Search Results - "Seward, Gareth"

A defect-resistant Co–Ni superalloy for 3D printing by Murray, Sean P., Pusch, Kira M., Polonsky, Andrew T., Torbet, Chris J., Seward, Gareth G. E., Zhou, Ning, Forsik, Stéphane A. J., Nandwana, Peeyush, Kirka, Michael M., Dehoff, Ryan R., Slye, William E., Pollock, Tresa M.

“…Additive manufacturing promises a major transformation of the production of high economic value metallic materials, enabling innovative, geometrically complex…”
Get full text

Influence of Yb:Hf Ratio on Ytterbium Hafnate/Molten Silicate (CMAS) Reactivity by Poerschke, David L., Seward, Gareth G. E., Levi, Carlos G.

“…This study investigated the influence of YbO1.5 concentration on the reactivity between YbO1.5–HfO2 thermal barrier coating (TBC) materials and silicate melts…”
Get full text

Interpreting titanite U–Pb dates and Zr thermobarometry in high-grade rocks: empirical constraints on elemental diffusivities of Pb, Al, Fe, Zr, Nb, and Ce by Holder, Robert M., Hacker, Bradley R., Seward, Gareth G. E., Kylander-Clark, Andrew R. C.

“…Length scales of compositional heterogeneity in titanite from 750 to 1000 °C metamorphic rocks from southern Madagascar were measured to provide empirical…”
Get full text

Dissolution and diffusion kinetics of yttria-stabilized zirconia into molten silicates by Holgate, Collin S., Seward, Gareth G.E., Ericks, Andrew R., Poerschke, David L., Levi, Carlos G.

“…•Experimental approach based on 1D diffusion couples betweenYSZand silicate melts.•YSZdissolves slowly; the relevant kinetics depend strongly on melt…”
Get full text

Linking titanite U–Pb dates to coupled deformation and dissolution–reprecipitation by Moser, Amy C., Hacker, Bradley R., Gehrels, George E., Seward, Gareth G. E., Kylander-Clark, Andrew R. C., Garber, Joshua M.

“…Titanite U–Pb geochronology is a promising tool to date high-temperature tectonic processes, but the extent to and mechanisms by which recrystallization resets…”
Get full text

Stability and CMAS Resistance of Ytterbium-Silicate/Hafnate EBCs/TBC for SiC Composites by Poerschke, David L., Hass, Derek D., Eustis, Susie, Seward, Gareth G.E., Van Sluytman, Jason S., Levi, Carlos G.

“…Multilayer ytterbium‐hafnate/silicate coatings deposited by directed vapor deposition and designed to protect SiC‐based ceramic matrix composites were assessed…”
Get full text

Apatites for destruction: Reference apatites from Morocco and Brazil for U-Pb petrochronology and Nd and Sr isotope geochemistry by Apen, Francisco E., Wall, Corey J., Cottle, John M., Schmitz, Mark D., Kylander-Clark, Andrew R.C., Seward, Gareth G.E.

“…In situ apatite U-Pb petrochronology and Sr-Nd isotope geochemistry requires well-characterized and matrix-matched references materials (RMs), yet only a few…”
Get full text

Garnet zoning patterns record multiple processes of chemical transfer during subduction by George, Freya R., Viete, Daniel R., Ávila, Janaína, Seward, Gareth G.E., Guice, George L., Allen, Mark B., Harrower, Michael J.

“…•Fine-scale element and oxygen isotope zoning in subduction garnets is decoupled.•There is no evidence to suggest that buffering fluids drive elemental…”
Get full text

Calcium-Magnesium Alumino-Silicate Interaction with Yttrium Monosilicate Environmental Barrier Coatings by Grant, Kendra M., Krämer, Stephan, Seward, Gareth G. E., Levi, Carlos G.

“…The interaction of molten calcium–magnesium alumino‐silicate (CMAS) with yttrium monosilicate (YMS), a candidate environmental barrier coating (EBC) for…”
Get full text

Titanite Petrochronology Records Secular Temperature and Fluid Evolution During Ductile Deformation: An Example From Late Cretaceous Shear Zones in the Eastern Transverse Ranges by Moser, Amy C., Lusk, Alexander D., Attia, Snir, Garber, Joshua M., Seward, Gareth G. E., Kylander‐Clark, Andrew R. C.

