Understanding microstructure-mechanical properties relationship in ZrO2–SiO2 nanocrystalline glass-ceramics: The effect of ZrO2 content
发布时间：2022-03-02
点击次数：
DOI码：10.1016/j.msea.2022.142904
发表刊物：Materials Science and Engineering: A
摘要：The content of crystalline phase plays a significant role in manipulating the microstructure and mechanical properties of glass-ceramics. This study aims at exploring the optimum content of crystalline phase in ZrO2–SiO2 nanocrystalline glass-ceramics (NCGCs) in terms of obtaining the highest mechanical properties. To this end, the mechanical properties of ZrO2–SiO2 NCGCs with 70 mol%, 75 mol%, 80 mol% ZrO2 were tested and compared with those of the previously prepared NCGCs with ZrO2 content ranging from 35 mol% to 65 mol%. Results showed that 65 mol% was the optimum content of ZrO2 in terms of obtaining the highest flexural strength. The flexural strength of NCGCs with ZrO2 content over 65 mol% was lower than that of the NCGCs with 65 mol% ZrO2. This was because the NCGC with 65 mol% ZrO2 had a homogenous microstructure, with ZrO2 nanocrystallites homogeneously distributed in an amorphous SiO2 matrix. Whereas, when ZrO2 content was increased to 75 mol%, ZrO2 nanocrystallites were not homogeneously distributed in the SiO2 matrix anymore. The formation of SiO2 “holes/canyon” due to ZrO2 grain coalescence resulted in the decrease of flexural strength. The fracture mechanism and wear properties of the NCGCs were also investigated.
合写作者：Bohan Wang, Junjie Song, Guofu Xu, Qiuan Sun, Jiwu Huang, Chenglong Xu, Hakan Engqvist, Wei Xia
第一作者：Le Fu*
论文类型：期刊论文
卷号：840
页面范围：142904
是否译文：否
发表时间：2022-03-01
收录刊物：SCI
发布期刊链接：https://www.sciencedirect.com/science/article/pii/S0921509322003124