Solid-State Additive Deposition for Porosity-Free Dissimilar Bonding
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Solution Overview
Problem
Conventional additive manufacturing and coating techniques face limitations such as inhomogeneous material properties, porosity, oxide content, and high temperature-induced grain growth, making them unsuitable for processing thermally-sensitive materials and achieving strong adhesion between dissimilar substrates.
Innovation Solution
The solid-state additive manufacturing system employs friction-based deposition, generating heat through friction and plastic deformation to refine material microstructure, mix materials, and create chemical or physical bonding without melting, using a spindle system with a consumable filler and non-consumable tool to control grain sizes and shapes, and add reinforcements for enhanced properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional additive manufacturing or coating techniques are used, then material deposition can be achieved, but inhomogeneous material properties and porosity occur
Solution Approach 1:
The patent applies friction-based deposition with controlled friction forces and plastic deformation parameters to achieve homogeneous material properties. By adjusting spindle speed, down force, and traverse speed, the process creates uniform grain structures and eliminates porosity while maintaining material homogeneity throughout the deposit.
Solution Approach 2:
The patent replaces thermal-based additive manufacturing processes with a mechanical friction-based system. Instead of using heat to melt and deposit material, the system uses friction forces and plastic deformation to consolidate and deposit material in a solid state, eliminating the porosity and inhomogeneity associated with thermal processes.
2Manufacturing precision
If conventional coating techniques are used, then coating deposition can be achieved, but oxide content increases
Solution Approach 1:
The patent implements a controlled inert gas atmosphere during the friction-based deposition process. By maintaining an inert environment (such as nitrogen or argon atmosphere), oxidation of the deposited material is prevented, eliminating oxide content while maintaining high coating quality and material purity.
3Manufacturing precision
If high temperature processing is used, then material deposition can be achieved, but grain growth occurs leading to loss of strength
Solution Approach 1:
The patent replaces high-temperature thermal processes with a room-temperature or low-temperature mechanical friction-based process. By using friction forces and plastic deformation instead of heat to achieve material deposition and consolidation, the process avoids grain growth and maintains fine grain structures that preserve material strength.
Solution Approach 2:
The patent changes the processing temperature parameter from high temperature to room temperature or low temperature by using mechanical friction-based deposition. This parameter change prevents thermal grain growth while still achieving material consolidation and deposition through controlled friction and plastic deformation.
4Manufacturing precision
If friction-based deposition is used, then controlled microstructure can be achieved, but process complexity increases
Solution Approach 1:
The patent uses a universal friction-based deposition system that can process multiple materials (metals, polymers, ceramics, composites) and achieve multiple functions (deposition, coating, joining, surface modification) through a single integrated process. This multi-functionality reduces the need for multiple specialized equipment while maintaining precise microstructure control through adjustable friction parameters.
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 produces high-quality adhesion, improved mechanical properties, and controlled microstructures, enabling efficient processing of thermally-sensitive materials and dissimilar substrates with reduced energy consumption and environmental impact, while allowing for the creation of lightweight composite structures and surface functionalization.
Implementation Method 1
friction-based deposition, generating heat through friction and plastic deformation
Implementation Method 2
generating heat through friction and plastic deformation to refine material microstructure
Implementation Method 3
compressive loading of a consumable filler material against a workpiece (substrate, part)
Implementation Method 4
heating due to plastic deformation
Data Source
AI summary
A solid-state additive manufacturing additive manufacturing system applicable to building up 3D structures, coating and functionalizing surfaces, joining structures, adding customized features to objects, compounding proprietary compositions and repairing various structures is disclosed. The solid-state additive manufacturing system enables deposition of different fillers, viz. metals, metal alloys, MMCs, polymers, plastics, composites, hybrids and gradient compositions, as well as controls the resulting deposit structures, e.g. specific nano-/micro-, gradient- and porous-material structures. The system accommodates various feeding-, spindle- and tool-designs for depositing different forms of filler materials, viz. rods, wires, granules, powders, powder-filled-tubes, scrap pieces or their combination, and a working platform with multiple access points. One or multiple motors, driving and monitoring units control the movement of the workpiece, spindle and tool and move the filler through the feeding system, which passageway is in communication with the passageways of the spindle and the tool.