Results 41 to 50 of about 5,753,745 (253)

Thermoelasticity of Hexagonal Close-Packed Iron from the Phonon Density of States [PDF]

, 2012
Iron is the main constituent in Earth’s core, along with ~5 to 10 wt% Ni and some light elements (e.g., H, C, O, Si, S). This thesis explores the vibrational thermodynamic and thermoelastic properties of pure hexagonal close-packed iron (ε-Fe), in an ...
Murphy, Caitlin Anne
core   +1 more source

Experimental study on influences of surface surcharge on existing shield tunnels buried in soft and hard soils

Yantu gongcheng xuebao, 2019
To explore the influences of surface surcharge on the existing shield tunnels buried in soft and hard soil strata, the scaled model tests on the interaction between shield tunnels and strata are carried out, and the tunnel deformation, earth pressure and
HUANG Da-wei 1, ZHOU Shun-hua 2, FENG Qing-song 1 , LI Xue 3, FENG Kun 4, HUANG Qiang 5
doaj   +1 more source

Adsorption behavior of H2 in quartz silt-pores at high temperature and pressure

AIP Advances, 2023
To understand the storage and transport of H2 in the Earth’s interior, the adsorption behaviors of H2 in the slit-like pore of quartz under different conditions were calculated by the grand canonical Monte Carlo method.
Longxing Yang, Shide Mao, Li Yi, Hong Liu, Hanyu Wang, Haibo Liu, Lei Liu   +6 more
doaj   +1 more source

High-pressure and temperature investigation of silicic acid ± water with implications for the ice polymorphism, lunar moganite and diamonds growth media

Progress in Earth and Planetary Science
The polymorphism of ice has been widely investigated over the last decades, and the results were found to be applicable over a wide range of terrestrial and extraterrestrial environments with recent findings also among the mineral inclusions entrapped in
G. Marras, Y. Lu, V. Stopponi, R. Tao, Y. Lin, Vincenzo Stagno   +5 more
doaj   +1 more source

Experimental Evidence for Partially Dehydrogenated ε-FeOOH

Crystals, 2019
Hydrogen in hydrous minerals becomes highly mobile as it approaches the geotherm of the lower mantle. Its diffusion and transportation behaviors under high pressure are important in order to understand the crystallographic properties of hydrous minerals.
Yukai Zhuang, Zhongxun Cui, Dongzhou Zhang, Jin Liu, Renbiao Tao, Qingyang Hu   +5 more
doaj   +1 more source

CALCULATION OF SEISMICALLY LOADED EARTH RETAINING STRUCTURES

Acta Polytechnica CTU Proceedings, 2022
Eurocode 1998-5 for the design of earth retaining structures in seismic conditions describes calculations using the Mononobe-Okabe method. This simplified quasi-static procedure is to some extent very conservative.
Jan Pruška, Veronika Pavelcová
doaj   +1 more source

Simplified Method for Calculating the Active Earth Pressure on Retaining Walls of Narrow Backfill Width Based on DEM Analysis

Advance in Civil Engineering, 2019
Spaces for backfills are often constrained and narrowed when retaining walls must be built close to existing stable walls in urban areas or near rock faces in mountainous areas.
Minghui Yang, Bo Deng
semanticscholar   +1 more source

High-pressure phases and transitions of the layered alkaline earth nitridosilicates SrSiN2 and BaSiN2 [PDF]

, 2009
We investigate the high-pressure phase diagram of SrSiN2 and BaSiN2 with density-functional calculation. Searching a manifold of possible candidate structures, we propose new structural modifications of SrSiN2 and BaSiN2 attainable in high-pressure ...
Schnick, Wolfgang, Römer, Rebecca, Kroll, Peter   +2 more
core   +1 more source

Alumina nanoparticle-induced decarbonation at subduction-zone conditions

Communications Chemistry
The evolution of calcium carbonate in subduction zones exerts profound effects on Earth’s long-term climate dynamics and planetary habitability. Here, we report the first experimental study to elucidate the influence of aluminum oxide particle size on ...
Jun Hu, Jin Liu, Yifeng Zhu, Penghui Sun, Ao Deng, Chaojia Lv, Liangxu Xu, Fengxia Sun, Lei Li, Yongjun Tian   +9 more
doaj   +1 more source

High-pressure synthesis, mechanical properties, and oxidation behavior of advanced boron-containing α/β-Si3N4/Si ceramics using polymer-derived amorphous SiBN ceramics

Journal of Advanced Ceramics
The preparation of dense Si3N4-based ceramics has attracted great attention because of the achievable improvements in their mechanical properties and high-temperature oxidation resistance.
Wei Li, Shuailing Ma, Siwen Cui, Jingxue Ding, Marc Widenmeyer, Xiaoqi Zhang, Ying Zhan, Zhaoju Yu, Wenshu Zhang, Pinwen Zhu, Tian Cui, Anke Weidenkaff, Ralf Riedel   +12 more
doaj   +1 more source