Low-Temperature Solidification for Monolithic Bodies
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current additive manufacturing methods are limited in their ability to produce monolithic bodies from a wide range of materials, including metals, ceramics, and composites, as they are often specific to either metals or polymers, and typically require high temperatures that can cause material shrinkage and are unsuitable for materials that cannot withstand such temperatures.
Innovation Solution
The use of low temperature solidification in additive manufacturing processes, where a porous matrix with interstitial spaces is infiltrated by a reactant medium, allowing a reaction to form a product that fills the spaces, thereby producing a monolithic body without significant shrinkage, using temperatures below 500°C, such as 80-200°C, and pressures less than 100,000 psi.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If high temperature processing is used in conventional additive manufacturing, then materials can be processed and components can be formed, but material shrinkage occurs and materials that cannot withstand high temperatures cannot be processed
Solution Approach 1:
The patent fundamentally changes the processing temperature parameter from conventional high temperatures (>500°C) to low temperatures (below 500°C, preferably 80-200°C). This parameter change enables processing of temperature-sensitive materials while preventing thermal shrinkage and distortion, thereby resolving the contradiction between material versatility and dimensional accuracy
Solution Approach 2:
The patent replaces conventional thermal sintering mechanisms with low-temperature chemical reaction mechanisms. Instead of relying on high heat to fuse particles, the system uses chemical reactions between reactants in the porous matrix and infiltrating medium to form solid products at low temperatures, eliminating thermal shrinkage while enabling processing of diverse materials
2Strength
If high temperature sintering is used to form monolithic bodies, then material bonding is achieved, but significant shrinkage and distortion occur
Solution Approach 1:
The patent substitutes thermal bonding mechanisms with chemical bonding mechanisms. Chemical reactions between reactants form strong bonds at low temperatures without the thermal shrinkage and distortion associated with high-temperature sintering, thereby achieving both strong material bonding and dimensional stability
Solution Approach 2:
The patent employs composite material systems consisting of porous matrices with reactants and infiltrating media with complementary reactants. These composite systems enable low-temperature chemical bonding that produces strong monolithic bodies while maintaining dimensional stability, resolving the contradiction between bonding strength and dimensional precision
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 production of monolithic bodies with minimal shrinkage and allows for the creation of materials that cannot be processed with conventional high-temperature methods, expanding the range of materials that can be manufactured, including metals, ceramics, and composites, while maintaining the original size and structure.
Implementation Method 1
allowing the infiltrating medium to infiltrate at least a portion of the interstitial spaces of the layer of the porous matrix
Implementation Method 2
an infiltrating medium that carries at least a second reactant
Implementation Method 3
conditions that promote a reaction between the at least first reactant and the at least second reactant to provide at least a first product
Implementation Method 4
low temperature solidification in an additive manufacturing process
Data Source
AI summary
A method of producing a monolithic body from a porous matrix includes using low temperature solidification in an additive manufacturing process.