Scratch hardness of rare-earth substituted calcium aluminosilicate glasses

She J, Sawamura S, Wondraczek L (2019)

Publication Type: Journal article

Publication year: 2019

Journal

Journal of Non-Crystalline Solids: X Elsevier

Book Volume: 1

Article Number: 100010

DOI: 10.1016/j.nocx.2019.100010

Abstract

We report lateral deformation experiments on rare earth substituted glasses from percalcic CaO-Al 2 O 3 -SiO 2 -Tm 2 O 3 . Using instrumented Berkovich indentation with normal loads below 100 mN, the scratch hardness was obtained from the work of lateral deformation per deformed volume in the elastic-plastic regime. The positive effect of rare-earth substitution on normal hardness, Poisson's ratio and Young's modulus was found to extent also to scratch hardness: in 25CaO-15Al 2 O 3 -60SiO 2 , partial replacement of alumina by Tm 2 O 3 leads to an enhancement of the scratch hardness by about 1 GPa per 2 mol% of substitution, reaching the highest values of scratch hardness which have been reported for oxide glasses thus far. The enhancement of scratch hardness is attributed to enhanced cation packing fraction and super-structural cohesion as a result of rare earth substitution. The previously reported linear correlation between scratch hardness and bulk modulus is confirmed.

Authors with CRIS profile

Lothar Wondraczek

Involved external institutions

Friedrich-Schiller-Universität Jena DE Germany (DE)

How to cite

APA:

She, J., Sawamura, S., & Wondraczek, L. (2019). Scratch hardness of rare-earth substituted calcium aluminosilicate glasses. Journal of Non-Crystalline Solids: X, 1. https://doi.org/10.1016/j.nocx.2019.100010

MLA:

She, Jiangbo, Shigeki Sawamura, and Lothar Wondraczek. "Scratch hardness of rare-earth substituted calcium aluminosilicate glasses." Journal of Non-Crystalline Solids: X 1 (2019).

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