Mechanical Properties of Ag+/Na+ Ion-exchanged Aluminosilicate Glasses

• Published in: Journal of the Ceramic Society of Japan 2007, Vol.115 (1342), p.354
• Main Authors: FUNABIKI, Fuji, YANO, Tetsuji, SHIBATA, Shuichi, YAMANE, Masayuki
• Format: Article
• Language: English
• ISSN: 1882-0743; 1348-6535
• DOI: 10.2109/jcersj.115.354

Mechanical properties of Ag+/Na+ ion-exchanged aluminosilicate glasses are investigated. The aluminosilicate glass samples with the thickness of 1 mm and homogeneous Ag+/Na+ concentrations were prepared via the ion exchange in the molten salt at 450°C and the following post-heating in the ambient atmosphere. Measured Young's modulus, Vickers hardness and fracture toughness in a dry nitrogen atmosphere change nonlinearly with increasing Ag/(Ag+Na) ratio, and show the maximum values, 75 GPa, 560 kg/mm2 and 0.84 MN/m3/2 around Ag/(Ag+Na)=50%, respectively. Fully exchanged glass shows the same modulus 70 GPa as that of the mother glass and the smallest hardness and toughness, 500 kg/mm2 and 0.74 MN/m3/2, respectively. The calculated yield stress decreases from 2.59 GPa to 2.30 GPa with increasing Ag/(Ag+Na) at more than 60% region. Coexistence of Ag+/Na+ induces mixed cation effect, and gives a maximum to the elastic modulus at Ag : Na=1 : 1. Additionally, the yield stress of glass is decreased with increasing Ag+ concentration by the difference of the effect on Al-O-Si network between Ag+ and Na+.