Experimental analysis and modeling of the Knoop hardness of lithium disilicate glass-ceramics containing lithium tantalate as a secondary phase

Anthony V. DeCeanne; Aubrey L. Fry; Collin J. Wilkinson; Marc Dittmer; Christian Ritzberger; Markus Rampf; John C. Mauro

doi:10.1016/j.jnoncrysol.2022.121540

Experimental analysis and modeling of the Knoop hardness of lithium disilicate glass-ceramics containing lithium tantalate as a secondary phase

Anthony V. DeCeanne, Aubrey L. Fry, Collin J. Wilkinson, Marc Dittmer, Christian Ritzberger, Markus Rampf, John C. Mauro

Materials Science and Engineering

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

7 Scopus citations

Abstract

The present study examines the Knoop hardness (H_K) via microindentation of lithium disilicate (LD) glass-ceramics that contain lithium tantalate (LT) as a secondary phase. A 64-sample data set was analyzed to study the relationship between the phase assemblage and the mechanical property. It was found that the H_K was dependent on the phase assemblage in a similar manner as previously acquired phase and color data on the same system. The H_K data was used to train a linear model to predict the heat treatment needed to acquire a desired H_K value. The model allowed us to identify that LT is the best phase to increase the hardness of the sample per XRD count.

Original language	English (US)
Article number	121540
Journal	Journal of Non-Crystalline Solids
Volume	585
DOIs	https://doi.org/10.1016/j.jnoncrysol.2022.121540
State	Published - Jun 1 2022

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Materials Chemistry

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10.1016/j.jnoncrysol.2022.121540

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title = "Experimental analysis and modeling of the Knoop hardness of lithium disilicate glass-ceramics containing lithium tantalate as a secondary phase",

abstract = "The present study examines the Knoop hardness (HK) via microindentation of lithium disilicate (LD) glass-ceramics that contain lithium tantalate (LT) as a secondary phase. A 64-sample data set was analyzed to study the relationship between the phase assemblage and the mechanical property. It was found that the HK was dependent on the phase assemblage in a similar manner as previously acquired phase and color data on the same system. The HK data was used to train a linear model to predict the heat treatment needed to acquire a desired HK value. The model allowed us to identify that LT is the best phase to increase the hardness of the sample per XRD count.",

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T1 - Experimental analysis and modeling of the Knoop hardness of lithium disilicate glass-ceramics containing lithium tantalate as a secondary phase

AU - DeCeanne, Anthony V.

AU - Fry, Aubrey L.

AU - Wilkinson, Collin J.

AU - Dittmer, Marc

AU - Ritzberger, Christian

AU - Rampf, Markus

AU - Mauro, John C.

PY - 2022/6/1

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AB - The present study examines the Knoop hardness (HK) via microindentation of lithium disilicate (LD) glass-ceramics that contain lithium tantalate (LT) as a secondary phase. A 64-sample data set was analyzed to study the relationship between the phase assemblage and the mechanical property. It was found that the HK was dependent on the phase assemblage in a similar manner as previously acquired phase and color data on the same system. The HK data was used to train a linear model to predict the heat treatment needed to acquire a desired HK value. The model allowed us to identify that LT is the best phase to increase the hardness of the sample per XRD count.

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Experimental analysis and modeling of the Knoop hardness of lithium disilicate glass-ceramics containing lithium tantalate as a secondary phase

Abstract

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