Investigation of indentation fracture toughness (KIC) and weibull parameters of 0.25Li2O.2SiO2-0.75BaO.2SiO2 glass-ceramic

B. Ertuǧ; B. Nilgün Çetiner; H. Gökçe; Z. Engin Erkmen; M. Lütfi Öveçoǧlu

doi:10.1515/amm-2017-0294

Investigation of indentation fracture toughness (K_IC) and weibull parameters of 0.25Li₂O.2SiO₂-0.75BaO.2SiO₂ glass-ceramic

B. Ertuǧ^*, B. Nilgün Çetiner, H. Gökçe, Z. Engin Erkmen, M. Lütfi Öveçoǧlu

^*Corresponding author for this work

Department of Metallurgical and Materials Engineering

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

1 Citation (Scopus)

Abstract

In the present study, mechanical properties of 0.25Li₂O.2SiO₂-0.75BaO.2SiO₂ glass-ceramic were investigated. The trans-formations' temperatures were determined by DTA instrument. The optimum nucleation temperature was found to be 540°C. This suggested the crystallization temperatures as 675, 720 and 800°C. After carrying out crystallization heat treatments, Vickers indentation test was applied. In order to determine the indentation fracture toughness (K_IC), crack half-length 'c' of the samples was measured. To calculate K_IC, Young's modulus, E and the measured hardness, H_v were used. Using K_IC and probability of fracture 'P', ln ln[1/(1 - P)] - ln K_IC graph was drawn based on the Weibull distribution equation. Consequently, Weibull modulus, 'm' and scale parameter, 'K₀' were determined and compared with each other.

Original language	English
Pages (from-to)	1963-1968
Number of pages	6
Journal	Archives of Metallurgy and Materials
Volume	62
Issue number	4
DOIs	https://doi.org/10.1515/amm-2017-0294
Publication status	Published - 1 Dec 2017

Bibliographical note

Publisher Copyright:
© 2017 B. Ertuǧ et al., published by De Gruyter Open 2017.

Keywords

Hardness
Indentation Fracture Toughness
Lithium barium silicate glass-ceramic
Statistical Analysis
Weibull modulus

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10.1515/amm-2017-0294

Cite this

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title = "Investigation of indentation fracture toughness (KIC) and weibull parameters of 0.25Li2O.2SiO2-0.75BaO.2SiO2 glass-ceramic",

abstract = "In the present study, mechanical properties of 0.25Li2O.2SiO2-0.75BaO.2SiO2 glass-ceramic were investigated. The trans-formations' temperatures were determined by DTA instrument. The optimum nucleation temperature was found to be 540°C. This suggested the crystallization temperatures as 675, 720 and 800°C. After carrying out crystallization heat treatments, Vickers indentation test was applied. In order to determine the indentation fracture toughness (KIC), crack half-length 'c' of the samples was measured. To calculate KIC, Young's modulus, E and the measured hardness, Hv were used. Using KIC and probability of fracture 'P', ln ln[1/(1 - P)] - ln KIC graph was drawn based on the Weibull distribution equation. Consequently, Weibull modulus, 'm' and scale parameter, 'K0' were determined and compared with each other.",

keywords = "Hardness, Indentation Fracture Toughness, Lithium barium silicate glass-ceramic, Statistical Analysis, Weibull modulus",

author = "B. Ertuǧ and {\c C}etiner, {B. Nilg{\"u}n} and H. G{\"o}k{\c c}e and Erkmen, {Z. Engin} and {\"O}ve{\c c}oǧlu, {M. L{\"u}tfi}",

note = "Publisher Copyright: {\textcopyright} 2017 B. Ertuǧ et al., published by De Gruyter Open 2017.",

year = "2017",

month = dec,

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T1 - Investigation of indentation fracture toughness (KIC) and weibull parameters of 0.25Li2O.2SiO2-0.75BaO.2SiO2 glass-ceramic

AU - Ertuǧ, B.

AU - Çetiner, B. Nilgün

AU - Gökçe, H.

AU - Erkmen, Z. Engin

AU - Öveçoǧlu, M. Lütfi

PY - 2017/12/1

Y1 - 2017/12/1

N2 - In the present study, mechanical properties of 0.25Li2O.2SiO2-0.75BaO.2SiO2 glass-ceramic were investigated. The trans-formations' temperatures were determined by DTA instrument. The optimum nucleation temperature was found to be 540°C. This suggested the crystallization temperatures as 675, 720 and 800°C. After carrying out crystallization heat treatments, Vickers indentation test was applied. In order to determine the indentation fracture toughness (KIC), crack half-length 'c' of the samples was measured. To calculate KIC, Young's modulus, E and the measured hardness, Hv were used. Using KIC and probability of fracture 'P', ln ln[1/(1 - P)] - ln KIC graph was drawn based on the Weibull distribution equation. Consequently, Weibull modulus, 'm' and scale parameter, 'K0' were determined and compared with each other.

AB - In the present study, mechanical properties of 0.25Li2O.2SiO2-0.75BaO.2SiO2 glass-ceramic were investigated. The trans-formations' temperatures were determined by DTA instrument. The optimum nucleation temperature was found to be 540°C. This suggested the crystallization temperatures as 675, 720 and 800°C. After carrying out crystallization heat treatments, Vickers indentation test was applied. In order to determine the indentation fracture toughness (KIC), crack half-length 'c' of the samples was measured. To calculate KIC, Young's modulus, E and the measured hardness, Hv were used. Using KIC and probability of fracture 'P', ln ln[1/(1 - P)] - ln KIC graph was drawn based on the Weibull distribution equation. Consequently, Weibull modulus, 'm' and scale parameter, 'K0' were determined and compared with each other.

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KW - Indentation Fracture Toughness

KW - Lithium barium silicate glass-ceramic

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KW - Weibull modulus

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