Results 91 to 100 of about 167,710 (319)

Interactions between Molten High‐Silicon Electrical Steels and Carbon‐Bonded MgO Refractories Based on Recyclates

Advanced Engineering Materials, EarlyView.
This study examines how several molten high‐silicon electrical steels interact with both conventional and recycled MgO–C refractories. For this, various immersion experiments are conducted. In addition to infiltration, a number of mechanisms are identified and explained that control the corrosion of the refractory material.
Lukas Neubert, Matheus Roberto Bellé, Anton Yehorov, Anhelina Mospan, Till M. J. Stadtmüller, Seetharaman Sridhar, Christos G. Aneziris, Olena Volkova   +7 more
wiley   +1 more source

The Extremely Metal-rich Knot of Stars at the Heart of the Galaxy

The Astrophysical Journal
We show with Gaia XP spectroscopy that extremely metal-rich (EMR) stars in the Milky Way ([M/H] _XP ≳ 0.5) are largely confined to a tight “knot” at the center of the Galaxy. This EMR knot is round in projection, has a fairly abrupt edge near R _GC,proj ∼
Hans-Walter Rix, Vedant Chandra, Gail Zasowski, Annalisa Pillepich, Sergey Khoperskov, Sofia Feltzing, Rosemary F. G. Wyse, Neige Frankel, Danny Horta, Juna Kollmeier, Keivan Stassun, Melissa K. Ness, Jonathan C. Bird, David Nidever, José G. Fernández-Trincado, João A. S. Amarante, Chervin F. P. Laporte, Jianhui Lian   +17 more
doaj   +1 more source

Laser Metal Deposition of Aluminum Alloys 7075 and 5083 with the Addition of Volatile Alloying Elements through Powder Blending

Advanced Engineering Materials, EarlyView.
This study investigates laser metal deposition of aluminum alloys EN AW‐7075 and EN AW‐5083, using powder blending to compensate zinc and magnesium evaporation. In situ alloying and ex situ alloying with ZnAl12 and AZ91 preserve near‐standard compositions and improve mechanical properties.
Finn Bendixen, Anastasiya Toenjes, Annika Bohlen, Thomas Seefeld   +3 more
wiley   +1 more source

Comparison of the Chemical Compositions between the Bright and Faint Red Clumps for the Metal-poor and Metal-rich Populations in the Milky Way Bulge

The Astrophysical Journal
We examined the double red clump (RC) observed in the Galactic bulge, interpreted as a difference in distance (“X-shaped bulge scenario”) or in chemical composition (“multiple population scenario”).
Seungsoo Hong, Dongwook Lim, Young-Wook Lee   +2 more
doaj   +1 more source

Multiple Stellar Populations in Metal-poor Globular Clusters with JWST: A NIRCam View of M92

The Astrophysical Journal, 2023
Recent work on metal-intermediate globular clusters (GCs) with [Fe/H] = −1.5 and −0.75 has illustrated the theoretical behavior of multiple populations in photometric diagrams obtained with the JWST.
Tuila Ziliotto, Antonino Milone, Anna F. Marino, Aaron L. Dotter, Alvio Renzini, Enrico Vesperini, Amanda Karakas, Giacomo Cordoni, Emanuele Dondoglio, Maria V. Legnardi, Edoardo P. Lagioia, Anjana Mohandasan, Sarah Baimukhametova   +12 more
doaj   +1 more source

Nucleosynthesis in Metal-Free and Metal-Poor Stars

, 2008
There have been a number of important recent developments in theoretical and observational studies of nucleosynthesis, especially regarding nucleosynthetic sources at low metallicities.
Qian, Yong-Zhong
core   +1 more source

Unidirectional Tape‐Based Composites from Hemp and Pineapple Leaf Fiber: Mechanical Performance in Conventional and Bio‐Based Matrices

Advanced Engineering Materials, EarlyView.
The study investigates novel semi‐finished products made of unidirectionally arranged hemp or pineapple leaf fiber‐reinforced composites produced from different matrices. The materials are analyzed in terms of their mechanical and interfacial properties and void content.
Nina Graupner, Raja Bade, Valentin Ackermann, Roja M. Baumann, Corvin Bischoff, Jona F. Ebeling, Oskar Glenz, Marlo Groh, Jonathan Groth, Finja Hiller, Tom Hirschmüller, Felix Menke, Syntcha Ngantchou Lecdou, Mika Ohler, Daniel Rafii Vardiny, Darius Richter, Dario Röper, Henrik Schumacher, Theresa Stein, Benjamin Vorbeck, Elisabeth Wermter, Kay Kölzig, Jörg Müssig   +22 more
wiley   +1 more source

Formation of WNL Stars in the MW and LMC Based on the k − ω Model

The Astrophysical Journal
We adopt a set of second-order differential equations ( k − ω model) to handle core convective overshooting in massive stars, simulate the evolution of nitrogen sequence Wolf–Rayet (WNL) stars with different metallicities and initial masses, both ...
Jijuan Si, Zhi Li, Yan Li
doaj   +1 more source

Can Ti‐Based MXenes Serve as Solid Lubricants for Brake Applications? A Tribological Study

Advanced Engineering Materials, EarlyView.
This study explores the first implementation of Ti‐based MXenes materials in brake pad friction composite material. The resulting composite material exhibits a 48% reduction in the wear rate; alongside significant improvements are observed for thermal and mechanical properties.
Eslam Mahmoud, Jakob Gruber, Hakan Göçerler, Pierluigi Bilotto, Christian Gierl‐Mayer, Elham Loni, Michael Naguib, Carsten Gachot   +7 more
wiley   +1 more source

Population Synthesis of Binary Carbon-enhanced Metal-poor Stars

, 2009
The carbon-enhanced metal-poor (CEMP) stars constitute approximately one fifth of the metal-poor ([Fe/H] ~< -2) population but their origin is not well understood. The most widely accepted formation scenario, invokes mass-transfer of carbon-rich material
Abia, Anders, Aoki, Aoki, Aoki, Aoki, Barbuy, Beers, Beers, Bonacic Marinovic, Bonacic Marinovic, Bondi, Boothroyd, Busso, Campbell, Charbonnel, Christlieb, Cohen, Collet, Cristallo, Denissenkov, Dewi, Duquennoy, E. Glebbeek, Eggleton, Eggleton, Eggleton, Frankowski, Frebel, Fujimoto, Gallino, Herwig, Herwig, Hurley, Iben, Iben, Izzard, Izzard, Izzard, Izzard, Johnson, Jonsell, Karakas, Karakas, Kippenhahn, Komiya, Kroupa, Lau, Lucatello, Lucatello, Lucatello, Luck, Lugaro, Masseron, McClure, McClure, McClure, Nelemans, Nollett, O. R. Pols, Otsuka, Pols, Preston, R. G. Izzard, R. J. Stancliffe, Richard, Richard, Ricker, Roederer, Ryan, Schlattl, Schröder, Schuler, Siess, Sneden, Stancliffe, Stancliffe, Stancliffe, Stancliffe, Stancliffe, Stancliffe, Stancliffe, Straniero, Suda, Thompson, Tomkin, Tout, Tsangarides, van Loon, Vassiliadis, Weiss, Weiss   +91 more
core   +1 more source