Silicon Carbide Abrasive Aggregates in Vitrified Bond
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing abrasive products face challenges in achieving high material removal rates, especially on extremely hard surfaces like metals and ceramics, due to limitations in abrasive efficiency and durability.
Innovation Solution
The development of abrasive articles featuring a nonwoven web of lofty fibers with abrasive aggregates composed of silicon carbide grit particles bonded by a vitreous binder, which provides enhanced bonding and durability through a specific manufacturing process involving mixing, shaping, drying, and sintering, resulting in improved abrasive properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional abrasive products are used, then manufacturing simplicity is maintained, but abrasive efficiency and material removal rate are insufficient
Solution Approach 1:
The patent employs composite materials by combining silicon carbide abrasive grit particles with a vitreous binder to form aggregates. This composite structure integrates the high hardness and abrasiveness of silicon carbide with the bonding and durability properties of the vitreous matrix, achieving superior material removal rates while maintaining structural integrity during operation.
Solution Approach 2:
The patent utilizes parameter changes by controlling the sintering temperature (700-1100°C) and composition of the vitreous binder to optimize aggregate properties. By adjusting these parameters, the abrasive aggregates achieve enhanced hardness, bonding strength, and thermal stability, directly improving productivity on hard surfaces.
2Reliability
If conventional bonding methods are used, then manufacturing ease is maintained, but durability and bonding strength are insufficient
Solution Approach 1:
The patent exploits phase transitions by sintering the vitreous binder at high temperatures (700-1100°C), transforming it from a loose powder state to a dense, hardened matrix. This phase transition creates strong chemical bonds between the silicon carbide particles and the binder, significantly enhancing abrasive durability and resistance to mechanical stress.
Solution Approach 2:
The patent replaces conventional mechanical bonding methods with thermal-sintering processes. Instead of relying on physical interlocking or simple adhesives, the vitreous binder is fused to the abrasive particles through controlled heating, creating a more durable and reliable bond that withstands the demanding conditions of industrial abrasion.
3Productivity
If simple abrasive structures are used, then ease of operation is maintained, but abrasive efficiency on hard surfaces is insufficient
Solution Approach 1:
The patent applies segmentation by dividing the abrasive system into discrete aggregates, each consisting of multiple silicon carbide particles embedded in a vitreous binder matrix. This segmented structure allows each aggregate to function as an independent abrasive unit, maintaining high cutting efficiency while the collective assembly provides durability and consistency across the abrasive surface.
Solution Approach 2:
The patent uses composite materials to create aggregates that combine the sharpness and hardness of silicon carbide particles with the cohesive strength of the vitreous binder. This composite structure enables the abrasive to efficiently cut hard surfaces like metals and ceramics while maintaining structural integrity, thereby improving productivity without excessive complexity.
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
The abrasive articles demonstrate increased abrasive efficiency and durability, as evidenced by higher cut and grind ratios and improved surface finish, outperforming conventional abrasive products in industrial applications.
Implementation Method 1
a vitreous binder composition and a plurality of silicon carbide abrasive grit particles dispersed in the vitreous binder, and wherein the vitreous binder composition comprises a sintering temperature (Ts) in a range of 700° C. to 1100° C.
Data Source
AI summary
The present disclosure relates to abrasive articles that include abrasive aggregates of silicon carbide with a vitrified bond, and methods of making and using such abrasive articles and abrasive aggregates. In particular, the abrasive aggregates can possess a combination of beneficial properties and comprise a vitreous binder composition having a specific composition, sintering temperature, glass transition temperature, or a combination thereof.