CaO取代Na2O对硅酸盐玻璃裂纹形态和力学性能的影响

IF 3.2 3区 材料科学 Q1 MATERIALS SCIENCE, CERAMICS
Yuanyuan Kang , Zhitao Shan , Shujiang Liu , Jun Zhang , Yanfei Zhang , Yuanzheng Yue
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引用次数: 0

摘要

本文研究了不同CaO/(Na2O+CaO)比(R)的硅硼酸盐玻璃在尖锐接触载荷下的微裂行为。该玻璃系的摩尔组成为22SiO2-58B2O3-XNa2O -(20-X) CaO (X = 20、15、10、5、0),在4.9 N恒定载荷作用15 s时,玻璃发生剪切裂纹。有趣的是,剪切裂纹发生的概率随着r的增大而减小。利用拉曼光谱和x射线光电子能谱分析发现,玻璃的微裂纹发生和抗裂性(CR)与玻璃中程结构的变化密切相关。当临界R值为0.75时,玻璃的杨氏模量、剪切模量和CR均达到最高,剪切裂纹的出现主要受中等范围结构和等时剪切流的控制。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Evolution of the crack patterns and mechanical properties of silicoborate glasses with substitution of CaO for Na2O
In this work, we investigated the microcracking behavior of a series of silicoborate glasses with varying the CaO/(Na2O+CaO) ratio (R) under sharp contact loading. The molar composition of the glass series is 22SiO2–58B2O3–XNa2O-(20-X) CaO (X = 20, 15,10, 5, 0). We found that the shear cracks occurred in the studied glasses when subjecting to a constant load of 4.9 N for 15 s. Interestingly, the probability of the shear crack occurrence decreases with increasing R. Using the Raman spectroscopy and X-ray photoelectron spectroscopy, it was found that the microcrack occurrence and crack resistance (CR) of the glass was closely associated with the change of the glass medium-range structure. We identified a critical R value of 0.75, at which the glass exhibited the highest Young's modulus, shear modulus and CR. Furthermore, the appearance of shear cracks is primarily governed by the medium-range structure and isochoric shear flow.
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来源期刊
Journal of Non-crystalline Solids
Journal of Non-crystalline Solids 工程技术-材料科学:硅酸盐
CiteScore
6.50
自引率
11.40%
发文量
576
审稿时长
35 days
期刊介绍: The Journal of Non-Crystalline Solids publishes review articles, research papers, and Letters to the Editor on amorphous and glassy materials, including inorganic, organic, polymeric, hybrid and metallic systems. Papers on partially glassy materials, such as glass-ceramics and glass-matrix composites, and papers involving the liquid state are also included in so far as the properties of the liquid are relevant for the formation of the solid. In all cases the papers must demonstrate both novelty and importance to the field, by way of significant advances in understanding or application of non-crystalline solids; in the case of Letters, a compelling case must also be made for expedited handling.
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