Article
Geosciences, Multidisciplinary
Qiang Sun, Jianjun Hu
Summary: The study found significant changes in the physical properties of granite at different temperatures, with heat treatment temperature affecting thermal conductivity and heat transfer. Between 400 degrees C and 600 degrees C, the surface roughness, cracks, and color of the granite significantly increased, while thermal diffusivity, thermal conductivity, and P-wave velocity decreased with rising temperatures.
JOURNAL OF APPLIED GEOPHYSICS
(2021)
Article
Thermodynamics
Jiliang Pan, Xun Xi, Xu Wu, Qifeng Guo, Fenhua Ren, Meifeng Cai
Summary: Geothermal reservoirs can be reformed through thermal and chemical stimulation combined with hydrofracture. The physical properties of granite were studied after thermal-chemical stimulation at different temperatures. It was found that thermal stimulation had a greater impact on the physical properties, particularly at a temperature over 300 degrees Celsius.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Engineering, Mechanical
Jianchang Zhu, Jianqiu Liu, Minsheng Huang, Zhenhuan Li, Lv Zhao
Summary: This study investigates the orientation effect on void growth in polycrystals by considering different void-grain boundary (GB) relative positions. The results show that the mechanism for orientation effect on void growth in single crystals is not preserved in polycrystals. The statistical analysis reveals that the void growth distribution is closely associated with the void-GB relative position. This study provides deeper insights into the mechanism of damage evolution in polycrystalline metals.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Materials Science, Ceramics
Yongshun Zou, Huazhi Gu, Ao Huang, Yanzhu Huo, Lvping Fu, Yawei Li
Summary: Development of microporous magnesia-based aggregates at high temperature can enhance ceramic bonding, thermal conductivity, and thermal shock resistance, with pore size distribution being the main factor affecting thermal conductivity.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Mechanical
A. R. Cui, S. C. Hu, S. Zhang, J. C. Cheng, Q. Li, J. Y. Huang, S. N. Luo
Summary: The spall damage of a coarse-grained CrCoNi MEA with a face-centered-cubic structure is investigated using plate impact experiments and molecular dynamics simulations. The highest spall strength (around 4 GPa) among the MEAs/HEAs ever reported is observed, along with similar or better impact ductility. The dominant damage mode undergoes a transition from intergranular to intragranular damage with increasing impact velocity, consistent with the findings from MD simulations.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Engineering, Environmental
Yan-jun Shen, Jian-shuai Hao, Xin Hou, Jiang-qiang Yuan, Zhi-peng Bai
Summary: This study investigated crack propagation in high-temperature granite subjected to different cooling shocks. Results showed a critical temperature range of 350-550 degrees C for sudden changes in crack macroscopic shape, with cooling shocks significantly enhancing thermal damage.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2021)
Article
Mining & Mineral Processing
Jianjun Hu, Heping Xie, Qiang Sun, Cunbao Li, Guikang Liu
Summary: This study conducted thermal damage tests on granite at different temperatures and quenching cycles to reveal the impact of thermal fatigue damage on hot dry rock. Results showed that increasing temperature and cycles led to crack development in granite, reducing its properties. The research also established a nonlinear relationship among thermal conductivity, temperature, and cycle number for hot dry rock, providing theoretical support for reservoir reconstruction and production efficiency evaluation.
INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY
(2021)
Article
Multidisciplinary Sciences
Inseon Oh, Jungmin Park, Daeseong Choe, Junhyeon Jo, Hyeonjung Jeong, Mi-Jin Jin, Younghun Jo, Joonki Suh, Byoung-Chul Min, Jung-Woo Yoo
Summary: The molecule-based magnetic film for spin thermoelectric applications offers various synthetic routes, weak spin-lattice interaction, and low thermal conductivity, enabling effective energy harvesting from waste heat. By electrochemically depositing thin films on chromium electrodes at room temperature and demonstrating extremely low heat loss, this new class of magnet paves the way for sustainable recycling of ubiquitous waste heat.
