Výsledky vyhledávání - "Geoff E. Fair"

Determination of 3-D Alumina Grain Orientation, Size, Shape, and Growth Kinetics from 2-D Data in Nextel™ 610 Fibers

Autor: Geoff E. Fair, Randall S. Hay, Travis Tidball, Kristin A. Keller

Publikováno v: Journal of the American Ceramic Society. 98:2295-2306

Nextel™ 610 alumina fibers were heat-treated at 1100°C–1500°C for 1–100 h in air. Grain size distributions (GSDs) and grain orientation distributions (ODs) with respect to the fiber axis were characterized by analysis of TEM images from longi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e6c9e5669288cf560d0616d0f7e15d60
https://doi.org/10.1111/jace.13572

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Fiber Strength After Grain Growth in Nextel™ 610 Alumina Fiber

Autor: Randall S. Hay, Geoff E. Fair, Travis Tidball

Publikováno v: Journal of the American Ceramic Society. 98:1907-1914

Nextel™ 610 alumina fiber tows were heat-treated at 1100°C–1500°C for 1 to 100 h in air. Tensile strengths and Weibull moduli were measured for 30 filaments after each heat-treatment. 3-D grain size and orientation distributions were described

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6dee4d07097f658f13e89389d097712d
https://doi.org/10.1111/jace.13523

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Lasing of surface-polished polycrystalline Ho: YAG (yttrium aluminum garnet) fiber

Autor: Kathleen Shugart, Dean P. Brown, David E. Zelmon, Hyun Jun Kim, Kristin A. Keller, Triplicane A. Parthasarathy, HeeDong Lee, Geoff E. Fair, Augustine Urbas, Benjamin G. Griffin, K. L. Averett, Sean A. McDaniel, Gary Cook, Randall G. Corns, Randall S. Hay, Ali H Kadhim, Nicholas G. Usechak, Santeri A Potticary, Frank Kenneth Hopkins

Publikováno v: Optics express. 25(6)

A polycrystalline 1.5% Ho: YAG fiber with a diameter of 31 µm was prepared. Surface roughness from grain boundary grooving was reduced by polishing, which decreased the fiber scattering coefficient from 76 msup-1/supto 35 msup-1/sup. Lasing tests we

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1e6df2aee1d2ce44df0098f5e6444f90
https://pubmed.ncbi.nlm.nih.gov/28381016

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Creep mechanisms and microstructure evolution of Nextel™ 610 fiber in air and steam

Autor: Randall S. Hay, Geoff E. Fair, Marina B. Ruggles-Wrenn, C.J. Armani

Publikováno v: Journal of the European Ceramic Society. 34:2413-2426

Creep rates of Nextel™ 610 alumina fibers were measured at 1100 °C and 100–500 MPa in air and steam. Steam increased creep rates and reduced fiber lifetimes. Fiber microstructures were characterized by TEM. The small amounts of grain growth, fib

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7063332b8deffbbb844411d2d85913c4
https://doi.org/10.1016/j.jeurceramsoc.2014.01.032

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Creep of polycrystalline yttrium aluminum garnet (YAG) at elevated temperature in air and in steam

Autor: Geoff E. Fair, Randall S. Hay, C.J. Armani, Marina B. Ruggles-Wrenn, K.A. Keller

Publikováno v: Materials Science and Engineering: A. 589:125-131

Compressive creep of high-purity polycrystalline yttrium aluminum garnet (YAG, Y3Al5O12) was investigated at 1300 °C and 50–200 MPa in air and in steam. Compressive creep behavior of silica-doped polycrystalline YAG (Y3Al5O12–0.14 wt% SiO2) was

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::44415f4628e8fc0fe2d59ce9fccb3f1f
https://doi.org/10.1016/j.msea.2013.09.083

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Creep and microstructure of Nextel™ 720 fiber at elevated temperature in air and in steam

Autor: Marina B. Ruggles-Wrenn, Geoff E. Fair, C.J. Armani, Randall S. Hay

Publikováno v: Acta Materialia. 61:6114-6124

Creep of Nextel™ 720 alumina–mullite fiber tows was investigated at 1100 and 1200 °C for tensile stresses of 100–400 MPa in air and in steam. Fiber microstructures were characterized after creep by transmission electron microscopy. At low stre

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::42281032481eeb2e021f87d305a6f58b
https://doi.org/10.1016/j.actamat.2013.06.053

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Transformation Plasticity in (Gd x Dy1−x )PO4 Fiber Coatings During Fiber Push Out

Autor: Triplicane A. Parthasarathy, J. E. Davis, Pavel Mogilevsky, Emmanuel E. Boakye, Randall S. Hay, Geoff E. Fair

Publikováno v: Journal of the American Ceramic Society. 96:1586-1595

The reduction in fiber push-out stress by transformation plasticity in xenotime rare-earth orthophosphate fiber–matrix interphases was demonstrated. Processing methods for transformable xenotime coatings were explored. For conversion to xenotime du

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::997e22646e40d47dc5d9d337ec928a80
https://doi.org/10.1111/jace.12301

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Creep of Nextel™610 Fiber at 1100°C in Air and in Steam

Autor: Geoff E. Fair, Marina B. Ruggles-Wrenn, Randall S. Hay, C.J. Armani

Publikováno v: International Journal of Applied Ceramic Technology. 10:276-284

Creep of Nextel™610 fibers was investigated at 1100°C and 100–500 MPa in air and in steam. The effect of loading rate on fiber tensile strength was also explored. The presence of steam accelerated creep and reduced fiber lifetimes. Loading rate

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3ad945b49d315d1b1a6bf430f2ccca38
https://doi.org/10.1111/j.1744-7402.2012.02831.x

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