由玻璃基体和玻璃或陶瓷颗粒组成的弹性性能不匹配的脆性颗粒复合材料的断裂行为

IF 3 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Tanguy Lacondemine , Julien Moriceau , Theany To , Patrick Houizot , Fabrice Célarié , Dusan Galusek , Jozef Kraxner , Marion Vandenhende , Gaëlle Delaizir , Raphael Langlois , Julien Réthoré , Jérôme Adrien , Eric Maire , Tanguy Rouxel
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引用次数: 0

摘要

这项工作有两个目的:i) 制备具有更好断裂性能的致密透明无机玻璃复合材料;ii) 测试 [1] 中提出的基于泊松比失配的理论分析。我们合成了玻璃或陶瓷微粒嵌入钠钙硅玻璃基体中的微粒复合材料,并通过单边预裂梁(SEPB)和双裂钻孔压缩(DCDC)方法对其断裂行为进行了研究,在可能的情况下使用 X 射线断层扫描进行现场实验。在 DCDC 实验中观察到 T 应力对断裂韧性(KIc)的重要影响。通过加入 7 体积百分比的无定形二氧化硅珠或平均粒径为 40 μm 的 SrAl2O4:Eu,Dy 陶瓷颗粒 (SAED),KIc 增加了约 40%。研究表明,a-SiO2 颗粒的增韧源于裂纹前沿在颗粒位置的捕获和钉扎,以及曲折的裂纹路径;而 SAED 颗粒的增韧源于陶瓷颗粒固有的断裂表面能,它被扩展的裂纹劈开。热诱导应力场被认为在 a-SiO2 颗粒中起主要作用。生产玻璃珠时使用了两种玻璃牌号,它们的杨氏模量与基体的杨氏模量相似,但泊松比要大得多。然而,在基体中加入后一种玻璃珠对断裂行为的影响很小。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Fracture behavior of brittle particulate composites consisting of a glass matrix and glass or ceramic particles with elastic property mismatch

Fracture behavior of brittle particulate composites consisting of a glass matrix and glass or ceramic particles with elastic property mismatch
The aim of this work is two-fold: i) elaborating dense and transparent inorganic glass composites with improved fracture properties, and ii) testing the theoretical analysis proposed in [1] and based on Poisson's ratio mismatch. Particulate composites, consisting of glass or ceramic particles embedded in a soda-lime-silica glass matrix, were synthesized and their fracture behavior was studied by means of the Single-Edge Precraked Beam (SEPB) and Double Cleavage Drilled Compression (DCDC) methods, using in situ experiments with X-ray tomography where possible. An important effect of the T-stress on the fracture toughness (KIc) was observed in the case of DCDC experiments. KIc is increased by about 40 % by incorporating 7 vol. % amorphous silica beads or SrAl2O4:Eu,Dy ceramic particles (SAED) with a 40 μm mean particle size. It is suggested that toughening results from the crack front trapping and pinning at particle sites and from the tortuous crack path in the case of a-SiO2 particles, and from the contribution of the intrinsic fracture surface energy of the ceramic particles, which are cleaved by the propagating crack, in the case of the SAED particles. The thermally induced stress field is believed to play a major role in the case of a-SiO2 particles. Two glass grades possessing Young's moduli similar to the one of the matrix but much larger Poisson's ratios were used to produce glass beads. However, the incorporation of these latter beads in the matrix was found to have a minor incidence on the fracture behavior.
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来源期刊
Materialia
Materialia MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
6.40
自引率
2.90%
发文量
345
审稿时长
36 days
期刊介绍: Materialia is a multidisciplinary journal of materials science and engineering that publishes original peer-reviewed research articles. Articles in Materialia advance the understanding of the relationship between processing, structure, property, and function of materials. Materialia publishes full-length research articles, review articles, and letters (short communications). In addition to receiving direct submissions, Materialia also accepts transfers from Acta Materialia, Inc. partner journals. Materialia offers authors the choice to publish on an open access model (with author fee), or on a subscription model (with no author fee).
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