Microstructure and improved fracture toughness of borosilicate glass reinforced by 1 vol% Ag nanoparticles
Microstructure and improved fracture toughness of borosilicate glass reinforced by 1 vol% Ag nanoparticles
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微观结构%20and%20改善%20断裂%20韧性%20of%20硼硅酸盐%20玻璃%20增强%20by%201%20vol%%20Ag%20纳米颗粒
DOI：
10.1016/j.ceramint.2022.07.044
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发表时间：
2022
影响因子：
5.2
通讯作者：
Shinozaki Kenji
中科院分区：
文献类型：
--
作者：
Liu Lei;Shinozaki Kenji
通过放电等离子体烧结硼硅酸盐玻璃和硝酸银的粉末混合物，将银（Ag）纳米颗粒（1体积%）成功地结合到硼硅酸盐玻璃中。较细的玻璃粉作为起始材料导致烧结样品中Ag纳米颗粒的粗化，而粗玻璃粉作为起始材料导致原始界面处Ag纳米颗粒的高浓度沉淀。通过掺入Ag纳米颗粒增强了断裂韧性。从粗玻璃粉末和细玻璃粉末开始的样品的韧性值分别为1.76（1.9倍增加）和1.31MPa m1/2（1.4倍增加）。Ag纳米颗粒在界面的狭窄区域中以大量密度沉淀导致显著的裂纹偏转和裂纹桥接，并且因此通过从粗玻璃粉末开始获得更大的韧性改善。
Silver (Ag) nanoparticles (1 vol%) were successfully incorporated into borosilicate glass by spark plasma sintering of powder mixtures of borosilicate glass and silver nitrate. Finer glass powder as the starting material led to the coarsening of Ag nanoparticles in the sintered sample, while starting with coarse glass powder led to a high concentration of Ag nanoparticle precipitates at the original interface. The fracture toughness was enhanced by incorporating Ag nanoparticles. The toughness values of the samples starting from coarse and fine glass powders were 1.76 (1.9-fold increase) and 1.31 MPa m1/2(1.4-fold increase), respectively. The precipitation of Ag nanoparticles in a large number density in a narrow area of the interface results in significant crack deflection and crack bridging, and thus greater toughness improvement by starting with coarse glass powder.