Friction Additives Using Fe-Mo Intermetallic and Copper Oxide
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Solution Overview
Problem
The need for friction lining compositions that replace asbestos while maintaining its beneficial characteristics, such as heat control, friction regeneration, and wear resistance, has arisen due to health hazards associated with asbestos fibers, necessitating the development of alternative materials that enhance coefficient of friction, braking effectiveness, thermal stability, and wear resistance.
Innovation Solution
The use of a blend of Fe—Mo Intermetallic and copper oxide, or Fe—Mo Intermetallic, copper oxide, and calcium carbonate additives in friction lining compositions, which improve brake performance by enhancing fade resistance, hardness, strength, and thermal stability, and reduce wear, through catalytic effects on the curing process of binders like phenolic resin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If asbestos is used in friction linings, then heat control, friction regeneration and wear resistance are improved, but health hazards increase due to asbestos fibers
Solution Approach 1:
The patent removes asbestos from the friction lining composition entirely and replaces it with alternative materials including Fe-Mo intermetallic, copper oxide, and calcium carbonate. This extraction eliminates the harmful asbestos fibers while maintaining the functional performance through the combined action of the replacement materials.
Solution Approach 2:
The patent employs a composite material system consisting of multiple components (Fe-Mo intermetallic, copper oxide, calcium carbonate, and other friction lining materials) that work together to replicate and enhance the performance previously achieved by asbestos alone, while avoiding its health hazards.
2Loss of substance
If additive constituents and concentrations are changed, then wear performance may be enhanced, but braking effectiveness is reduced
Solution Approach 1:
The patent optimizes the concentrations of additive constituents within specific ranges (Fe-Mo intermetallic: 1-20 wt%, copper oxide: 1-20 wt%, calcium carbonate: 1-20 wt%) to achieve the desired balance between wear resistance and braking effectiveness. These parameter changes ensure that no single additive dominates while maintaining overall performance.
Solution Approach 2:
The patent uses a composite additive system where Fe-Mo intermetallic, copper oxide, and calcium carbonate work synergistically. Each component contributes different properties that balance wear resistance and braking effectiveness, preventing the trade-off that occurs when single additives are used in excess.
3Stability of the object's composition
If Fe—Mo Intermetallic and copper oxide additives are used, then thermal stability and hardness are improved, but formulation complexity increases
Solution Approach 1:
The patent employs a composite additive system where Fe-Mo intermetallic, copper oxide, and calcium carbonate work synergistically. Each component contributes different properties that balance wear resistance and braking effectiveness, preventing the trade-off that occurs when single additives are used in excess.
Solution Approach 2:
The patent optimizes the concentrations of additive constituents within specific ranges (Fe-Mo intermetallic: 1-20 wt%, copper oxide: 1-20 wt%, calcium carbonate: 1-20 wt%) to achieve the desired balance between wear resistance and braking effectiveness. These parameter changes ensure that no single additive dominates while maintaining overall performance.
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
These additives result in improved braking effectiveness, increased thermal stability, and reduced wear, with the Fe—Mo Intermetallic and copper oxide compositions providing enhanced frictional performance, and the addition of calcium carbonate further improving braking effectiveness and reducing speed sensitivity and fade.
Implementation Method 1
The use of a blend of Fe—Mo Intermetallic and copper oxide, or Fe—Mo Intermetallic, copper oxide, and calcium carbonate additives in friction lining compositions, which improve brake performance by enhancing fade resistance, hardness, strength, and thermal stability, and reduce wear, through catalytic effects on the curing process of binders like phenolic resin.
Implementation Method 2
Their primary purpose is to decelerate and stop a vehicle by transforming the kinetic energy of the system into heat via friction and then dissipating the heat to the surroundings.
Data Source
AI summary
The claimed invention involves a novel composition of matter comprising a mixture of Fe—Mo Intermetallic and copper oxide. A novel composition of matter of Fe—Mo Intermetallic, copper oxide and calcium carbonate is also claimed. The claimed invention also involves a novel friction lining additive comprising Fe—Mo Intermetallic and copper oxide for improved braking effectiveness. Fe—Mo Intermetallic, copper oxide and calcium carbonate may also be used as a friction lining additive according to the present invention. The claimed invention also includes a novel motor brush comprising Fe—Mo Intermetallic and copper oxide for improved wear. Fe—Mo Intermetallic, copper oxide and calcium carbonate may also be used as a motor brush additive according to the present invention.