Crystallization-Induced Phason Relaxation in Icosahedral Al-Pd-Mn Alloys

An Pang Tsai; Akihisa Inoue; Tsuyoshi Masumoto; Ho Sou Chen

doi:10.1143/JJAP.31.L419

Crystallization-Induced Phason Relaxation in Icosahedral Al-Pd-Mn Alloys

An Pang Tsai, Akihisa Inoue, Tsuyoshi Masumoto, Ho Sou Chen

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

4 Citations (Scopus)

Abstract

A melt-quenched icosahedral (i-) phase with a composition such as Al₇₄Pd₁₇Mn₉ close to but is deviated slightly from the ideal composition (Al₇₀Pd₂₀Mn₁₀) of stable i-AlPdMn alloy, containing significant phason strains. It transforms to a phason-free i-phase accompanied by crystallization upon annealing at sufficiently high temperature. The composition of the i-grains approaches the ideal after the transformation. Such phason strain relaxation was not observed in the melt-quenched Al₇₅Pd₁₅Mn₁₀i-phase, for which composition considerably deviates from the ideal composition; crystallization occurs without redistribution in the composition. It was suggested that a highly stable i-phase occurs in the ground state when it has the ideal composition.

Original language	English
Pages (from-to)	L419-L422
Journal	Japanese journal of applied physics
Volume	31
Issue number	4
DOIs	https://doi.org/10.1143/JJAP.31.L419
Publication status	Published - 1992 Apr
Externally published	Yes

Keywords

Aluminum-palladium-manganese
Crystallization
Icosahedral phase
Ideal composition
Phason relaxation

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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10.1143/JJAP.31.L419

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title = "Crystallization-Induced Phason Relaxation in Icosahedral Al-Pd-Mn Alloys",

abstract = "A melt-quenched icosahedral (i-) phase with a composition such as Al74Pd17Mn9 close to but is deviated slightly from the ideal composition (Al70Pd20Mn10) of stable i-AlPdMn alloy, containing significant phason strains. It transforms to a phason-free i-phase accompanied by crystallization upon annealing at sufficiently high temperature. The composition of the i-grains approaches the ideal after the transformation. Such phason strain relaxation was not observed in the melt-quenched Al75Pd15Mn10i-phase, for which composition considerably deviates from the ideal composition; crystallization occurs without redistribution in the composition. It was suggested that a highly stable i-phase occurs in the ground state when it has the ideal composition.",

keywords = "Aluminum-palladium-manganese, Crystallization, Icosahedral phase, Ideal composition, Phason relaxation",

author = "Tsai, {An Pang} and Akihisa Inoue and Tsuyoshi Masumoto and Chen, {Ho Sou}",

year = "1992",

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T1 - Crystallization-Induced Phason Relaxation in Icosahedral Al-Pd-Mn Alloys

AU - Tsai, An Pang

AU - Inoue, Akihisa

AU - Masumoto, Tsuyoshi

AU - Chen, Ho Sou

PY - 1992/4

Y1 - 1992/4

N2 - A melt-quenched icosahedral (i-) phase with a composition such as Al74Pd17Mn9 close to but is deviated slightly from the ideal composition (Al70Pd20Mn10) of stable i-AlPdMn alloy, containing significant phason strains. It transforms to a phason-free i-phase accompanied by crystallization upon annealing at sufficiently high temperature. The composition of the i-grains approaches the ideal after the transformation. Such phason strain relaxation was not observed in the melt-quenched Al75Pd15Mn10i-phase, for which composition considerably deviates from the ideal composition; crystallization occurs without redistribution in the composition. It was suggested that a highly stable i-phase occurs in the ground state when it has the ideal composition.

AB - A melt-quenched icosahedral (i-) phase with a composition such as Al74Pd17Mn9 close to but is deviated slightly from the ideal composition (Al70Pd20Mn10) of stable i-AlPdMn alloy, containing significant phason strains. It transforms to a phason-free i-phase accompanied by crystallization upon annealing at sufficiently high temperature. The composition of the i-grains approaches the ideal after the transformation. Such phason strain relaxation was not observed in the melt-quenched Al75Pd15Mn10i-phase, for which composition considerably deviates from the ideal composition; crystallization occurs without redistribution in the composition. It was suggested that a highly stable i-phase occurs in the ground state when it has the ideal composition.

KW - Aluminum-palladium-manganese

KW - Crystallization

KW - Icosahedral phase

KW - Ideal composition

KW - Phason relaxation

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ER -

Crystallization-Induced Phason Relaxation in Icosahedral Al-Pd-Mn Alloys

Abstract

Keywords

ASJC Scopus subject areas

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