Abstract The strength of glass depends on the size of flaws existing on its surface. Therefore, its strength considerably deteriorates once a large flaw is generated upon contact with harder materials. Such mechanical failure renders the glass unreliable, which can cause severe problems in practice. In this work, the damage resistance of CaO–Al2O3–SiO2 (CAS) glass-ceramic (GC) was evaluated through bending tests. The test was conducted using abraded samples with conventional soda–lime–silica (SLS) glass as a reference. Although the strength of the SLS glass decreased to less than 50 MPa after abrasion, CAS-GC maintained an average strength of 100 MPa with a higher Weibull distribution number. Large sharp flaws, which act as a stress concentrator, were not observed in CAS-GC. This observation was consistent with the microcrack formation instead of the radial crack around Vickers indentation in CAS-GC.

中文翻译：

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抗损伤CaO-Al2O3-SiO2微晶玻璃的实用强度

摘要 玻璃的强度取决于其表面存在的缺陷的大小。因此，一旦与较硬的材料接触而产生大的裂纹，其强度就会显着下降。这种机械故障使玻璃变得不可靠，这在实践中会导致严重的问题。在这项工作中，通过弯曲试验评估了 CaO–Al2O3–SiO2 (CAS) 微晶玻璃 (GC) 的抗损伤性。该测试是使用磨蚀过的样品进行的，使用传统的钠钙硅 (SLS) 玻璃作为参考。尽管 SLS 玻璃的强度在磨损后下降到小于 50 MPa，但 CAS-GC 保持了 100 MPa 的平均强度，并具有更高的威布尔分布数。在 CAS-GC 中没有观察到作为应力集中器的大的尖锐缺陷。