Results 61 to 70 of about 4,156,272 (342)

Heat transfer foot print on ceramics after thermal shock with droplet impingement: Development of thermal shock tolerant material with hydrophobic surface

AIP Advances, 2018
We perform a systematic study of the thermal shock experienced by the alumina during quenching by cold water droplet impingement with heated surface temperature ranging from 125°C to 475°C for Weber number ≈32.
Divya J. Prakash, Youho Lee
doaj   +1 more source

Nonthermal gamma-ray and X-ray flashes from shock breakout in gamma-ray bursts/supernovae

, 2006
Thermal X-ray emission which is simultaneous with the prompt gamma-rays has been detected for the first time from a supernova connected with a gamma-ray burst (GRB), namely GRB060218/SN2006aj.
Blandford R. D., Eli Waxman, Ghisellini G., Nugis T., Peter Meszaros, Pozdniakov L. A., Pozdniakov L. A., Thompson C., Xiang‐Yu Wang, Zhuo Li   +9 more
core   +1 more source

Investigation of Laser Ablation and Brush Pre‐Treatments for AlCu Cold Roll Bonding in Oxygen‐Free Conditions

Advanced Engineering Materials, EarlyView.
It is shown that laser ablation pretreatment under oxygen‐free conditions enables copper–aluminium bonding at significantly lower deformation degrees and improved properties compared to mechanical brushing. Laser ablation further increases interface contact area and induces favourable residual stress states and microstructural compatibility ...
Khemais Barienti, Finn‐Lennard Janthur, Selina Raumel, Sascha Jan Zimmermann, Sarah Seffer, René Gustus, Sebastian Herbst, Marc C. Wurz, Ludger Overmeyer, Wolfgang Maus‐Friedrichs, Hans Jürgen Maier, Florian Nürnberger   +11 more
wiley   +1 more source

The effects of aging on the cyclical thermal shock response of a copper-beryllium alloy as a substrate of cooling wheel in planar flow casting process

Materials Research Express, 2020
In planar flow casting (PFC) process, the molten alloy from nozzle exerts cyclical thermal shock on the substrate surface of cooling wheel and the cyclical thermal shock causes damage to the substrate surface in the form of defects.
Deren Li, Zhichao Lu
doaj   +1 more source

Microstructural Evolution and Vacancy Defect Formation in Mn–Mo–Ni RPV Steel Under Low Cycle Fatigue: Insights From EBSD and PALS

Advanced Engineering Materials, EarlyView.
Low‐cycle fatigue damage in Mn–Mo–Ni reactor pressure vessel steel is examined using a combined electron backscatter diffraction and positron annihilation lifetime spectroscopy approach. The study correlates texture evolution, dislocation substructure development, and vacancy‐type defect formation across uniform, necked, and fracture regions, providing
Apu Sarkar, Dhanadeep Dutta, G. Bharat Reddy   +2 more
wiley   +1 more source

Effect of Repeated Thermal Shock on Mechanical Properties of ZrB2-SiC-BN Ceramic Composites

The Scientific World Journal, 2014
ZrB2-20 vol.% SiC-10 vol.% h-BN (particles) ceramic composites (ZSB) were fabricated by hot pressing under inert gas protected. ZSB samples with mean size 75 × 55 × 40 mm3 were heated using current heating method and then cooled down to low temperature ...
Gang Li, Hongbo Chen
doaj   +1 more source

Electrical Conductivities of Conductors, Semiconductors, and Their Mixtures at Elevated Temperatures

Advanced Engineering Materials, EarlyView.
This article presents a comprehensive review of temperature‐dependent electrical conductivity data for multiple material classes at elevated temperatures, highlighting a persistent conductivity gap between metals and semiconductors in the range of 102$\left(10\right)^{2}$– 107$\left(10\right)^{7}$ S/m. Metal–ceramic irregular metamaterials are proposed
Valentina Torres Nieto, Marcia A. Cooper
wiley   +1 more source

Mechanisms and experimental study of directional thermal shock fracture of granite under bidirectional horizontal loading

Geomechanics and Geophysics for Geo-Energy and Geo-Resources
The study of the mechanism of thermal shock directional fracture of rocks under bidirectional horizontal stress is important for the application of directional thermal shock fracture technology.
Chao Zhang, Zijun Feng, Chen Mi, Zhengnan Chen, Haojian Geng, Chenguang Shen   +5 more
doaj   +1 more source

Impact fracturing of rock-like material using carbon dioxide under different temperatures and pressures

Journal of Rock Mechanics and Geotechnical Engineering
Unconventional resources (oil, gas, and geothermal) are often buried deep underground within dense rock strata and complex geological structures, making it increasingly difficult to create volumetric fractures through conventional hydraulic fracturing ...
Shaobin Hu, Zhengyong Yan, Chun Zhu, Manchao He, Shuogang Pang   +4 more
doaj   +1 more source

Thermal instability in the collisionally cooled gas

, 2011
We have presented the non-equilibrium (time-dependent) cooling rate and ionization state calculations for a gas behind shock waves with $v \sim 50-150$ km s$^{-1}$ ($T_s \sim 0.5 - 6\times 10^5$ K). Such shock waves do not lead to the radiative precursor
Agafonova, Aguirre, Asplund, Binette, Binney, Brown, Burkert, Chevalier, Corbelli, Cox, David, de Avillez, Dopita, Drake, Edgar, Evgenii O. Vasiliev, Ferland, Ferrara, Field, Fox, Gazol, Gnat, Gnat, Gnedin, Hunter, Indebetouw, Indebetouw, Madau, Meiksin, Nulsen, Shchekinov, Shchekinov, Shchekinov, Simcoe, Slavin, Smith, Spitzer, Sutherland, Sutherland, Vasiliev, Vasiliev, Yamada   +41 more
core   +1 more source