Article
Energy & Fuels
Mohsin Raza, Jizhen Zhu, Wenjun Zhong, Feng Yuan, Mao Yebing, Sixu Wang, Xingcai Lu
Summary: This study investigates the low-to-high temperature oxidation of n-pentadecane using experimental and kinetic modeling approaches. The results show that ignition delay times are sensitive to factors such as pressure, equivalence ratio, and oxygen mole fraction. The updated reaction mechanism improves the performance of n-pentadecane autoignition, especially at low temperatures.
Article
Nanoscience & Nanotechnology
Yonghe Zhang, Min Xie, Zhigang Wang, Xiwen Song, Rende Mu, Fen Zhou, Jinxiao Bao, Jianquan Gao, Wei Pan
Summary: The comprehensive discussion on the increase of thermal conductivity in high-temperature thermal barrier coatings is lacking. This study examines the behavior of increased high-temperature thermal conductivity in (La0.2Gd0.2Y0.2Yb0.2Er0.2)2(Zr1-xTix)2O7 high-entropy ceramics. The thermal conductivities of x = 0.1-0.5 components increase with composition and temperature above 600 degrees C. The improved photon thermal conductivity, indicated by significantly reduced emissivity and improved transmittance, is the main reason for the increase in high-temperature thermal conductivity. Importantly, this study provides a pathway to explore different behaviors of high-temperature thermal conductivity and contributes to the design and development of advanced thermal barrier coatings with low thermal conductivity.
SCRIPTA MATERIALIA
(2023)
Article
Geochemistry & Geophysics
Joshua A. H. Littleton, Richard A. Secco, Wenjun Yong
Summary: Terrestrial-type planetary cores are mainly composed of iron (Fe) with possible impurities like sulfur (S). These impurities can affect the transport properties of the cores, influencing thermal convection and heat flow. Experimental methods have been used to measure electrical properties at high pressures and temperatures, showing that FeS is more conductive in both solid and molten states. This enhanced conductivity can impact the thermal evolution and magnetic field generation of planetary bodies.
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2021)
Article
Thermodynamics
Khaiyom Hakimov, Farhan Arafin, Khalid Aljohani, Khalil Djebbi, Erik Ninnemann, Subith S. Vasu, Aamir Farooq
Summary: Dibutyl ether (DBE) is a promising biofuel with high cetane number and volumetric energy density, suitable for direct use or blending with other fuels. This study investigated the oxidation and pyrolysis kinetics of DBE, revealing unique ignition behavior under fuel-lean conditions.
COMBUSTION AND FLAME
(2021)
Article
Crystallography
Wuxueying Qiu, Chang Su, Yonggang Liu, Wei Song
Summary: Based on an iterative numerical approach and experimental data from the literature, we determined the thermodynamic properties of MgAl2O4 spinel, including thermal expansion, heat capacity, entropy, and the Gruneisen parameter, which show nonlinearity and negative correlation with pressure over a wide temperature and pressure range.
Article
Chemistry, Physical
Zerui Sun, Changgen Shi, Li Gao, Sunlang Lin, Wenxuan Li
Summary: In high entropy alloys, the nanoscale precipitations and short-range orders greatly impact the material's mechanical properties and thermal physical properties. Experimental and simulation results showed that the intragranular segregation and ordering in the as-cast high entropy alloy have significant effects on its resistivity, thermal conductivity, and specific heat capacity. The alloy undergoes an order-disorder transition and phase decomposition during the heating process. Phonons play a dominant role in heat conduction. The temperature dependence of thermal conductivity and lattice thermal conductivity is observed. The experimental results are affected by intragranular segregation and ordering, showing differences with the simulation results at lower temperatures but good agreement at higher temperatures.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Geosciences, Multidisciplinary
Wenqing Sun, Lidong Dai, Haiying Hu, Mengqi Wang, Ziming Hu, Chenxin Jing
Summary: The electrical structures of the Earth's upper mantle are influenced by the ilmenite contents in the olivine-ilmenite systems. Conductivity increases with temperature and slightly with pressure. Interconnected ilmenites greatly enhance the conductivities of the system.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Energy & Fuels
T. Lucio-Martin, M. Roig-Flores, M. Izquierdo, M. C. Alonso
Summary: This study experimentally investigated the evolution of thermal conductivity of concrete at high temperatures, revealing that the initial loss of thermal conductivity during heating is mainly due to the loss of free water. Siliceous aggregates experienced the highest decrease in thermal conductivity, while the thermal conductivity partially recovered during the cooling phase.
Article
Thermodynamics
Inseok Yang, Daeho Kim
Summary: This study assessed the measurement uncertainty in thermal conductivity of insulation materials at high temperatures using a guarded hot plate apparatus. By employing calibrated thermocouples and proper auxiliary set temperatures, the effect of stray heat flow on the measurements was reduced.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Nanoscience & Nanotechnology
Frank Czerwinski, Marta Aniolek, Jian Li
Summary: Although Al3Ni fibers exhibit high coarsening resistance at high temperatures, they are ineffective in retaining strength, only maintaining 20% of room-temperature level at 500 degrees Celsius. During uniaxial compression at 400-500 degrees Celsius, both eutectic and pure aluminum show steady-state flow stress with negligible work hardening rate.
SCRIPTA MATERIALIA
(2022)
Article
Construction & Building Technology
Hanzhi Yang, Lei Wang, Chunhe Yang, Jian Zhao, Guangping Huang, Yintong Guo, Wei Victor Liu
Summary: This study aims to investigate the mechanical performance of oil-well cement slurries under high-temperature and high-pressure (HTHP) conditions. The research found that the testing under high-temperature conditions accelerated crack propagation and stress drop, decreased strength and Young's modulus, and resulted in more brittle characteristics of cement slurry samples. Therefore, the current standard is not suitable for assessing the mechanical properties of cement slurries in HTHP environments.
