Abrasive Coating Remelting for Particle Encapsulation and Smoother Surfaces
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Solution Overview
Problem
Existing abrasive coatings with metal matrices and ceramic abrasive particles, deposited using electroplating or additive manufacturing, face limitations such as compatibility with low-temperature alloys and higher surface roughness, leading to reduced effectiveness and shorter lifetimes due to incomplete sealing and potential abrasive particle dislodgment.
Innovation Solution
The method involves post-processing abrasive coatings using directed energy deposition to add additional metal matrix material and/or softening/melting the existing metal matrix with a laser or plasma energy source to encapsulate abrasive particles, reduce surface roughness, and achieve uniformity, allowing the use of high-temperature alloys like nickel- or cobalt-based superalloys.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If electroplating is used to deposit abrasive coatings, then the coating process is compatible with certain alloys, but the alloy selection is limited to low-temperature alloys
Solution Approach 1:
The patent replaces electroplating (electrical/chemical process) with directed energy deposition (thermal process). This substitution enables the use of high-temperature alloys like nickel- and cobalt-based superalloys that are incompatible with electroplating, thereby resolving the contradiction between process compatibility and temperature range.
2Temperature
If additive manufacturing is used to deposit abrasive coatings, then high-temperature alloys can be used, but the surface roughness increases
Solution Approach 1:
The patent replaces additive manufacturing (layer-by-layer deposition) with directed energy deposition followed by laser smoothing (energy-based surface treatment). This substitution reduces surface roughness while maintaining compatibility with high-temperature alloys, resolving the contradiction between temperature range and manufacturing precision.
Solution Approach 2:
The patent changes the energy input parameters by applying laser energy to melt and smooth the deposited coating surface. This parameter change (thermal energy application) reduces surface roughness while preserving the high-temperature alloy composition, thereby resolving the contradiction between temperature range and surface finish quality.
3Strength
If higher surface roughness is present in abrasive coatings, then particle embedding may be reduced, but sealing effectiveness decreases
Solution Approach 1:
The patent applies laser energy to change the surface parameters by melting and smoothing the coating surface. This creates optimal conditions for abrasive particle embedding while simultaneously improving sealing effectiveness, thereby resolving the contradiction between particle embedding strength and sealing reliability.
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 enhances the durability and effectiveness of abrasive coatings by improving particle encapsulation, reducing surface roughness, and extending their lifespan, while enabling their use in high-temperature applications with better sealing performance.
Implementation Method 1
softening/melting the existing metal matrix with a laser or plasma energy source
Implementation Method 2
softening/melting the existing metal matrix with a laser or plasma energy source
Implementation Method 3
post-processing abrasive coatings using directed energy deposition to add additional metal matrix material
Data Source
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AI summary
A method for processing an abrasive coating after deposition of the abrasive coating to improve properties of the abrasive coating. The method involves: controlling, by a computing device, an energy delivery device to deliver energy to an abrasive coating, wherein the abrasive coating comprises a metal matrix and abrasive particles at least partially encapsulated by the metal matrix; and controlling, by the computing device, the energy delivery device to scan the energy across a surface of the abrasive coating and form a series of softened or melted portions of the metal matrix.