Structural design of a scalable glass with high hardness and crack initiation resistance

IF 21.1 1区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Today Pub Date : 2024-09-01 DOI:10.1016/j.mattod.2024.06.009
Anjali Yadav , Anne Rebecca , Saurabh Kapoor , Yueh-Ting Shih , Liping Huang , Ashutosh Goel
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Abstract

The industry has always strived to design “hard” and “crack-resistant” glass. However, simultaneously realizing these properties in oxide glasses has been rare. Although Al2O3-rich hard and crack-resistant oxide glasses have been reported in the last decade, they exhibit two significant technological challenges that hinder their translation from laboratory to industry: (1) high processing temperatures (>2000 °C) and (2) small glass-forming regions (near eutectic). The present study reports the structural design of a hard and high modulus glass with high crack initiation resistance designed in the peraluminous region of rare-earth containing MgO–Al2O3–B2O3–SiO2 system. The glass can be processed at a temperature ≤1650 °C and exhibits Vickers hardness (Hv) of 7.84 GPa (at 1.96 N load) and indentation crack resistance (ICR) of 26.5 N. These Hv and ICR values are significantly higher than most commercial or non-commercial glasses (prior to thermal tempering, densification near Tg, or chemical strengthening). The glass has been scaled up to successfully produce slabs of dimensions 100 mm × 100 mm × 8 mm at laboratory scale with optical transmission of 90 ± 2 %. The results presented here are scientifically intriguing and have considerable tangible implications, as they pave the path for the design and development of stronger glasses for functional applications.

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具有高硬度和抗开裂性能的可扩展玻璃的结构设计
业界一直致力于设计 "坚硬 "和 "抗裂 "的玻璃。然而,在氧化物玻璃中同时实现这些特性的情况却很少见。虽然在过去十年中已有富含 Al2O3 的硬质抗裂氧化物玻璃的报道,但它们在技术上面临着两个重大挑战,阻碍了它们从实验室到工业领域的转化:(1)加工温度高(2000 °C);(2)玻璃形成区域小(接近共晶)。本研究报告介绍了在含稀土的 MgO-Al2O3-B2O3-SiO2 体系过铝区设计的一种高硬度、高模量、高抗裂性玻璃的结构设计。该玻璃的加工温度≤1650 °C,维氏硬度(Hv)为 7.84 GPa(载荷为 1.96 N 时),抗压痕开裂性能(ICR)为 26.5 N。这些 Hv 值和 ICR 值明显高于大多数商用或非商业玻璃(在热回火、接近 Tg 时的致密化或化学强化之前)。这种玻璃已在实验室规模上成功生产出尺寸为 100 mm × 100 mm × 8 mm 的板坯,其光学透射率为 90 ± 2 %。本文介绍的结果具有科学意义和相当大的实际影响,因为它们为设计和开发更强的功能性应用玻璃铺平了道路。
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来源期刊
Materials Today
Materials Today 工程技术-材料科学:综合
CiteScore
36.30
自引率
1.20%
发文量
237
审稿时长
23 days
期刊介绍: Materials Today is the leading journal in the Materials Today family, focusing on the latest and most impactful work in the materials science community. With a reputation for excellence in news and reviews, the journal has now expanded its coverage to include original research and aims to be at the forefront of the field. We welcome comprehensive articles, short communications, and review articles from established leaders in the rapidly evolving fields of materials science and related disciplines. We strive to provide authors with rigorous peer review, fast publication, and maximum exposure for their work. While we only accept the most significant manuscripts, our speedy evaluation process ensures that there are no unnecessary publication delays.
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