Results 111 to 120 of about 498,478 (298)

Development and Validation of a One‐Dimensional Finite Difference Simulation Scheme for Polymer Laser Powder Bed Fusion with Application to the Effect of the Inter Layer Time

Advanced Engineering Materials, EarlyView.
The study presents an efficient simulation approach for the polymer laser powder bed fusion process polymers process, validated with polyamide 12, polyamide 6, and polyetherketoneketone. It shows that inter layer time affects part density, with 90s yielding dense parts.
Claas Bierwisch, Bastien Dietemann, Moritz Grünewald, Christian Schlör, Johannes Rudloff   +4 more
wiley   +1 more source

Combined modelling of shortwave and thermal radiation for one-imensional SVATs [PDF]

Hydrology and Earth System Sciences, 1999
Expressions for the upwelling and downwelling fluxes of optical and thermal radiation between soil, vegetation and the sky are derived, under certain simple assumptions.
D. Pearson, C. C. Daamen, R. J. Gurney, L. P. Simmonds   +3 more
doaj  

Development of Ternary Magnesium Alloys for Laser Powder Bed Fusion: Optimizing Oxide Layer Thickness

Advanced Engineering Materials, EarlyView.
Additive manufacturing of magnesium alloys by laser is difficult because the melting point of the oxide layer is much higher than the evaporation temperature of the metal underneath. Making the oxide layer thinner can solve this problem. Alloying magnesium with strontium makes the oxide layer thinner, especially at 0.5 wt%.
Elmar Jonas Breitbach, Stefan Julmi, Sabine Behrens, Tatiana Blank, Arvid Abel, Nicole Emminghaus, Ludger Overmeyer, Christian Klose, Hans Jürgen Maier   +8 more
wiley   +1 more source

Ultra‐Shallow Flat Heat Waves on Low Thermal Conductivity Flexible Polyimide Substrate for Millisecond Thermal Analysis of Materials and Bioelectronic Applications

Advanced Engineering Materials, EarlyView.
An electronic system is presented consisting of a silver thin‐film electrode on a polyimide substrate working both as a heating element and a resistive temperature sensor, generating millisecond heat pulses with very fast heating and cooling rates and a flat peak temperature with a tunable duration.
Bahman K. Boroujeni, Jan Frede, Simon T. Herrmann, Natalie Heinen, Hans Kleemann, Stephanie Pfaender   +5 more
wiley   +1 more source

On the Angular Variation of Solar Reflectance of Snow [PDF]

Spectral and integrated solar reflectance of nonhomogeneous snowpacks were derived assuming surface reflection of direct radiation and subsurface multiple scattering.
Chang, A. T. C., Choudhury, B. J.
core   +1 more source

Metal organic frameworks derived core-shell structured C@TiC nanocomposites with excellent microwave absorption performance

Open Ceramics
With aim to prepare nano-microwave absorption material with excellent microwave absorption performance, core-shell structured C@TiC nanocomposites with tunable nanostructures and morphologies were successfully synthesized through one-step pyrolysis of ...
Yan Wang, Zhihe Xiao, Jian Gu, Weibin Sun, Junyang Jin, Xin Sun   +5 more
doaj  

Non‐Destructive and Mechanical Characterization of the Bond Quality of Co‐Extruded Titanium‐Aluminum Profiles

Advanced Engineering Materials, EarlyView.
This study investigates the bond quality of co‐extruded aluminum–titanium hybrid profiles, focusing on the lateral angular co‐extrusion (LACE) process. It examines how heat treatments (HT) affect intermetallic phase formation, bond strength, and material properties.
Norman Mohnfeld, Ahmed Dewidar, Karim Qarbi, Hendrik Wester, Florian Patrick Schäfke, Alexej Verschinin, Hans Jürgen Maier, Sebastian Barton, Christian Klose, Johanna Uhe   +9 more
wiley   +1 more source

Active-passive compound metasurface for simultaneously manipulating radiation and scattering in a wide band

Materials & Design, 2023
Metasurfaces, which are usually passive or non-radiating, have provided unprecedented degree of freedom especially for scattering manipulation. For the manipulating radiation, metasurfaces often serve as auxiliaries to radiators since they cannot radiate
Xinmin Fu, Jie Yang, Jiafu Wang, Yuxiang Jia, Zhenxu Wang, Yajuan Han, Hongya Chen, Juanna Jiang, Chang Ding, Yongfeng Li, Shaobo Qu   +10 more
doaj  

Development of a Novel Processing Route for Dispersoid/Precipitation‐Strengthened High Conductive Copper Alloys by Using Metalized Nanoceramics in Additive Manufacturing

Advanced Engineering Materials, EarlyView.
This study explores a process chain to produce dispersoid‐strengthened CuCr1Zr for applications requiring high strength and conductivity. Using gas‐atomized powder and copper‐plated alumina nanoparticles, additive manufacturing is performed via powder bed based additive manufacturing with green and red lasers, followed by heat treatment.
Heinrich von Lintel, Abdelrahman Elsayed, Lukas Mielewczyk, Katja Eichmann, Julia Grothe, Ulrich Krupp, Avinash Hariharan, Katrin Jahns   +7 more
wiley   +1 more source

A common origin of all the species of high-energy cosmic rays? [PDF]

, 1999
Cosmic ray nuclei, cosmic ray electrons with energy above a few GeV, and the diffuse gamma-ray background radiation (GBR) above a few MeV, presumed to be extragalactic, could all have their origin or residence in our galaxy and its halo.
Antoniou, Nikos, Dar, Arnon, De Rújula, A.   +2 more
core   +1 more source