Results 31 to 40 of about 105,644 (294)

Robust Spot Melting by 3D Spot Arrangements in Electron Beam Powder Bed Fusion

open access: yesAdvanced Engineering Materials, EarlyView.
This work proposes an approach to replace separately melted contours for spot melting in electron beam powder fusion. Adapting the spot arrangements close to the contour combined with stacking yields a comparable surface quality without the inherent challenges of separate contours, as demonstrated, by electron optical images and roughness measurements.
Tobias Kupfer   +4 more
wiley   +1 more source

Testimonios del mercader Hans Tetzel (1518-1571) de Núremberg en Cuba: Un análisis histórico y socio-lingüístico

open access: yesIslas, 2023
Introducción: El objetivo de este trabajo es mostrar las circunstancias históricas de esta empresa con un enfoque en las relaciones entre Núremberg y Cuba, la formación de Hans Tetzel y las posibilidades de estudiar una lengua extranjera (el español) en ...
Roger Schöntag
doaj  

Parameter Variation in Planetary Ball Milling of Titanium Aluminide Powder in XHV‐Adequate Atmosphere

open access: yesAdvanced Engineering Materials, EarlyView.
This study investigates the effects of milling parameters, including rotational speed, milling duration, and ball‐to‐powder ratio, on TiAl particle size and morphology in an XHV‐equivalent atmosphere. The creation of oxide‐free surfaces enhances the mechanical properties of green bodies.
Jytte Möckelmann   +4 more
wiley   +1 more source

Construction and Demolition Residuals as Raw Materials for the Production of Novel Geopolymer Building Materials

open access: yesCrystals, 2022
The increasing number of new construction projects requiring high-quality building products, which, in turn, emit enormous amounts of CO2, runs counter to European and global climate goals.
Felix Kugler   +3 more
doaj   +1 more source

Creep Properties and Deformation Mechanism of Additively Manufactured NiAl‐CrMo Composites

open access: yesAdvanced Engineering Materials, EarlyView.
Additively manufactured NiAl‐CrMo composites contain numerous interfaces and cell boundaries that control their creep response. At 700°C under high applied stress, creep is dominated by dislocation‐controlled power‐law mechanisms. At 800°C–900°C and lower stresses, creep is primarily diffusion‐controlled along cell boundaries.
Jan Vollhüter   +9 more
wiley   +1 more source

The ‘unequalled artist and architect Senior Anthonio, il maltese’, pioneer of Renaissance architecture and military engineering in Europe [PDF]

open access: yes, 2015
In the 1530s and 1540s the Maltese architect and military engineer Antonio (‘Fauczun’, ‘Anthoni Faissant’) signed responsible for the construction of several prestigious fortifications, fortresses, public edifices, and palaces in the German towns of ...
Freller, Thomas
core  

Competent children?: minors’ consent to health care treatment and research [PDF]

open access: yes, 2007
This paper concentrates on controversies about children's consent, and reviews how children's changing status as competent decision makers about healthcare and research has gradually gained greater respect.
Alderson, Priscilla
core   +3 more sources

NanoMOF‐Based Multilevel Anti‐Counterfeiting by a Combination of Visible and Invisible Photoluminescence and Conductivity

open access: yesAdvanced Functional Materials, EarlyView.
This study presents novel anti‐counterfeiting tags with multilevel security features that utilize additional disguise features. They combine luminescent nanosized Ln‐MOFs with conductive polymers to multifunctional mixed‐matrix membranes and powder composites. The materials exhibit visible/NIR emission and matrix‐based conductivity even as black bodies.
Moritz Maxeiner   +9 more
wiley   +1 more source

A Universal Interfacial Dipole Strategy for Defect Suppression in Inverted Perovskite Solar Cells With Tunable Bandgaps

open access: yesAdvanced Functional Materials, EarlyView.
A 2D heterointerface with a two‐site anchor bridge suppresses nonradiative recombination at the perovskite/C₆₀ interface by reducing surface defects, elevating the Fermi level, and strengthening the electric field. This strategy enables efficient electron extraction, delivering 26.32% efficiency, 1.217 V Voc, excellent operational stability, and broad ...
Chaohui Li   +27 more
wiley   +1 more source

A Neutral “Masked” Diborene and Its Reactivity Toward Metal‐Free Pyridine Homocoupling

open access: yesAngewandte Chemie, EarlyView.
An unprecedented neutral “masked” diborene, formed via intramolecular arene dearomatization of an N‐heterocyclic imine‐supported free diborene, can be photochemically released to regenerate the highly reactive triplet diborene intermediate. Computational analysis elucidates the bonding situation of the hitherto elusive free diborene species, and the ...
Ke Li   +4 more
wiley   +2 more sources

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