Results 81 to 90 of about 34,107 (312)

Microstructure Modification of Additively Manufactured Mo–9Si–8B by Annealing and Its Effects on High‐Temperature Mechanical Properties

Advanced Engineering Materials, EarlyView.
Postbuild annealing systematically modifies the phase fractions and morphology of EB‐PBF processed Mo–9Si–8B. Quantitative microstructure–property correlations reveal how controlled phase evolution enhances high‐temperature compressive strength and creep resistance.
Christopher Schmidt, Yong Chen, Georg Hasemann, Benjamin Wahlmann, Carolin Körner, Manja Krüger   +5 more
wiley   +1 more source

Galactic metallicity distribution from open clusters

, 2004
We have compiled two new Galactic open cluster catalogues. The first one has 119 objects with age, distance and metallicity data, while the second one has 144 objects with both absolute proper motion and radial velocity data, of which 45 clusters also ...
Wang, JJ, Chen, L, Duc, PA, Brinks, E, Braine, J, Hou, JL   +5 more
core  

First-principles study of half-metallicity in semi-hydrogenated BC3

, 2011
Using first principles calculations, we investigate the electronic structures of semi-hydrogenated BC3, BC5, BC7, and B-doped graphone sheets. We find that all the semi-hydrogenated boron-carbon sheets exhibit half-metallic behaviors.
Ni, J, Lin Shi, Shi, L (石林), Weihua Tang, Li, CR, Yanli Wang, Jun Ni, Ding, Yi, Yi Ding, Ding, Y, Siqi Shi, Chaorong Li, Wang, YL, Shi, SQ, Tang, WH   +14 more
core   +1 more source

Uniform Amorphization of Crystalline Silicon Surfaces Enabled by Deep Ultraviolet Femtosecond Laser Pulses

Advanced Engineering Materials, EarlyView.
Deep‐UV (258 nm) femtosecond pulses enable uniform amorphous silicon writing on Si(100)/(111) with a six‐fold larger fluence amorphization window than NIR methods. Optimized fluence and overlap yield 20–45 nm uniform and continuous amorphous layers. Microscopy shows sharp interfaces, and real‐time reflectivity reveals nanosecond melt–resolidification ...
Wissal Benali, Magali Gregoire, Matys Guyard, Tatiana Itina, David Grojo, Pol Sopeña   +5 more
wiley   +1 more source

SDSS-IV MaNGA: Spatial Evolution of Gas-phase Metallicity Changes Induced by Galaxy Interactions

The Astrophysical Journal
Gas-phase metallicity in interacting and merging galaxies offers key insights into their star formation processes and evolutionary histories. This study investigates the spatial evolution of gas-phase metallicity (i.e., oxygen abundance, 12 + log(O/H ...
Hsi-An Pan, Lihwai Lin, Sebastián F. Sánchez, Jorge K. Barrera-Ballesteros, Bau-Ching Hsieh   +4 more
doaj   +1 more source

The K2-HERMES Survey: age and metallicity of the thick disc [PDF]

, 2019
Asteroseismology is a promising tool to study Galactic structure and evolution because it can probe the ages of stars. Earlier attempts comparing seismic data from the Kepler satellite with predictions from Galaxy models found that the models predicted ...
Buder, Sven, Freeman, Ken, Simpson, Jeffrey D.,, Li, Tanda,, Kallinger, Thomas, Cotar, Klemen, Hon, Marc, Horner, Jonathan,, Cotar, Klemen,, D'ORAZI, VALENTINA, Zwitter, Tomaz, Ting, Yuan-Sen,, Traven, Gregor, Sharma, Sanjib, Chen, Boquan, Bedding, Timothy R., KHANNA, Shourya, Hayden, Michael R.,, Lin, Jane,, Martell, Sarah,, Nataf, David M., Sharma, Sanjib,, Stello, Dennis, Wittenmyer, Rob A., Saadon, Mohd Hafiz Mohd, Esdaile, James,, Lind, Karin,, Lind, Karin, Khanna, Shourya,, Li, Tanda, Esdaile, James, Lewis, Geraint F.,, Zinn, Joel C.,, Asplund, Martin, Freeman, Ken,, De Silva, Gayandhi M.,, D'Orazi, Valentina,, Wittenmyer, Rob A.,, Lewis, Geraint F., Nataf, David M.,, Zwitter, Tomaz,, Kafle, Prajwal R., Hon, Marc,, Kos, Janez,, Kafle, Prajwal R.,, Bland-Hawthorn, Joss, Kallinger, Thomas,, Stello, Dennis,, Nordlander, Thomas,, Wyse, Rosemary F. G.,, Hayden, Michael R., Bland-Hawthorn, Joss,, Simpson, Jeffrey D., Chen, Boquan,, Nordlander, Thomas, Saadon, Mohd Hafiz Mohd,, Zinn, Joel C., Zucker, Daniel B., Huber, Daniel,, De Silva, Gayandhi M., Lin, Jane, Bedding, Timothy R.,, Kos, Janez, Huber, Daniel, Ting, Yuan-Sen, Wright, Duncan,, Buder, Sven,, Traven, Gregor,, Martell, Sarah, Wright, Duncan, Asplund, Martin,, Wyse, Rosemary F. G., Horner, Jonathan, Zucker, Daniel B.,   +73 more
core   +1 more source

Superlubricity and Corrosion Inhibition Properties of Solvate Ionic Liquids in Hybrid Carbon Fiber Reinforced Plastic–Steel Interfaces

Advanced Engineering Materials, EarlyView.
Solvate ionic liquids lubrication reduced the coefficient of friction by ∼60% compared to dry sliding, reaching steady‐state values as low as 0.04–0.05. Corrosion weight‐loss measurements in 1 M HCl further demonstrated significant inhibition behavior, with only 100 ppm of [Li(G3)][TFSI] (∼68.5 μL/L) reducing corrosion‐product weight loss by 63 ...
Sameh Dabees, Timothy Harte, Bhagya Dharmasiri, Y. Athulya Wickramasingha, David J. Hayne, Daniel J. Eyckens, Luke C. Henderson   +6 more
wiley   +1 more source

No Metallicity Preference in Fast Radio Burst Host Galaxies

The Astrophysical Journal Letters
Fast radio bursts (FRBs) are millisecond-duration extragalactic radio transients of unknown origin, and studying their host galaxies could offer clues to constrain progenitor models.
Shotaro Yamasaki, Tetsuya Hashimoto, Haruka Kusakabe, Tomotsugu Goto   +3 more
doaj   +1 more source

Metal-metal bond lengths in complexes of transition metals [PDF]

Proceedings of the National Academy of Sciences, 1976
In complexes of the transition metals containing clusters of metal atoms the cobalt-cobalt bond lengths are almost always within 1 pm of the single-bond value 246 pm given by the enneacovalent radius of cobalt, whereas most of the observed iron-iron bond lengths are significantly larger than the single-bond value 248 pm, the mean ...
openaire   +2 more sources

The metallicity of the most distant quasars ⃰

, 2009
We investigate the metallicity of the broad line region (BLR) of a sample of 30 quasars in the redshift range 4 6 quasars. The latter result is puzzling, since the minimum enrichment timescale of carbón is about 1 Gyr, i.e.
RAUL MUJICA GARCIA
core