Morphology of subsurface cracks in glass-ceramics induced by Vickers indentation observed by synchrotron X-ray multiscale tomography

被引：24

作者：

Okuma, Gaku ^{[1
]}

Maeda, Kei ^{[2
]}

Yoshida, Satoshi ^{[3
]}

Takeuchi, Akihisa ^{[4
]}

Wakai, Fumihiro ^{[1
]}

机构：

[1] Natl Inst Mat Sci, Res Ctr Struct Mat, 1-2-1 Sengen, Tsukuba, Ibaraki 3050047, Japan

[2] Tokyo Univ Sci, Dept Mat Sci & Technol, Katsushika Ku, 6-3-1 Niijuku, Tokyo 1258585, Japan

[3] AGC Inc, Tsurumi Ku, Yokohama Tech Ctr, 1-1 Suehiro Cho, Yokohama, Kanagawa 2300045, Japan

[4] Japan Synchrotron Radiat Res Inst, JASRI SPring 8, Kouto 1-1-1, Sayo, Hyogo 6795198, Japan

来源：

SCIENTIFIC REPORTS | 2022年 / 12卷 / 01期

关键词：

CAO-AL2O3-SIO2; GLASS; MECHANICAL-PROPERTIES; DEFLECTION PROCESSES; FRACTURE; DAMAGE; MICROSTRUCTURE; PRECIPITATION; STRENGTH; DESIGN;

D O I：

10.1038/s41598-022-11084-0

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The characterization of subsurface cracks induced by indentation is a challenge for understanding contact damage, impact, wear, erosion, and abrasion of brittle materials, because the crack pattern observable on the surface is only a part of the total crack system. Here we applied synchrotron X-ray multiscale tomography to observe the morphology of subsurface cracks produced by Vickers indentation in a novel CaO-Al2O3-SiO2 glass-ceramic with plate-like crystals forming a house-of-cards microstructure. It revealed a diverse type of crack systems around the semispherical microcrack zone beneath the indent, including a new mode II inclined lateral crack driven by the maximum shear stress. Tomography images provided knowledge on how the heterogeneous microstructure affected the toughening processes such as crack deflection, crack bridging, and microcracking.

引用

页数：10

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