Toughening silica glass by imparting ductility using a small amount of silver nanoparticles

被引：13

作者：

Liu, Lei ^{[1
]}

Shinozaki, Kenji ^{[1
,2
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, 1-8-31 Midorigaoka, Ikeda, Osaka 5638577, Japan

[2] Japan Sci & Technol Agcy JST, PRESTO, Kawaguchi, Saitama 3320012, Japan

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2021年 / 817卷

关键词：

Silica glass; Ductility; Fracture toughness; Ag nanoparticles; Crack bridging; MECHANICAL-PROPERTIES; MICROSTRUCTURE; NANO; NANOINDENTATION; DEFORMATION; FABRICATION; CERAMICS; FRACTURE;

D O I：

10.1016/j.msea.2021.141372

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Imparting ductility to glass effectively counters brittleness caused by stress concentration. Spark plasma sintering of silica (SiO2) nanopowder and a silver nitrate mixture successfully dispersed silver (Ag) nanoparticles into a SiO2 glass matrix. The Ag-precipitated SiO2 glass showed crack bridging during crack propagation and softening owing to the ductility imparted by Ag. Compared with SiO2 glass, Ag-precipitated SiO2 glass exhibited fewer cone cracks and suppressed radial crack propagation, resulting in a significantly improved fracture toughness (2.01 +/- 0.2 MPam(1/2) for Ag-precipitated SiO2).

引用

页数：5

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