蓝宝石跨尺度强度的研究

IF 3 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materialia Pub Date : 2025-05-19 DOI:10.1016/j.mtla.2025.102439

Ronan Henry , Aurélien Doitrand , Sylvain Meille

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引用次数: 0

摘要

采用垂直于主加载方向的a面试件进行了蓝宝石在不同长度尺度上的微悬臂弯曲强度试验。采用两种类型的FIB （Ga和等离子Xe）的组合加工，可以生产出尺寸范围很广的样品，样品高度从几微米到几十微米不等。所有试样均沿m面呈现断裂面。将所得的微观抗弯强度结果与相同取向的同一试样的宏观抗弯强度结果进行了比较。在测量强度上观察到明显的尺寸效应，从微米尺度下的20 GPa到宏观尺度下的650 MPa。对不同尺寸的蓝宝石样品与文献数据进行了比较。人们发现统计模型无法捕捉整个样本量范围内的大小效应。

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Investigation of sapphire strength across the scales

The strength of sapphire across several length scales has been studied by micro-cantilever bending tests on specimens with the a-plane perpendicular to the main loading direction. The combined machining of two types of FIB (Ga and plasma Xe) is used to produce specimens with a wide range of dimensions, with specimen heights ranging from a few microns to several tens of microns. All specimens exhibit a fracture surface along m-planes. These micro-bending strength results are compared with macroscopic bending results obtained on the same sample with the same orientation. A marked size effect is observed on the measured strength, ranging from around 20 GPa at the micrometric scale down to 650 MPa for macroscopic specimens. A comparison with data from literature on sapphire samples of different size is made. Statistical models are found unable to capture the size effect on the entire range of sample sizes.

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来源期刊

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).