Metal Matrix Composite Consolidation Using Current and Pressure
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Solution Overview
Problem
Conventional materials used in aerospace, propulsion, and hypersonic applications face issues such as high weight, low impact strength, brittleness, and inefficient production processes, particularly in the manufacture of metal matrix composites.
Innovation Solution
A method involving the application of electrical current and controlled pressure to consolidate matrix alloy foils and reinforcement fibers in an ambient environment, using metal stripping to seal and deoxidize the bundle, allowing for rapid production of metal matrix composites suitable for high temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional materials (nickel and cobalt base superalloys) are used for high temperature applications, then oxidation resistance and creep resistance are improved, but weight increases and strength is lost at temperatures above 1800° F
Solution Approach 1:
The patent uses metal matrix composites (MMCs) combining metal matrices with ceramic or carbon fibers to achieve high temperature performance with reduced weight. The composite structure provides oxidation and creep resistance while maintaining lower density compared to conventional superalloys.
2Temperature
If continuous fiber reinforced ceramic matrix composites are used to extend temperature range, then oxidation resistance and elevated temperature properties are improved, but impact strength and fracture toughness decrease
Solution Approach 1:
The patent employs metal matrix composites with carefully selected fiber reinforcement to balance high temperature performance with mechanical toughness. The metal matrix provides ductility and impact resistance while ceramic or carbon fibers provide high temperature strength.
3Manufacturing precision
If metal matrix composites are produced using conventional furnaces and vacuum chambers, then material quality is improved, but production time increases and cost increases
Solution Approach 1:
The patent replaces conventional thermal processing in furnaces with electromagnetic induction heating. This substitution enables rapid, controlled heating and cooling cycles without requiring expensive vacuum chambers or lengthy heat treatment processes, significantly reducing production time while maintaining material quality.
4Manufacturing precision
If heating and cooling steps are performed in conventional furnaces, then material consolidation is achieved, but time consumption increases significantly
Solution Approach 1:
The patent uses electromagnetic induction heating to replace conventional furnace heating, enabling rapid temperature changes. The induction heating system provides precise control over heating and cooling rates, achieving proper material consolidation in minutes rather than hours.
5Temperature
If carbon-carbon ceramics are used for high temperature performance, then temperature resistance is improved, but oxidation resistance decreases and toughness is insufficient
Solution Approach 1:
The patent uses metal matrix composites where the metal matrix provides oxidation resistance while ceramic or carbon fibers provide high temperature strength. This composite approach allows the material to withstand oxidizing environments at high temperatures, overcoming the limitation of carbon-carbon ceramics.
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
This method enables the efficient and economical production of high-performance metal matrix composites in large sizes, capable of withstanding temperatures between 1600° F and 2200° F, without the need for vacuum chambers or furnaces, in a fraction of the time required by traditional methods.
Implementation Method 1
Electrical current is applied into the bundle of matrix alloy foils and reinforcement fibers and the surrounding metal stripping to heat the bundle of matrix alloy foils and reinforcement
Implementation Method 2
the metal stripping at least one (i) melts at a lower temperature than the matrix alloy foils and (ii) reacts with air to remove at least one of oxygen and nitrogen from the bundle of matrix alloy foils and reinforcement fibers
Implementation Method 3
the metal stripping at least one (i) melts at a lower temperature than the matrix alloy foils
Implementation Method 4
controlled pressure is applied on the bundle of matrix alloy foils and reinforcement fiber to consolidate the bundle of matrix alloy foils and reinforcement fiber into a metal matrix composite
Data Source
AI summary
Metal matrix composite parts are manufactured by arranging matrix alloy foils and reinforcement fibers to form a bundle of matrix alloy foils and reinforcement fibers, surrounding a periphery of the bundle with metal stripping, and applying electrical current into the bundle and surrounding metal stripping while applying controlled pressure, e.g., in a press. As the bundle of matrix alloy foils and reinforcement fiber is being consolidated, the metal stripping can melt at a lower temperature than the matrix alloy foils and/or react with air to remove at least one of oxygen and nitrogen from the bundle of matrix alloy foils and reinforcement fibers. The metal matrix composite material can be consolidated in an ambient environment outside of a vacuum chamber or furnace.