Nanolaminated Electrodeposition via Acoustic Mass-Transfer Modulation
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Solution Overview
Problem
There is a need for methods to electrodeposit laminated coatings on workpieces that are not economically feasible or structurally suited to known rack plating methods, particularly for producing nanolaminated coatings using non-rack systems like barrel and vibratory plating.
Innovation Solution
The method involves contacting a batch of workpieces with an electrodeposition bath containing multiple electrodepositable materials and moving them within a containment apparatus to deposit layers with varying compositions, grain sizes, or thicknesses using controlled electric currents, allowing for the formation of nanolaminated coatings through mass-transfer modulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If rack plating methods are used to electrodeposit laminated coatings, then manufacturing precision and coating uniformity are improved, but device complexity and economic feasibility worsen for certain workpiece types
Solution Approach 1:
The patent replaces the mechanical rack-based electrodeposition system with an acoustic field-based deposition system. Acoustic standing waves are used to position and deposit coating materials onto workpieces without requiring complex mechanical racking structures, thereby reducing device complexity while maintaining coating precision.
Solution Approach 2:
The patent changes the fundamental parameter of the deposition process from mechanical contact-based (rack plating) to acoustic field-based. By using acoustic pressure nodes and antinodes to control material deposition, the system achieves laminated coating formation without the need for complex mechanical positioning systems.
2Ease of operation
If non-rack systems like barrel plating are used, then ease of operation and economic feasibility are improved, but manufacturing precision and coating control worsen
Solution Approach 1:
The patent employs acoustic vibration fields to achieve precise control over coating deposition. The acoustic standing waves created in the barrel create specific pressure nodes and antinodes that control where and how materials are deposited, providing manufacturing precision while maintaining the operational simplicity of barrel-style systems.
Solution Approach 2:
The patent uses periodic acoustic cycles to alternately deposit different coating materials. By controlling the timing and frequency of acoustic excitation, the system can sequentially deposit multiple layers with precise thickness control, achieving manufacturing precision through periodic action rather than continuous mechanical positioning.
3Reliability
If multiple electrodepositable materials are used to form laminated coatings, then functional properties (corrosion resistance, thermal stability) are improved, but process complexity increases
Solution Approach 1:
The patent uses a single acoustic field system to perform multiple functions: positioning workpieces, controlling deposition of different materials, and forming laminated structures. This multi-functional approach achieves reliable corrosion-resistant coatings without requiring separate processing equipment for each material layer.
Solution Approach 2:
The patent deposits multiple electrodepositable materials in alternating layers to form composite laminated coatings. Different materials (e.g., nickel, zinc, copper) are sequentially deposited using acoustic control, creating composite structures that provide enhanced corrosion resistance and thermal stability while the acoustic system manages the complexity of multi-material processing.
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 approach enables the production of nanolaminated coatings with enhanced corrosion resistance, thermal stability, and toughness, providing a cost-effective and structurally viable solution for workpieces that cannot be efficiently plated using traditional rack methods.
Implementation Method 1
electrodepositing a first identifiable layer onto at least a portion of the workpieces in the batch by applying a first electric current for a first amount of time
Implementation Method 2
mass-transfer modulation to provide compositionally modulated coatings
Data Source
AI summary
Methods for providing laminated coatings on metal articles using electroplating methods such as barrel plating, vibratory plating, rocker plating or other non-rack methods that involve movement of articles to be plated in a containment apparatus, as well as articles made from such processes. Embodiments of such processes involve mass-transfer modulation to provide compositionally modulated coatings.