Zobrazeno 1 - 10
of 31
pro vyhledávání: '"S. I.-U. Ahmed"'
Autor:
S. I.-U. Ahmed, B. Guddei
Publikováno v:
Tribology Letters. 51:219-226
This paper reports on the dependence of rolling resistance on surface roughness of single balls in a flat-ball-flat configuration at sub-Newton loads using an specially designed rolling resistance tribometer. The tribometer setup features an ultra-st
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::66ef5f7e1b6df3f4ababbefe50373757
https://doi.org/10.1007/s11249-013-0127-9
https://doi.org/10.1007/s11249-013-0127-9
Publikováno v:
Tribology International. 56:81-88
This article reports on a newly developed reciprocating microtribometer for evaluating the tribological performance of materials and coatings in vacuum and controllable atmospheres on the micro- and milli-Newton scale. The microtribometer consists of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3e532c42b1bf67b4b31caf2558ac3038
https://doi.org/10.1016/j.triboint.2012.06.019
https://doi.org/10.1016/j.triboint.2012.06.019
Autor:
Wichard J. D. Beenken, Thomas Haensel, Pierre Lorenz, S. I.-U. Ahmed, Markus Reinmöller, Stefan Krischok
Publikováno v:
Cellulose. 19:1005-1011
In this report, X-ray induced photoelectron spectroscopy (XPS) measurements of the valence band structure of cellulose and lignin are combined with a theoretical reconstruction of the spectra based on density functional theory (DFT) calculations. The
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::79f84180f14fa28729412b10721978c4
https://doi.org/10.1007/s10570-012-9681-9
https://doi.org/10.1007/s10570-012-9681-9
Autor:
Mikhail Kosinskiy, Juergen A. Schaefer, Rostyslav Mastylo, M. Gubisch, S. I.-U. Ahmed, Lothar Spiess, Y. Liu
Publikováno v:
Tribology Letters. 44:89-98
This article reports on the tribological performance of a WC/C multilayer coating with a periodicity WC/C = 15/5 nm deposited on bearing steel substrates. These substrates were initially polished to achieve different RMS roughness values ranging from
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::876868232970d8b31de622667a1bbd83
https://doi.org/10.1007/s11249-011-9826-2
https://doi.org/10.1007/s11249-011-9826-2
Publikováno v:
Tribology Transactions. 53:280-287
Many insects, such as flies, ants, and bugs, and some animals, such as tree frogs, have proven able to run up and down on smooth vertical surfaces using their specialized pads via a wet adhesive mechanism. Although many meniscus adhesion models were
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b9541e2911b9e39adca1613c9f890834
https://doi.org/10.1080/10402000903402678
https://doi.org/10.1080/10402000903402678
Autor:
Marcel Himmerlich, Anja Eisenhardt, Roland J. Koch, Juergen A. Schaefer, S. I.-U. Ahmed, V. M. Polyakov, K. Kloeckner, Stefan Krischok, Thomas Haensel
Publikováno v:
physica status solidi c. 7:173-176
We studied InN (0001) grown by plasma assisted molecular beam epitaxy (PAMBE) with high-resolution electron energy-loss spectroscopy (HREELS) after vacuum transfer thus avoiding any further surface preparation. We were able to detect for the first ti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5dd00545992676a05bca95ae67877d95
https://doi.org/10.1002/pssc.200982494
https://doi.org/10.1002/pssc.200982494
Publikováno v:
physica status solidi c. 7:394-397
Using high resolution electron energy loss spectroscopy (HREELS) in conjunction with low energy electron diffraction (LEED) and X-ray induced photoelectron spectroscopy (XPS), we have studied surface reconstructions from Si-rich to C-rich surfaces up
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6a9b612e85af113003a205aaa6b1ce81
https://doi.org/10.1002/pssc.200982481
https://doi.org/10.1002/pssc.200982481
Autor:
Jens Uhlig, Juergen A. Schaefer, S. I.-U. Ahmed, Jose A. Garrido, Doris Steinmüller-Nethl, Roland J. Koch, Thomas Haensel, Martin Stutzmann
Publikováno v:
physica status solidi (a). 206:2022-2027
Nanocrystalline diamond (NCD) films are of great importance for many applications. They can be implemented as transparent protective coatings or for the use in electronic devices, sensor systems, and bioelectronic systems. In many applications the su
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::190f1c8ff589d8948de16428dc093190
https://doi.org/10.1002/pssa.200982202
https://doi.org/10.1002/pssa.200982202
Publikováno v:
Science Bulletin. 54:1648-1654
Some insects and animals, such as bugs, grasshoppers and tree frogs, realize their efficient adhesion mechanism to glass surface, wall and ceiling by injecting a wetting liquid thin film into the pad-substrate contact area. Their ability to control a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::59de5b95f6c00e559504ff0a444fe329
https://doi.org/10.1007/s11434-009-0234-z
https://doi.org/10.1007/s11434-009-0234-z
Publikováno v:
Wear. 265:497-506
This study reports on the friction and wear behaviour of nanoscaled pyramidal surface features of chromium nitride thin films in relation to the dimensions of those features. The pyramidal features were created, and their size controlled, by PVD base
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::58fa7c13c44c8f0cef737135ec960b77
https://doi.org/10.1016/j.wear.2007.11.017
https://doi.org/10.1016/j.wear.2007.11.017