Zobrazeno 1 - 10
of 137
pro vyhledávání: '"Bernd Kieback"'
Publikováno v:
Crystals, Vol 7, Iss 9, p 271 (2017)
The solid-state reaction of WO3 with W was studied in order to clarify the phase formation in the binary system W-O around the composition WOx (2.50 ≤ x ≤ 3) during spark plasma sintering (SPS). A new phase “WO2.82” is observed in the range 2
Externí odkaz:
https://doaj.org/article/e0f18f241db44172976795e571ee9965
Autor:
Oliver Eberhardt, Artem S. Semenov, Michael Nöthe, Johannes Trapp, Thomas Wallmersperger, Bernd Kieback
Publikováno v:
Computational Mechanics. 67:1395-1407
In the present research, a numerical modeling approach of the initial stage of consolidation during spark plasma sintering on the microscopic scale is presented. The solution of a fully coupled thermo-electro-mechanical problem also accounting for gr
Autor:
Reinhard Krause-Rehberg, Thomas Schubert, Danny Petschke, Torsten E.M. Staab, Alaa M. Ibrahim, Uwe Mühle, Frank Lotter, Mohamed Elsayed, Bernd Kieback
Publikováno v:
Journal of Materials Science. 56:8717-8731
Aluminium-copper alloys of the 2xxx type receive their excellent mechanical properties by the formation of copper-rich precipitates during hardening. Size, distribution and crystal structure of the formed precipitates determine the final strength of
Autor:
Thomas Rauscher, Bernd Kieback, Lars Röntzsch, Christian Immanuel Bernäcker, Marcus Vogt, Stefan Loos
Publikováno v:
Electrochimica Acta. 317:128-138
Porous electrodes for alkaline water electrolysis were prepared by spark plasma sintering, a short-time sintering technique, in combination with a space holder method. After removal of the space holders, highly porous layers of polycrystalline Ni and
Autor:
Johannes Trapp, Bernd Kieback
Publikováno v:
Powder Metallurgy. 62:297-306
In this study, the evolution of the electrical resistivity of metal powders during densification and the resulting current flow through punch, powder compact, and die is investigated. The e...
Publikováno v:
Journal of Nuclear Materials. 518:1-10
Although the view that nm-sized oxide particles modify and essentially improve the irradiation resistance of Fe-Cr-based alloys is widely accepted, the correctness of this view has only been demonstrated in singular cases. An extension of the field o
Publikováno v:
International Journal of Hydrogen Energy. 44:6392-6402
Nanocrystalline Nickel-based alloys were investigated as catalysts for the oxygen evolution reaction (OER) at industrial operation conditions for alkaline water electrolysis. Different alloys were prepared by rapid solidification and subsequent high-
Publikováno v:
Progress in Additive Manufacturing. 4:383-397
The quality of powder used in powder bed-based additive manufacturing plays a key role concerning process performance and end part properties. Even though this is a generally accepted fact, there is still a lack of a comprehensive understanding of th
Autor:
T. E. M. Staab, T. Schubert, Reinhard Krause-Rehberg, Uwe Mühle, Bernd Kieback, Markus Löffler
Publikováno v:
Practical Metallography. 56:22-33
For the assessment of the precipitation state in aluminum-based alloys by transmission electron microscopy (TEM), the sample must have an orientation in the [100] direction of the matrix. TEMs equipped with objective lenses that are optimized for hig
Publikováno v:
Journal of The Electrochemical Society
A powder metallurgy route is described as a promising route to produce highly active Raney-Ni electrodes. An expanded Ni mesh was used as metallic substrate on the surface of which Raney-Ni phases were produced via a heat-treatment step using Al powd