NATURE COMMUNICATIONS
(2021)
Article
Engineering, Environmental
Jiamin Wang, Peng Zhang, Mohua Bu, Zhaolong Luan, Shouguang Wang
Summary: In this study, a numerical model was established to investigate the effect of high temperature on the mechanical performance of granite. The results showed that granite mainly suffered heat damage in the form of tensile cracks. With the increase in temperature, the degree of fracture in granite increased, exhibiting a post-peak decrease in brittleness and an increase in ductility. When the heating temperature exceeded 450°C, thermal damage began to dominate the failure mode of granite.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2023)
Article
Materials Science, Ceramics
Hisayuki Imamura, Tsunehiro Kawata, Sawao Honda, Yuji Iwamoto
Summary: In this study, beta-silicon nitride (beta-Si3N4) ceramics with an additive oxide system were fabricated by liquid phase sintering. The microstructure and thermal conductivity of the materials were investigated by adjusting the sintering time and the additive content. The improved thermal conductivity was attributed to the formation of high purity large beta-Si3N4 grains.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Geochemistry & Geophysics
Wenchao Zheng, Guoping Hu, Yunzhao Wu, Qi Jin, Zhengmei Li, Li Feng
Summary: In this study, a 1-D thermal model with updated bulk densities is used to calculate the surface thermal conductivity of the Moon based on the temperature sensor data and measurements from the Chang'E-4 lander. The results show that the range of surface layer contact conductivity is (0.95-2.26) x 10(-3) Wm(-1) center dot K-1 for T1, (1.04-2.44) x 10-3 Wm(-1) center dot K-1 for T2, (0.60-1.40) x 10(-3) Wm(-1) center dot K-1 for T3, and (0.60-1.39) x 10(-3) Wm(-1) center dot K-1 for T4, respectively. Factors such as the shadowing effect, rock abundance, lateral conduction, and densification effect during the measurements were also discussed.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2023)
Article
Quantum Science & Technology
Alexander Bilmes, Serhii Volosheniuk, Jan David Brehm, Alexey Ustinov, Jurgen Lisenfeld
Summary: This study introduces a method for characterizing individual TLS in thin film materials, offering a new avenue for quantum device development. Strong interactions between coherent TLS in the sample material were observed, providing important insights for exploring the structure of tunneling defects and developing low-loss dielectrics.
NPJ QUANTUM INFORMATION
(2021)
Article
Chemistry, Physical
Un-Gi Jong, Yun-Sim Kim, Chol-Hyok Ri, Yun-Hyok Kye, Chol-Jun Yu
Summary: Based on theoretical calculations, this study predicts the superior thermoelectric performance of the perovskite CsBI3 materials at high temperatures, mainly due to strong anharmonic phonon modes and highly degenerate electronic bands.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Pharmacology & Pharmacy
Robert-Alexandru Vlad, Cezara Pintea, Diana-Andreea Chirtes, Paula Antonoaea, Emoeke Margit Redai, Nicoleta Todoran, Magdalena Birsan, Adriana Ciurba
Summary: The study aims to investigate the impact of intergranular superdisintegrant on the properties of drotaverine hydrochloride fast-dissolving granules and orodispersible tablets. Orodispersible tablets were obtained by compressing the granules and excipient mixture. Different concentrations of superdisintegrant excipients were used to develop the tablets, which met the quality requirements in terms of friability, crushing strength, and disintegration time. The release of drotaverine from the tablets showed satisfactory results within the specified time.
Article
Engineering, Geological
Yuekun Xing, Bingxiang Huang
Summary: This study proposed a thermoplastic cohesive fracturing model for thermally-treated granite, incorporating temperature-dependent softening rule and completely coupled stress-strain-temperature constitutive relation. The model was validated with experimental data, showing significant temperature-dependent properties in granite fracturing mechanisms. The findings contribute to a better understanding of the fracturing behavior of granite under temperature-dependent conditions.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2021)
