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首页> 外文期刊>CERAMICS INTERNATIONAL >Effect of normal scratch load and HF etching on the mechanical behavior of annealed and chemically strengthened aluminosilicate glass
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Effect of normal scratch load and HF etching on the mechanical behavior of annealed and chemically strengthened aluminosilicate glass

机译：正常划痕载荷和HF蚀刻对退火和化学加强铝硅酸盐玻璃的力学行为的影响

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摘要

Micro-cracks generated by hard body scratch are a major cause of strength decrease for silicate glass. The influence of normal scratch load on the cracking patterns and flexural strength of annealed glass (AG) and chemically strengthened glass (CSG) were studied. With the increase of the normal load, the load capacity of scratched AG specimens decreased to about 40 MPa at 20gf immediately. However, the residual strength of CSG decreased to a steady value of 145 MPa as the scratch load increased to 500gf. Then the effect of hydrofluoric acid (HF) etching on the surface morphology and mechanical properties of the 500gf scratched glass were investigated. After 8min (for CSG) and 16 min (for AG) acid treatment, the flexural strength of CSG and AG increased to a considerable value of 900 MPa, which is 3.6 and 5.5 times higher than the flexural strength of undamaged specimens. Microscopic observations show that the blunting and eliminating of median cracks as well as the formation of new surfaces are the main causes of strength enhancement.
机译：硬体划痕产生的微裂纹是硅酸盐玻璃的强度降低的主要原因。研究了正常划痕载荷对退火玻璃（Ag）和化学加强玻璃（CSG）的裂缝图案和弯曲强度的影响。随着正常载荷的增加，划痕Ag样品的负载能力立即降低至约40MPa。然而，随着划痕载荷增加到500GF，CSG的残余强度降低到145MPa的稳定值。然后研究了氢氟酸（HF）蚀刻对500GF刮擦玻璃的表面形态和机械性能的影响。 8min（对于CSG）和16分钟（对于Ag）酸处理后，CSG和AG的抗弯强度增加到900MPa的相当值，比未损坏标本的弯曲强度高3.6％和5.5倍。微观观察表明，钻孔和消除中值裂缝以及新表面的形成是强度增强的主要原因。

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