Amorphous Metal Coatings With Solid Lubricants for Engine Wear
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Solution Overview
Problem
Friction and wear at mechanical contacts in gas turbine engines degrade performance and reduce the useful lifetime of components such as bearings, seals, and gears.
Innovation Solution
Application of friction reducing coatings and textured surfaces, comprising amorphous metals with dispersed solid lubricants, to reduce friction and wear in components like bearings, gears, and seals, even in the absence of fluid lubricants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If friction reducing coatings with solid lubricants are applied to mechanical contact surfaces, then friction and wear are reduced, but coating complexity and manufacturing difficulty increase
Solution Approach 1:
The patent applies composite material principle by combining amorphous metal matrix with solid lubricant particles (such as MoS2, WS2, or graphite) to create a friction reducing coating. The composite structure integrates the mechanical strength of amorphous metal with the low-friction properties of solid lubricants, achieving both wear resistance and reduced coefficient of friction while maintaining coating integrity during application
Solution Approach 2:
The patent utilizes parameter changes by controlling the coating thickness (1-10 micrometers), solid lubricant particle size (1-10 micrometers), and composition ratios to optimize friction reduction performance. The amorphous metal composition is tailored with specific elements (Fe, Cr, Mo, Ni, Co, Cu, Mn, B, Si, C) in controlled proportions to achieve desired mechanical properties and lubrication characteristics
2Reliability
If textured surfaces are created to trap lubricants, then friction reduction is improved, but surface manufacturing precision requirements increase
Solution Approach 1:
The patent applies porous material principle by creating textured surfaces with controlled roughness (Ra 0.2-2.0 micrometers) that form micro-reservoirs and channels capable of trapping and retaining lubricant films. The textured structure provides increased surface area and micro-cavities that hold lubricant, ensuring continuous lubrication during operation while maintaining manufacturability through controlled surface treatment processes
3Strength
If amorphous metal coatings with dispersed solid lubricants are used, then wear resistance is enhanced, but coating application process complexity increases
Solution Approach 1:
The patent applies self-service principle by designing the coating to automatically transfer solid lubricant particles to the contacting surface during operation. The amorphous metal matrix erodes controllably to expose and transfer embedded lubricant particles (MoS2, WS2, or graphite) to the counterface, creating a self-lubricating system that reduces friction without requiring external lubrication infrastructure or complex application processes
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
Significantly reduces friction and wear, enhancing the performance and longevity of engine components by trapping lubricants and providing solid lubrication at contact points.
Implementation Method 1
a solid lubricant, and a dispersed amount of the solid lubricant throughout the coating
Implementation Method 2
the textured surface can trap the lubricant in the contact region
Data Source
AI summary
A coating to reduce friction, the coating including an amorphous metal, and a solid lubricant. The solid lubricant may be dispersed with the amorphous metal throughout the coating, or the solid lubricant may form a layer on top of the amorphous metal. The coating may be applied to various components such as aircraft components, gas turbine engine components, etc., to reduce friction.