“…Quantifying the timing and conditions of ductile deformation is essential for quantitative models of lithospheric deformation. Yet, directly constraining these…”
Get full text

Effects of Impurities on the Thermal and Electrical Transport Properties of Cubic Boron Arsenide by Chen, Xi, Li, Chunhua, Xu, Youming, Dolocan, Andrei, Seward, Gareth, Van Roekeghem, Ambroise, Tian, Fei, Xing, Jie, Guo, Shucheng, Ni, Ni, Ren, Zhifeng, Zhou, Jianshi, Mingo, Natalio, Broido, David, Shi, Li

“…Cubic boron arsenide (BAs) is a promising compound semiconductor for thermal management applications due to its high thermal conductivity, exceeding 1000 W m–1…”
Get full text

Seismic anisotropy of the crust: electron-backscatter diffraction measurements from the Basin and Range by Erdman, Monica E., Hacker, Bradley R., Zandt, George, Seward, Gareth

“…Crystal preferred orientations were measured in a suite of rocks from three locations in the Basin and Range using electron-backscatter diffraction…”
Get full text

Extreme isotopic heterogeneity in Samoan clinopyroxenes constrains sediment recycling by Adams, Jenna V., Jackson, Matthew G., Spera, Frank J., Price, Allison A., Byerly, Benjamin L., Seward, Gareth, Cottle, John M.

“…Lavas erupted at hotspot volcanoes provide evidence of mantle heterogeneity. Samoan Island lavas with high 87 Sr/ 86 Sr (>0.706) typify a mantle source…”
Get full text

Rapid Microwave Preparation of Thermoelectric TiNiSn and TiCoSb Half-Heusler Compounds by Birkel, Christina S, Zeier, Wolfgang G, Douglas, Jason E, Lettiere, Bethany R, Mills, Carolyn E, Seward, Gareth, Birkel, Alexander, Snedaker, Matthew L, Zhang, Yichi, Snyder, G. Jeffrey, Pollock, Tresa M, Seshadri, Ram, Stucky, Galen D

“…The 18-electron ternary intermetallic systems TiNiSn and TiCoSb are promising for applications as high-temperature thermoelectrics and comprise earth-abundant,…”
Get full text

Metamorphic records of multiple seismic cycles during subduction by Viete, Daniel R, Hacker, Bradley R, Allen, Mark B, Seward, Gareth G E, Tobin, Mark J, Kelley, Chris S, Cinque, Gianfelice, Duckworth, Andrew R

“…Large earthquakes occur in rocks undergoing high-pressure/low-temperature metamorphism during subduction. Rhythmic major-element zoning in garnet is a common…”
Get full text

Rapid Microwave Preparation and Composition Tuning of the High-Performance Magnetocalorics (Mn,Fe)2(P,Si) by Grebenkemper, Jason H, Bocarsly, Joshua D, Levin, Emily E, Seward, Gareth, Heikes, Colin, Brown, Craig, Misra, Sumohan, Seeler, Fabian, Schierle-Arndt, Kerstin, Wilson, Stephen D, Seshadri, Ram

“…Rapid preparation utilizing assisted microwave heating permits significantly shorter preparation times for magnetocaloric compounds in the (Mn,Fe)2(P,Si)…”
Get full text

Seismic signatures of a hydrated mantle wedge from antigorite crystal-preferred orientation (CPO) by Brownlee, Sarah J., Hacker, Bradley R., Harlow, George E., Seward, Gareth

“…We report electron backscatter diffraction (EBSD) measurements of antigorite crystal preferred orientations (CPOs) from 7 samples of antigorite schist from…”
Get full text

Predicted velocity and density structure of the exhuming Papua New Guinea ultrahigh-pressure terrane by Brownlee, Sarah J., Hacker, Bradley R., Salisbury, Matthew, Seward, Gareth, Little, Timothy A., Baldwin, Suzanne L., Abers, Geoffrey A.

“…New electron backscatter diffraction measurements show that the Papua New Guinea (PNG) ultrahigh‐pressure (UHP) terrane is dominated by rocks with weakly…”
Get full text

Localized ductile shear below the seismogenic zone: Structural analysis of an exhumed strike-slip fault, Austrian Alps by Cole, Joshua, Hacker, Bradley, Ratschbacher, Lothar, Dolan, James, Seward, Gareth, Frost, Erik, Frank, Wolfgang

“…The Miocene Salzachtal‐Ennstal‐Mariazell‐Puchberg (SEMP) strike‐slip fault in Austria allows study of the internal structure of a fault zone from the near…”
Get full text

Middle crustal ductile deformation patterns in southern Tibet: Insights from vorticity studies in Mabja Dome by Langille, Jackie, Lee, Jeffrey, Hacker, Bradley, Seward, Gareth

“…Kinematic, kinematic vorticity ( W m), and deformation-temperature analyses were performed to test the hypothesis that mid-crustal rocks exposed in Mabja Dome,…”
Get full text