Interface modification for increased fracture toughness in reaction-formed yttrium aluminum garnet/alumina eutectic composites

Luke N. Brewer; Derrick P. Endler; Shani Austin; Vinayak P. Dravid; Joseph M. Collins

doi:10.1557/JMR.1999.0529

Interface modification for increased fracture toughness in reaction-formed yttrium aluminum garnet/alumina eutectic composites

Luke N. Brewer, Derrick P. Endler, Shani Austin, Vinayak P. Dravid, Joseph M. Collins

Materials Science and Engineering

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

12 Scopus citations

Abstract

The validity of controlling interfacial toughness in reaction-formed composites was explored using solid-state reaction processing and microanalysis techniques. A variety of rare-earth oxides was added to a yttrium aluminum garnet (YAG)/alumina powder mixture and then melted in air. Some melts retained the crystallography and microstructure of the pure, binary YAG-alumina eutectic. Using scanning transmission electron microscopy in conjunction with energy dispersive X-ray spectroscopy, rare-earth ions were observed both to segregate to the YAG/alumina interface and to form a third phase. Some evidence of increased crack deflection at these interfaces was observed via indentation fracture.

Original language	English (US)
Pages (from-to)	3907-3912
Number of pages	6
Journal	Journal of Materials Research
Volume	14
Issue number	10
DOIs	https://doi.org/10.1557/JMR.1999.0529
State	Published - Oct 1999

Funding

This work was generously supported by the following sources: AFOSR F49620-96-C-0047 (J.M.C.), NSF-DMR 9528488 (L.N.B., V.P.D.), DOD-NDSEG (I.N.B.), and NSF-DMR-REU/MRI 9632472 (D.E., S.A.).

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1557/JMR.1999.0529

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title = "Interface modification for increased fracture toughness in reaction-formed yttrium aluminum garnet/alumina eutectic composites",

abstract = "The validity of controlling interfacial toughness in reaction-formed composites was explored using solid-state reaction processing and microanalysis techniques. A variety of rare-earth oxides was added to a yttrium aluminum garnet (YAG)/alumina powder mixture and then melted in air. Some melts retained the crystallography and microstructure of the pure, binary YAG-alumina eutectic. Using scanning transmission electron microscopy in conjunction with energy dispersive X-ray spectroscopy, rare-earth ions were observed both to segregate to the YAG/alumina interface and to form a third phase. Some evidence of increased crack deflection at these interfaces was observed via indentation fracture.",

author = "Brewer, {Luke N.} and Endler, {Derrick P.} and Shani Austin and Dravid, {Vinayak P.} and Collins, {Joseph M.}",

note = "Funding Information: This work was generously supported by the following sources: AFOSR F49620-96-C-0047 (J.M.C.), NSF-DMR 9528488 (L.N.B., V.P.D.), DOD-NDSEG (I.N.B.), and NSF-DMR-REU/MRI 9632472 (D.E., S.A.).",

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AU - Brewer, Luke N.

AU - Endler, Derrick P.

AU - Austin, Shani

AU - Dravid, Vinayak P.

AU - Collins, Joseph M.

N1 - Funding Information: This work was generously supported by the following sources: AFOSR F49620-96-C-0047 (J.M.C.), NSF-DMR 9528488 (L.N.B., V.P.D.), DOD-NDSEG (I.N.B.), and NSF-DMR-REU/MRI 9632472 (D.E., S.A.).

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N2 - The validity of controlling interfacial toughness in reaction-formed composites was explored using solid-state reaction processing and microanalysis techniques. A variety of rare-earth oxides was added to a yttrium aluminum garnet (YAG)/alumina powder mixture and then melted in air. Some melts retained the crystallography and microstructure of the pure, binary YAG-alumina eutectic. Using scanning transmission electron microscopy in conjunction with energy dispersive X-ray spectroscopy, rare-earth ions were observed both to segregate to the YAG/alumina interface and to form a third phase. Some evidence of increased crack deflection at these interfaces was observed via indentation fracture.

AB - The validity of controlling interfacial toughness in reaction-formed composites was explored using solid-state reaction processing and microanalysis techniques. A variety of rare-earth oxides was added to a yttrium aluminum garnet (YAG)/alumina powder mixture and then melted in air. Some melts retained the crystallography and microstructure of the pure, binary YAG-alumina eutectic. Using scanning transmission electron microscopy in conjunction with energy dispersive X-ray spectroscopy, rare-earth ions were observed both to segregate to the YAG/alumina interface and to form a third phase. Some evidence of increased crack deflection at these interfaces was observed via indentation fracture.

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Interface modification for increased fracture toughness in reaction-formed yttrium aluminum garnet/alumina eutectic composites

Abstract

Funding

ASJC Scopus subject areas

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