Liquid Metallic Glass Coating for Smooth Surface Finish
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Solution Overview
Problem
Current techniques for implementing metallic glass layers, such as thermal spraying, sputtering, and chemical vapor deposition, face limitations including rough surface finishes, high costs, and restricted thickness, which hinder the broader application of metallic glasses due to their high critical cooling rates and material constraints.
Innovation Solution
Applying a sufficient quantity of liquid phase metallic glass with a low critical cooling rate to an object, allowing it to cool and form a solid phase metallic glass layer, which can achieve thicknesses greater than 50 micrometers and up to several millimeters, using methods like dipping, pouring, and spinning, often in an inert environment to prevent contamination and ensure a smooth surface finish.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If thermal spraying, sputtering, or chemical vapor deposition is used to implement metallic glass layers, then metallic glass coatings can be formed, but the surface finish becomes rough and production costs increase
Solution Approach 1:
The patent changes the physical state parameter of metallic glass from solid particles (thermal spraying) or thin films (sputtering/CVD) to liquid phase, enabling sufficient quantity application that forms smooth surfaces through surface tension while reducing production costs
Solution Approach 2:
The patent uses a disposable mold approach where liquid metallic glass is poured into molds and allows complete solidification, eliminating the need for expensive thermal spraying equipment or complex deposition systems while achieving smooth surfaces
2Length of stationary object
If conventional metallic glass formation with high critical cooling rates is used, then metallic glass can be formed, but the thickness is limited to thin coatings
Solution Approach 1:
The patent changes the cooling rate parameter from extremely high rates (10^6 K/s) to moderate rates (<1000 K/s) by using liquid phase application and controlled solidification, enabling thicknesses greater than 50 micrometers while maintaining metallic glass structure
Solution Approach 2:
The patent applies liquid metallic glass in sufficient quantity beforehand, allowing the material to settle and form a smooth surface before cooling, and uses mold containment to maintain geometry during the extended solidification process
3Manufacturing precision
If liquid phase metallic glass is applied in sufficient quantity to form smooth surfaces, then surface tension creates smooth coating, but the cooling process becomes more challenging
Solution Approach 1:
The patent uses an inert atmosphere as an intermediary environment that prevents oxidation and contamination during the cooling process, and employs mold containment as a thermal intermediary that controls heat transfer rates during solidification
Solution Approach 2:
The patent applies metallic glass in an inert atmosphere to prevent oxidation and contamination during the cooling process, ensuring material purity and preventing surface defects while allowing controlled solidification
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 formation of thicker, smoother metallic glass layers with enhanced structural integrity and aesthetic appeal, suitable for various applications, including biomedical and industrial uses, while reducing production costs and overcoming previous thickness limitations.
Implementation Method 1
cooling the coating layer of liquid phase metallic glass to form a layer of solid phase metallic glass
Implementation Method 2
the surface tension of the liquid phase metallic glass causes the coating layer to have a smooth surface
Data Source
AI summary
Systems and methods in accordance with embodiments of the invention implement layers of metallic glass-based materials. In one embodiment, a method of fabricating a layer of metallic glass includes: applying a coating layer of liquid phase metallic glass to an object, the coating layer being applied in a sufficient quantity such that the surface tension of the liquid phase metallic glass causes the coating layer to have a smooth surface; where the metallic glass has a critical cooling rate less than 1000 K/s; and cooling the coating layer of liquid phase metallic glass to form a layer of solid phase metallic glass.