In situ Raman indentation of β-eucryptite: Characterization of the pressure-induced phase transformation

Timothy Jochum; Ivar E. Reimanis; Michael J. Lance; Edwin R. Fuller

doi:10.1111/j.1551-2916.2009.02994.x

In situ Raman indentation of β-eucryptite: Characterization of the pressure-induced phase transformation

Timothy Jochum, Ivar E. Reimanis, Michael J. Lance, Edwin R. Fuller

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

16 Scopus citations

Abstract

A pressure-induced phase transformation in the lithium aluminum silicate β-eucryptite was studied with in situ Raman spectroscopy. Dense β-eucryptite composites were made via powder synthesis followed by sintering. The specimens were then subjected to diamond indentation up to applied contact stresses of about 8 GPa, while collecting Raman spectra. The appearance of a Raman peak (∼520 cm ^-1) at a contact stress of about 3 GPa likely corresponds to the reversible phase transformation of β-eucryptite to the orthorhombic phase ε-eucryptite. Loading and unloading in situ Raman indentation experiments are discussed with regards to this transformation.

Original language	English
Pages (from-to)	857-863
Number of pages	7
Journal	Journal of the American Ceramic Society
Volume	92
Issue number	4
DOIs	https://doi.org/10.1111/j.1551-2916.2009.02994.x
State	Published - Apr 2009
Externally published	Yes

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10.1111/j.1551-2916.2009.02994.x

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title = "In situ Raman indentation of β-eucryptite: Characterization of the pressure-induced phase transformation",

abstract = "A pressure-induced phase transformation in the lithium aluminum silicate β-eucryptite was studied with in situ Raman spectroscopy. Dense β-eucryptite composites were made via powder synthesis followed by sintering. The specimens were then subjected to diamond indentation up to applied contact stresses of about 8 GPa, while collecting Raman spectra. The appearance of a Raman peak (∼520 cm -1) at a contact stress of about 3 GPa likely corresponds to the reversible phase transformation of β-eucryptite to the orthorhombic phase ε-eucryptite. Loading and unloading in situ Raman indentation experiments are discussed with regards to this transformation.",

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AU - Reimanis, Ivar E.

AU - Lance, Michael J.

AU - Fuller, Edwin R.

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AB - A pressure-induced phase transformation in the lithium aluminum silicate β-eucryptite was studied with in situ Raman spectroscopy. Dense β-eucryptite composites were made via powder synthesis followed by sintering. The specimens were then subjected to diamond indentation up to applied contact stresses of about 8 GPa, while collecting Raman spectra. The appearance of a Raman peak (∼520 cm -1) at a contact stress of about 3 GPa likely corresponds to the reversible phase transformation of β-eucryptite to the orthorhombic phase ε-eucryptite. Loading and unloading in situ Raman indentation experiments are discussed with regards to this transformation.

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JO - Journal of the American Ceramic Society

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In situ Raman indentation of β-eucryptite: Characterization of the pressure-induced phase transformation

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