研究目的
Investigating the effect of normal scratch load and HF etching on the mechanical behavior of annealed and chemically strengthened aluminosilicate glass.
研究成果
The study concludes that the flexural strength of scratched aluminosilicate glass can be significantly enhanced by HF etching, with the strength increasing up to 900MPa after treatment. The blunting and elimination of median cracks and the formation of new surfaces are identified as the main causes of strength enhancement.
研究不足
The study focuses on the effects of scratch load and HF etching on aluminosilicate glass, but the findings may not be directly applicable to other types of glass or under different environmental conditions.
1：Experimental Design and Method Selection
The study involved scratching annealed and chemically strengthened aluminosilicate glasses with a Vickers indenter under various normal loads to observe the cracking patterns and measure the flexural strength. The effect of HF etching on the scratched glass was also examined.
2：Sample Selection and Data Sources
Annealed aluminosilicate glass (AG) and chemically strengthened glass (CSG) were used. The chemical composition of AG was provided, and the strengthened layer of CSG was detected using SEM with EDS.
3：List of Experimental Equipment and Materials
Electronic scratch machine, Vickers indenter, Instron-5848 universal testing machine, high-speed camera, FEI Verios G4 Scanning Electron Microscope (SEM) with Thermo-NS7 Energy Dispersive Spectrometer (EDS), diamond wire cutting machine.
4：Experimental Procedures and Operational Workflow
Glass sheets were scratched under different normal loads, cut into specimens, and subjected to three-point bending tests. Scratched specimens were then etched with HF acid for various durations, and their flexural strength was measured.
5：Data Analysis Methods
Flexural strength was calculated from the peak load during three-point bending tests. SEM and optical microscopy were used to observe surface morphology and crack patterns.
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