Results 141 to 150 of about 625,210 (358)

Synthesis and characterization of tungsten trioxide powders prepared from tungstic acids [PDF]

WO3 powders were prepared by the thermal decomposition of tungstic acids (WO3 nH2O, n ¼ 1/3, 1, 2). The tungstic acids were synthesized from WO4 2 aqueous solutions under a variety of conditions of pH, temperature and W(VI) concentrations.
Ana M.V. Cavaleiro, Antonik, Badilescu, Bange, Barraclough, Doremieux-Morin, Freedman, Genzel, Gerand, Gerand, Hattori, Hayashi, Helena I.S. Nogueira, João Rocha, Júlio D.Pedrosa de Jesus, Krebs, LeGore, Lu, Maruyama, Nedjar, Pitsyuga, Ramis, Regragui, Santato, Serna, Serna, Tanisaki, Tito Trindade, Wang   +28 more
core   +2 more sources

Influence of a Hydrogen Addition to the Inert Gas and Subsequent Heat Treatments on the Microstructure and Mechanical Properties of Magnesium WE43 Fabricated by PBF‐LB/M

Advanced Engineering Materials, EarlyView.
This article investigates optimal processing conditions for the laser‐based powder bed fusion of WE43. To limit the interaction with remaining oxygen, a 3 vol% hydrogen admixture to the inert gas is investigated. Furthermore, heat treatments are investigated in the range of 250–350 °C for 48 h.
Arvid Abel, Elmar Jonas Breitbach, Hannes Holländer, Michael Müller, Tjorben Griemsmann, Christian Klose, Jörg Hermsdorf, Hans Jürgen Maier, Stefan Kaierle, Ludger Overmeyer   +9 more
wiley   +1 more source

Correlative Multi-Scale Characterization of Nanoparticles Using Transmission Electron Microscopy

Powders
Chemical and physical properties of nanoparticles (NPs) are strongly influenced not only by the crystal structure of the respective material, including crystal structure defects but also by the NP size and shape.
Stefan Neumann, David Rafaja
doaj   +1 more source

Combined thermal and particle shape effects on powder spreading in additive manufacturing via discrete element simulations [PDF]

arXiv
The thermal and mechanical behaviors of powders are important for various additive manufacturing technologies. For powder bed fusion, capturing the temperature profile and the packing structure of the powders prior to melting is challenging due to both the various pathways of heat transfer and the complicated properties of powder system.
arxiv  

Enhancing the Age‐Hardening Response of Laser Powder‐Bed Fusion WE43 Alloy through Microstructural Control

Advanced Engineering Materials, EarlyView.
Laser powder‐bed fusion (L‐PBF) can produce dense WE43 magnesium alloy parts, but their mechanical properties are limited by a nonhomogeneous microstructure. This study investigates the effects of varying direct aging (T5) and artificial age‐hardening (T6) conditions on microstructure and strength. Optimized T6 treatment significantly improves strength
Prathviraj Upadhyaya, Sinéad M. Uí Mhurchadha, Oliver J. McCarthy, Tríona Kennedy, Mert Celikin, Ramesh Raghavendra   +5 more
wiley   +1 more source

Toward Multi-Dimensional Separation of Nanoparticles in Tubular Centrifuges

Powders
The processing and preparation of particulate products is an important process in modern industry and science. The enormous potential for innovation in research and development is due to the complex interactions of solids with their environment.
Marvin Winkler, Marco Gleiss, Hermann Nirschl   +2 more
doaj   +1 more source

Chemical reactions of metal powders with organic and inorganic liquids during ball milling [PDF]

Chromium and/or nickel powders were milled in metal chlorides and in organic liquids representative of various functional groups. The powders always reacted with the liquid and became contaminated with elements from them.
Arias, A.
core   +1 more source

Direct Consolidation of Copper–Graphene Composite by Rotary Swaging

Advanced Engineering Materials, EarlyView.
The applicability of the rotary swaging method for preparation of electroconductive copper–graphene composite by direct consolidation of powders is proven. The consolidated material features advantageous microstructure featuring fine grains and twins, with homogeneous distribution of graphene, primarily along the twin boundaries, which contribute to ...
Radim Kocich, Lenka Kunčická, Pavel Czernek   +2 more
wiley   +1 more source

Multidimensional In Situ Characterization of Surface and Free Nanobubbles in Oxidic Nanofluids

Powders
The efficiency of froth flotation drastically drops towards ultrafine particles. Some improvements may be possible using smaller bubbles and high degrees of turbulence, however, reaching their limits in the nanometer particle range.
Annett Wollmann, Bernd Benker, Vinzent Olszok, Alfred P. Weber   +3 more
doaj   +1 more source

THE TECHNOLOGY FORECASTING OF NEW MATERIALS: THE EXAMPLE OF NANOSIZED CERAMIC POWDERS [PDF]

New materials have been recognized as significant drivers for corporate growth and profitability in today’s fast changing environments. The nanosized ceramic powders played important parts in new materials field nowadays. However, little has been done in
Chen, Chia-Yon, Cheng, An-Chin
core