Contrasting viscoelastic behavior of melt-free and melt-bearing olivine: Implications for the nature of grain-boundary sliding

Ian Jackson; Ulrich H. Faul; John D.Fitz Gerald; S. J.S. Morris

doi:10.1016/j.msea.2006.01.136

Contrasting viscoelastic behavior of melt-free and melt-bearing olivine: Implications for the nature of grain-boundary sliding

Ian Jackson^*
, Ulrich H. Faul
, John D.Fitz Gerald
, S. J.S. Morris

^*Corresponding author for this work

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

50 Citations (Scopus)

Abstract

Melt-free and basaltic (complex alumino-silicate) melt-bearing specimens of fine-grained polycrystalline olivine (Mg_0.9Fe_0.1)₂SiO₄, tested at high temperature and low frequency in torsional forced oscillation and microcreep, display markedly different behavior. For the melt-bearing materials, superimposed upon the high-temperature background is a dissipation peak whose height varies systematically with melt fraction that is attributed to elastically accommodated grain-boundary sliding facilitated by the rounding of grain edges at melt-filled triple junctions. The melt-free materials display only the high-temperature background dissipation associated with transient diffusional creep-elastically accommodated sliding evidently being inhibited by their tight grain-edge intersections. These and similar observations for other ceramic materials require that the classic theory of grain-boundary sliding be revisited and suitably modified.

Original language	English
Pages (from-to)	170-174
Number of pages	5
Journal	Materials Science and Engineering: A
Volume	442
Issue number	1-2 SPEC. ISS.
DOIs	https://doi.org/10.1016/j.msea.2006.01.136
Publication status	Published - 20 Dec 2006

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@article{21a889f7537949c4996da79ae991902e,

title = "Contrasting viscoelastic behavior of melt-free and melt-bearing olivine: Implications for the nature of grain-boundary sliding",

abstract = "Melt-free and basaltic (complex alumino-silicate) melt-bearing specimens of fine-grained polycrystalline olivine (Mg0.9Fe0.1)2SiO4, tested at high temperature and low frequency in torsional forced oscillation and microcreep, display markedly different behavior. For the melt-bearing materials, superimposed upon the high-temperature background is a dissipation peak whose height varies systematically with melt fraction that is attributed to elastically accommodated grain-boundary sliding facilitated by the rounding of grain edges at melt-filled triple junctions. The melt-free materials display only the high-temperature background dissipation associated with transient diffusional creep-elastically accommodated sliding evidently being inhibited by their tight grain-edge intersections. These and similar observations for other ceramic materials require that the classic theory of grain-boundary sliding be revisited and suitably modified.",

keywords = "Grain boundaries, Grain-boundary sliding, Mechanical spectroscopy, Partial melting",

author = "Ian Jackson and Faul, \{Ulrich H.\} and Gerald, \{John D.Fitz\} and Morris, \{S. J.S.\}",

year = "2006",

month = dec,

day = "20",

doi = "10.1016/j.msea.2006.01.136",

language = "English",

volume = "442",

pages = "170--174",

journal = "Materials Science and Engineering: A",

issn = "0921-5093",

publisher = "Elsevier Ltd.",

number = "1-2 SPEC. ISS.",

}

TY - JOUR

T1 - Contrasting viscoelastic behavior of melt-free and melt-bearing olivine

T2 - Implications for the nature of grain-boundary sliding

AU - Jackson, Ian

AU - Faul, Ulrich H.

AU - Gerald, John D.Fitz

AU - Morris, S. J.S.

PY - 2006/12/20

Y1 - 2006/12/20

N2 - Melt-free and basaltic (complex alumino-silicate) melt-bearing specimens of fine-grained polycrystalline olivine (Mg0.9Fe0.1)2SiO4, tested at high temperature and low frequency in torsional forced oscillation and microcreep, display markedly different behavior. For the melt-bearing materials, superimposed upon the high-temperature background is a dissipation peak whose height varies systematically with melt fraction that is attributed to elastically accommodated grain-boundary sliding facilitated by the rounding of grain edges at melt-filled triple junctions. The melt-free materials display only the high-temperature background dissipation associated with transient diffusional creep-elastically accommodated sliding evidently being inhibited by their tight grain-edge intersections. These and similar observations for other ceramic materials require that the classic theory of grain-boundary sliding be revisited and suitably modified.

AB - Melt-free and basaltic (complex alumino-silicate) melt-bearing specimens of fine-grained polycrystalline olivine (Mg0.9Fe0.1)2SiO4, tested at high temperature and low frequency in torsional forced oscillation and microcreep, display markedly different behavior. For the melt-bearing materials, superimposed upon the high-temperature background is a dissipation peak whose height varies systematically with melt fraction that is attributed to elastically accommodated grain-boundary sliding facilitated by the rounding of grain edges at melt-filled triple junctions. The melt-free materials display only the high-temperature background dissipation associated with transient diffusional creep-elastically accommodated sliding evidently being inhibited by their tight grain-edge intersections. These and similar observations for other ceramic materials require that the classic theory of grain-boundary sliding be revisited and suitably modified.

KW - Grain boundaries

KW - Grain-boundary sliding

KW - Mechanical spectroscopy

KW - Partial melting

UR - https://www.scopus.com/pages/publications/33751118555

U2 - 10.1016/j.msea.2006.01.136

DO - 10.1016/j.msea.2006.01.136

M3 - Article

SN - 0921-5093

VL - 442

SP - 170

EP - 174

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

IS - 1-2 SPEC. ISS.

ER -

Contrasting viscoelastic behavior of melt-free and melt-bearing olivine: Implications for the nature of grain-boundary sliding

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