still achieving nano-composite formation through controlled interdiffusion of components with negative heat of mixing
Solution Approach 2:
The invention utilizes solid-state diffusion and phase separation mechanisms instead of melting and solidification. By controlling heat treatment temperature and time, components with negative heat of mixing undergo interdiffusion and subsequent phase separation to form nano-scale composite structures, avoiding the energy-intensive melting process entirely
2Ease of manufacture
If heating to the melting point or higher is performed, then materials can be melted and combined, but labor and equipment complexity for handling molten metal increase
Solution Approach 1:
The invention changes the temperature parameter from melting point or higher to below the melting point of all components, enabling solid-state diffusion instead of liquid-phase mixing. This parameter change eliminates the need for high-temperature heating equipment and significantly reduces energy consumption while still achieving nano-composite formation through controlled interdiffusion of components with negative heat of mixing
Solution Approach 2:
The invention replaces the mechanical handling of molten metal with solid-state diffusion processes. Instead of using crucibles, pouring systems, and molten metal handling equipment, the process uses heat treatment apparatus to induce atomic-level interdiffusion and phase separation, eliminating complex molten metal handling infrastructure
3Manufacturing precision
If conventional melting method is used to produce nano-composite, then materials are thoroughly mixed, but the production cost increases due to high heating requirements
Solution Approach 1:
The invention changes the temperature parameter from melting point or higher to below the melting point of all components, enabling solid-state diffusion instead of liquid-phase mixing. This parameter change eliminates the need for high-temperature heating equipment and significantly reduces energy consumption while still achieving nano-composite formation through controlled interdiffusion of components with negative heat of mixing
Solution Approach 2:
The invention converts the typically harmful effect of insufficient mixing into a beneficial mechanism by utilizing solid-state diffusion and phase separation. The controlled interdiffusion of components with negative heat of mixing, followed by spinodal decomposition or nucleation and growth, naturally produces fine nano-scale composite structures without requiring high-temperature melting and vigorous mixing
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 enables the production of nano-composite metal members with reduced costs and simplified processes, producing co-continuous-structured nano-composites with intertwined components in nanometer order.
Implementation Method 1
performing heat treatment at a predetermined temperature for a predetermined length of time, so as to cause interdiffusion between the first component and the third component
Data Source
Figure 1(a)~2
Figure 3(a)~3(d)
Figure 4
AI summary
A method for producing a nano-composite metal member, by which a nano-composite metal member can be readily produced and the production cost can be reduced, and a method for joining phase-separated metal solids using the principle same as that of the former method are provided. A nano-composite metal member is obtained by bringing a solid metal body 11 comprising a first component into contact with a solid metal material 12 comprising a compound, an alloy or a non-equilibrium alloy that simultaneously contains a second component and a third component having a positive heat of mixing and a negative heat of mixing, respectively, relative to the first component, and then performing heat treatment at a predetermined temperature for a predetermined length of time, so as to cause interdiffusion between the first component and the third component.