Zobrazeno 1 - 10
of 35
pro vyhledávání: '"Jeffrey H. Nguyen"'
Autor:
Minta Akin, W. Patrick Ambrose, Jeffrey H. Nguyen, Ricky Chau, Neil C. Holmes, Martha A. Beckwith, Paul D. Asimow, O. V. Fat'yanov
We used several variations of the shock compression method to measure the longitudinal sound velocity of shocked tantalum over the pressure range 37–363 GPa with a typical uncertainty of 1.0 %. These data are consistent with Ta remaining in the bcc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5a108ebc80cda540fe42ba832fac098a
https://resolver.caltech.edu/CaltechAUTHORS:20190502-102042764
https://resolver.caltech.edu/CaltechAUTHORS:20190502-102042764
Autor:
Elida R. White, Paul D. Asimow, Waldi O. Greene, Jonathan Lind, Brian J. Fix, Cheng K. Saw, Jeffery J. Haslam, Jeffrey H. Nguyen, Minta Akin, James P. Kelly
Publikováno v:
Journal of Applied Physics. 125:145902
Graded density impactors (GDIs) are used to dynamically compress materials to extreme conditions. Two modifications to a previously developed Mg-Cu-W GDI are made in this work before using it in a dynamic compression experiment: Mg is replaced with A
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::040dc9268a0d083bb6c48216359690aa
https://doi.org/10.1063/1.5055398
https://doi.org/10.1063/1.5055398
Publikováno v:
Materials Science and Engineering: A. 479:300-305
A methodology is described for fabrication of compositionally graded metal/polymer structures to be used as light-gas gun impactors. Mixtures of Mg and polyethylene (PE) powders were layered into a stainless steel mold and uniaxially pressed to achie
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f3041b1956debc181fb6d34fc871284b
https://doi.org/10.1016/j.msea.2007.06.056
https://doi.org/10.1016/j.msea.2007.06.056
Autor:
W. Patrick Ambrose, Ricky Chau, Jeffrey H. Nguyen, Minta Akin, Dayne Fratanduono, Paul D. Asimow, O. V. Fat'yanov, Neil C. Holmes
Publikováno v:
Physical Review B. 92
We respond to the Comment by Errandonea et al. [Phys. Rev. B 92, 026101 (2015)] on their reinterpretation of our published data [Nguyen et al., Phys. Rev. B 89, 174109 (2014)]. In the original paper, we argued that there is no solid-solid phase trans
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c9ca30d0e3e05fff9c7bd2f3255536b1
https://doi.org/10.1103/physrevb.92.026102
https://doi.org/10.1103/physrevb.92.026102
Autor:
Bimal K. Kad, James McNaney, H. Jarmakani, Marc A. Meyers, M. S. Schneider, Jeffrey H. Nguyen
Publikováno v:
Journal de Physique IV (Proceedings). 134:37-42
Single crystalline copper was subjected to quasi-isentropic compression via gas-gun and laser loading at pressures between 18GPa and 59GPa. The deformation substructure was analyzed via transmission electron microscopy (TEM). Twins and laths were evi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::799294c0783319725a018ff7b9e19f29
https://doi.org/10.1051/jp4:2006134007
https://doi.org/10.1051/jp4:2006134007
Publikováno v:
Materials Science and Engineering: A. 427:83-91
Fabrication of compositionally graded structures for use as light-gas gun impactors has been demonstrated using a tape casting technique. Mixtures of metal powders in the Mg–Cu system were cast into a series of tapes with uniform compositions rangi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3a605da75fed01ba9b854068ff23cd85
https://doi.org/10.1016/j.msea.2006.04.039
https://doi.org/10.1016/j.msea.2006.04.039
Autor:
Jeffrey H. Nguyen, W. Patrick Ambrose, Dayne Fratanduono, Neil C. Holmes, Ricky Chau, Minta Akin, Paul D. Asimow, O. V. Fat'yanov
Publikováno v:
Physical Review B. 89
We measured the longitudinal sound velocity in Mo shock compressed up to 4.4 Mbars on the Hugoniot. Its sound speed increases linearly with pressure up to 2.6 Mbars; the slope then decreases up to the melting pressure of ∼3.8 Mbars. This suggests a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8c25dce7f6f747ce4a2c6310bb0dc75a
https://doi.org/10.1103/physrevb.89.174109
https://doi.org/10.1103/physrevb.89.174109
Autor:
Naotaka Tomioka, Kiyoshi Fujino, Wendel A. Caldwell, Nobuyoshi Miyajima, Toru Shinmei, Nobumasa Funamori, Jeffrey H. Nguyen, Abby Kavner, Raymond Jeanloz
Publikováno v:
Journal of Geophysical Research: Solid Earth. 103:20813-20818
X ray diffraction and transmission electron microscopy on laser-heated diamond cell samples show that with increasing pressure MgAl2O4 spinel transforms first to Al2O3 corundum + MgO periclase, then to the CaFe2O4-structured phase, and finally to a n
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8dc1805d330e117c762df3943fb45aa8
https://doi.org/10.1029/98jb01575
https://doi.org/10.1029/98jb01575
Autor:
Raymond Jeanloz, Moshe P. Pasternak, Xiaoyuan Li, Catherine McCammon, R. D. Taylor, Jeffrey H. Nguyen
Publikováno v:
Physical Review Letters. 79:5046-5049
First studies of M\"ossbauer spectroscopy to pressures above 100 GPa are reported. The magnetic state of ${\mathrm{Fe}}_{0.94}\mathrm{O}$ was investigated to 120 GPa at $T\ensuremath{\le}300\mathrm{K}$. At 300 K a diamagnetic low-spin (LS) state of $
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8c629852e5599927612dd6a49d0c0492
https://doi.org/10.1103/physrevlett.79.5046
https://doi.org/10.1103/physrevlett.79.5046
Autor:
Steven G. Louie, Bernd G. Pfrommer, Raymond Jeanloz, Wendel A. Caldwell, Jeffrey H. Nguyen, Francesco Mauri
Publikováno v:
Science. 277:930-933
Although xenon becomes metallic at pressures above about 100 gigapascals, a combination of quantum mechanical calculations and high pressure–temperature experiments reveals no tendency on the part of xenon to form a metal alloy with iron or platinu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eb3bab956b027cb51eaa977396298c0c
https://doi.org/10.1126/science.277.5328.930
https://doi.org/10.1126/science.277.5328.930