CEMENT AND CONCRETE RESEARCH
(2024)
Article
Materials Science, Ceramics
Yuhui Chen, Ruolin Zhang, Shen Hu, Pengyang Jiang, Jun Song, Xiani Huang
Summary: The study compared and evaluated the corrosion resistance and thermal shock resistance of ScxTa0.5_xYSZ coatings prepared via the solid-state reaction method. Results show that Sc0.25Ta0.25YSZ exhibited the best properties among tested materials, with excellent corrosion resistance and thermal stability at high temperatures, attributed to the small ionic radius of Sc3+ in the composite.
CERAMICS INTERNATIONAL
(2021)
Article
Multidisciplinary Sciences
Liqing Xu, Yu Xiao, Sining Wang, Bo Cui, Di Wu, Xiangdong Ding, Li-Dong Zhao
Summary: The authors achieved high thermoelectric performance in low-medium temperature PbSe through the introduction of dense dislocations. The dislocation density reached a high level and two types of dislocations were observed in n-type PbSe-based thermoelectric material. These dislocations effectively reduced the lattice thermal conductivity while maintaining high carrier transport.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Zufar Zaripov, Ruslan R. Nakipov, Farid M. Gumerov, Ilmutdin M. Abdulagatov
Summary: The isobaric heat capacity of hexadecane was measured using a differential scanning calorimeter, and the second temperature derivatives of specific volume, enthalpy, and entropy as a function of temperature and pressure were calculated.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Materials Science, Ceramics
Robert Vassen, Daniel Emil Mack, Martin Tandler, Yoo Jung Sohn, Doris Sebold, Olivier Guillon
Summary: Yttria-stabilized zirconia (YSZ) has been the state of the art material for thermal barrier coating (TBC) applications in gas turbines for several decades, but faces early failure issues at high temperatures. Research shows that reducing transient cooling rates can extend the lifetime of the coatings under typical cycling conditions.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Physics, Applied
A. M. Molodets, D. V. Shakhrai, A. A. Golyshev
Article
Physics, Multidisciplinary
A. M. Molodets, A. A. Golyshev, D. V. Shakhrai
JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS
(2017)
Article
Physics, Condensed Matter
A. M. Molodets, A. A. Golyshev, D. V. Shakhray, V. V. Kim
PHYSICS OF THE SOLID STATE
(2017)
Article
Physics, Multidisciplinary
A. M. Molodets, A. A. Golyshev
JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS
(2018)
Article
Physics, Multidisciplinary
A. M. Molodets, A. S. Savinykh, A. A. Golyshev
Article
Physics, Condensed Matter
A. M. Molodets, A. A. Golyshev
PHYSICS OF THE SOLID STATE
(2019)
Article
Physics, Condensed Matter
A. M. Molodets, A. A. Golyshev, D. V. Shakhrai, D. Yu. Kovalev
PHYSICS OF THE SOLID STATE
(2020)
Article
Physics, Multidisciplinary
A. M. Molodets, A. A. Golyshev, G. V. Shilov
JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS
(2020)
Article
Geochemistry & Geophysics
A. M. Molodets
Summary: This paper aims to establish the equations of state for muscovite under high pressures and temperatures. The reliability of the equations is validated by comparing calculated and experimental thermophysical properties, showing agreement in the range of approximately 70 GPa and 1700 K.
IZVESTIYA-PHYSICS OF THE SOLID EARTH
(2022)
Article
Physics, Applied
A. M. Molodets, A. A. Golyshev, A. N. Emel'yanov, A. A. Kozlov
Summary: A method for recording magnetic transformation under shock-wave loading is introduced, and the correlation between the pressures of magnetic transformation and polymorphic transitions of steel is shown through comparison of gauge readings and parameters.
Article
Physics, Applied
A. M. Molodets, A. A. Golyshev
Summary: This study presents a modification to the semiempirical description of the volume-temperature dependences of the electrical and thermal conductivities of alpha iron. By interpolating the resistivity and thermal conductivity values along high-temperature isobars and high-pressure isotherms, the effect of compression and extension on the thermal conductivity of alpha iron is estimated.
Article
Physics, Applied
A. M. Molodets, A. A. Golyshev, G. V. Shilov
Summary: This article presents experiments on shock wave compression and storage of powdered boron carbide samples, analyzing the changes in the samples during compression. The results show that the impact pressure and temperature have significant effects on the phase transitions and melting process of boron carbide.
Article
Metallurgy & Metallurgical Engineering
A. M. Molodets, A. S. Savinykh, A. A. Golyshev, G. Garkushin, G. Shilov, A. N. Nekrasov
Summary: This study verifies the microstructural characteristics of original textured tungsten samples and measures the free surface velocities of the samples in shock-wave experiments. The dynamic yield strength and spall strength values are determined for samples of various thicknesses. Mathematical modeling is conducted using the hydrocode algorithm, incorporating original equations of state, an elastoplastic model, and an instantaneous spall approximation. The reliability and predictive capabilities of simulating the physical and mechanical behavior of textured tungsten under shock-wave compression and high-speed tension conditions are discussed.
PHYSICS OF METALS AND METALLOGRAPHY
(2022)
Article
Physics, Multidisciplinary
A. M. Molodets, A. A. Golyshev, G. Shilov
Article
Physics, Applied
A. M. Molodets, A. S. Savinykh, A. A. Golyshev, G. V. Garkushin
TECHNICAL PHYSICS LETTERS
(2019)
