Mechanisms of microstructural deformation governing Vickers hardness in phase-separated calcium aluminosilicate glasses

Nicholas L. Clark; Shih Yi Chuang; John C. Mauro

doi:10.1111/jace.19112

Mechanisms of microstructural deformation governing Vickers hardness in phase-separated calcium aluminosilicate glasses

Nicholas L. Clark, Shih Yi Chuang, John C. Mauro

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

The impact of microstructure on hardness in phase-separated calcium aluminosilicate glasses is investigated. Changes in hardness are governed by microstructure deformations that occur during indentation. Phase separation leads to decreased hardness due to the incongruent yielding of the droplet and matrix phases. Moreover, the deformation of microstructures possessing dilute, spherical droplets did not have a significant impact on hardness. Microstructures characterized by concentrated, acicular droplets were found to deform through a process of droplet coalescence. This process absorbs additional energy during yielding and results in glasses that deform through droplet coalescence possessing improved hardness.

Original language	English (US)
Pages (from-to)	4605-4616
Number of pages	12
Journal	Journal of the American Ceramic Society
Volume	106
Issue number	8
DOIs	https://doi.org/10.1111/jace.19112
State	Published - Aug 2023

All Science Journal Classification (ASJC) codes

Ceramics and Composites
Materials Chemistry

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10.1111/jace.19112

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title = "Mechanisms of microstructural deformation governing Vickers hardness in phase-separated calcium aluminosilicate glasses",

abstract = "The impact of microstructure on hardness in phase-separated calcium aluminosilicate glasses is investigated. Changes in hardness are governed by microstructure deformations that occur during indentation. Phase separation leads to decreased hardness due to the incongruent yielding of the droplet and matrix phases. Moreover, the deformation of microstructures possessing dilute, spherical droplets did not have a significant impact on hardness. Microstructures characterized by concentrated, acicular droplets were found to deform through a process of droplet coalescence. This process absorbs additional energy during yielding and results in glasses that deform through droplet coalescence possessing improved hardness.",

author = "Clark, {Nicholas L.} and Chuang, {Shih Yi} and Mauro, {John C.}",

note = "Funding Information: This material is based upon work supported by the National Science Foundation under grant number 1762275. The authors are grateful to Dr. Jane Cook and Dr. Seong Kim for valuable discussions, and to Julie Andrews and Wes Auker for assistance with data collection. Publisher Copyright: {\textcopyright} 2023 The Authors. Journal of the American Ceramic Society published by Wiley Periodicals LLC on behalf of American Ceramic Society.",

year = "2023",

month = aug,

doi = "10.1111/jace.19112",

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pages = "4605--4616",

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AU - Clark, Nicholas L.

AU - Chuang, Shih Yi

AU - Mauro, John C.

N1 - Funding Information: This material is based upon work supported by the National Science Foundation under grant number 1762275. The authors are grateful to Dr. Jane Cook and Dr. Seong Kim for valuable discussions, and to Julie Andrews and Wes Auker for assistance with data collection. Publisher Copyright: © 2023 The Authors. Journal of the American Ceramic Society published by Wiley Periodicals LLC on behalf of American Ceramic Society.

PY - 2023/8

Y1 - 2023/8

N2 - The impact of microstructure on hardness in phase-separated calcium aluminosilicate glasses is investigated. Changes in hardness are governed by microstructure deformations that occur during indentation. Phase separation leads to decreased hardness due to the incongruent yielding of the droplet and matrix phases. Moreover, the deformation of microstructures possessing dilute, spherical droplets did not have a significant impact on hardness. Microstructures characterized by concentrated, acicular droplets were found to deform through a process of droplet coalescence. This process absorbs additional energy during yielding and results in glasses that deform through droplet coalescence possessing improved hardness.

AB - The impact of microstructure on hardness in phase-separated calcium aluminosilicate glasses is investigated. Changes in hardness are governed by microstructure deformations that occur during indentation. Phase separation leads to decreased hardness due to the incongruent yielding of the droplet and matrix phases. Moreover, the deformation of microstructures possessing dilute, spherical droplets did not have a significant impact on hardness. Microstructures characterized by concentrated, acicular droplets were found to deform through a process of droplet coalescence. This process absorbs additional energy during yielding and results in glasses that deform through droplet coalescence possessing improved hardness.

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Mechanisms of microstructural deformation governing Vickers hardness in phase-separated calcium aluminosilicate glasses

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