Bent Glass Article With Local Beilby Layer for Scratch and Impact Resistance
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Solution Overview
Problem
Glass articles used in electronic devices, particularly those with an obtuse angle side portion, are susceptible to damage from external impacts and require improved scratch resistance and strength.
Innovation Solution
A glass article design featuring a flat portion and side portion with a Beilby layer on the flat portion but not the side portion, where the Beilby layer fills cracks on the flat portion and is partially applied on the side portion, enhancing scratch resistance and strength through cerium-based polishing processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a glass article is made thin for portability, then the weight and size are reduced, but the strength and impact resistance deteriorate
Solution Approach 1:
The patent applies local quality by creating a Beilby layer with different properties (higher hardness, filled cracks) specifically on the flat portion where scratch resistance is needed, while leaving the side portion with original properties for impact absorption. This localized modification allows thin glass to maintain strength without increasing overall weight.
2Shape
If the side portion is designed with an obtuse angle for aesthetic purposes, then the shape is improved, but the scratch resistance and strength at the edges deteriorate
Solution Approach 1:
The patent deliberately creates different surface conditions for different regions: the flat portion receives the Beilby layer treatment for scratch resistance, while the side portion with obtuse angles maintains its original structure. This local differentiation allows the glass to have both aesthetic shape and appropriate functional properties in each region.
3Strength
If a Beilby layer is applied on the flat portion to improve scratch resistance, then the scratch resistance is improved, but the manufacturing complexity increases
Solution Approach 1:
The patent reduces manufacturing complexity by applying the Beilby layer treatment only to the flat portion rather than the entire glass surface. This selective application simplifies the manufacturing process compared to full-surface treatment while still achieving the desired scratch resistance improvement.
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 glass article exhibits improved scratch resistance and strength, demonstrated by increased performance in ball drop and edge impact tests, with the Beilby layer effectively concealing cracks and reinforcing the glass structure.
Implementation Method 1
a Beilby layer disposed on the flat portion and not disposed on at least a part of the side portion
Implementation Method 2
enhancing scratch resistance and strength through cerium-based polishing processes
Data Source
AI summary
A glass article includes a flat portion and a side portion extending from the flat portion and bent in a thickness direction of the glass article, a base disposed on the flat portion and the side portion; and a Beilby layer disposed on the flat portion and not disposed on at least a part of the side portion.