Zobrazeno 1 - 10 of 32 pro vyhledávání: '"Robert Farla"'
1
Akademický článek
Hard and tough novel high-pressure γ-Si3N4/Hf3N4 ceramic nanocomposites
Autor: Wei Li, Zhaoju Yu, Leonore Wiehl, Tianshu Jiang, Ying Zhan, Emmanuel III Ricohermoso, Martin Etter, Emanuel Ionescu, Qingbo Wen, Christian Lathe, Robert Farla, Dharma Teppala Teja, Sebastian Bruns, Marc Widenmeyer, Anke Weidenkaff, Leopoldo Molina-Luna, Ralf Riedel, Shrikant Bhat
Publikováno v: Journal of Advanced Ceramics, Vol 12, Iss 7, Pp 1418-1429 (2023)
Cubic silicon nitride (γ-Si3N4) is superhard and one of the hardest materials after diamond and cubic boron nitride (cBN), but has higher thermal stability in an oxidizing environment than diamond, making it a competitive candidate for technological
Externí odkaz: https://doaj.org/article/fc8a977dbe9b4710926a52b0349d9421
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2
Akademický článek
Towards joint in situ determination of pressure and temperature in the large volume press exclusively from X-ray diffraction
Autor: Robert Farla
Publikováno v: Journal of Synchrotron Radiation, Vol 30, Iss 4, Pp 807-814 (2023)
Since high-pressure devices have been used at synchrotron facilities, accurate determination of pressure and temperature in the sample has been a crucial objective, particularly for experiments that simulate the Earth's interior. However, in some cas
Externí odkaz: https://doaj.org/article/bad4f92fcacb4245b91ae7586241afc2
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3
Akademický článek
Extreme conditions research using the large-volume press at the P61B endstation, PETRA III
Autor: Robert Farla, Shrikant Bhat, Stefan Sonntag, Artem Chanyshev, Shuailing Ma, Takayuki Ishii, Zhaodong Liu, Adrien Néri, Norimasa Nishiyama, Guilherme Abreu Faria, Thomas Wroblewski, Horst Schulte-Schrepping, Wolfgang Drube, Oliver Seeck, Tomoo Katsura
Publikováno v: Journal of Synchrotron Radiation, Vol 29, Iss 2, Pp 409-423 (2022)
Penetrating, high-energy synchrotron X-rays are in strong demand, particularly for high-pressure research in physics, chemistry and geosciences, and for materials engineering research under less extreme conditions. A new high-energy wiggler beamline
Externí odkaz: https://doaj.org/article/bb84a349e9034cf0b3d431ae92f01e7f
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4
Akademický článek
Microstructural effects on hardness and optical transparency of birefringent aluminosilicate nanoceramics
Autor: Nico A. Gaida, Norimasa Nishiyama, Oliver Beermann, Ulrich Schürmann, Atsunobu Masuno, Christopher Giehl, Ken Niwa, Masashi Hasegawa, Shrikant Bhat, Robert Farla, Lorenz Kienle
Publikováno v: International Journal of Ceramic Engineering & Science, Vol 2, Iss 2, Pp 76-82 (2020)
Abstract Transparent nanoceramics, synthesized at extreme conditions of high pressure and temperature, are new classes of materials highly attractive for photonic applications, such as optical windows, which require additional increased hardness and
Externí odkaz: https://doaj.org/article/718c889e5f8c4c1a94c0ffbd1b5b7491
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6
H2O-present melting curve of magnesite and trace element distribution during melting of (dry) magnesite and calcite in the upper mantle
Autor: Melanie J. Sieber, HansJosef Reichmann, Robert Farla, Oona Appelt, Marcus Oelze, Christian Lathe, Monika Koch-Müller
The presence of magnesite (MgCO3) in the Earth’s mantle plays a fundamental role in reducing the melting point of the mantle [1] and forming carbonate‑rich melts such as kimberlites and carbonatites [2]. The melting curve of (dry) magnesite is we
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bbc510653cc2fa4c6f8100c43e271cc8
https://doi.org/10.5194/egusphere-egu23-7797
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8
In situ reinvestigation of reaction phase A plus high-pressure clinoenstatite to forsterite plus water in the system MgO-SiO2-H2O (MSH)
Autor: Christian Lathe, Monika Koch-Müller, Bernd Wunder, Oona Appelt, Shrikant Bhat, Robert Farla
Publikováno v: European Journal of Mineralogy. 34:201-213
The dehydration reaction of phase A + high P clinoenstatite to forsterite + water was experimentally investigated at water-saturated conditions in the pressure range between 7.0 and 10.0 GPa by in situ reversal runs in a multi-anvil press at the sync
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::26f92e93cc9ebff5caf4aa3e36bd1a76
https://doi.org/10.5194/ejm-34-201-2022
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9
Acoustic Emission Detection of Micro-cracks under High Pressure and High Temperature in a Deformation Large-Volume Apparatus at the Endstation P61B, PETRA III
Autor: Julien Gasc, Robert Farla, Shuailing Ma
Publikováno v: Review of scientific instruments 94, 023901 (2023). doi:10.1063/5.0107630
Review of scientific instruments 94, 023901 (2023). doi:10.1063/5.0107630
We successfully developed an in situ acoustic emission (AE) detection setup that allows recording of AE waveforms (triggered and streaming) and simultaneous x-ray diffract
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::004244381cf334a87562fad70231f9c3
https://bib-pubdb1.desy.de/record/479273
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10
Ferric Iron Substitution Mechanism in Bridgmanite under SiO$_2$ -Saturated Conditions at 27 GPa
Autor: Artem Chanyshev, Hongzhan Fei, Dmitry Bondar, Biao Wang, Zhaodong Liu, Takayuki Ishii, Robert Farla, Catherine McCammon, Tomoo Katsura
Publikováno v: ACS earth and space chemistry 7(2), 471-478 (2023). doi:10.1021/acsearthspacechem.2c00326
ACS earth and space chemistry 7(2), 471 - 478 (2023). doi:10.1021/acsearthspacechem.2c00326
The chemistry of bridgmanite is a crucial parameter for understanding the structure and dynamics of the Earth’s lower mantle. Incorporating Al, Fe$^{2+
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c7a18f6eaf1a91161fb8e7d248e949ab
https://bib-pubdb1.desy.de/record/580328
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