Searched for: author:"Janssen, G.C.A.M."
(1 - 18 of 18)
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Gkouzou, A. (author), Kokorian, J. (author), Janssen, G.C.A.M. (author), van Spengen, W.M. (author)
In this paper, we report on the influence of capillary condensation on the sliding friction of sidewall surfaces in polycrystalline silicon micro-electromechanical<br/>systems (MEMS). We developed a polycrystalline silicon MEMS tribometer, which is a microscale test device with two components subject to sliding contact. One of the components can...
journal article 2017
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Liu, Y. (author), Janssen, G.C.A.M. (author)
The wear of pipelines, used in slurry transport, results in high costs for maintenance and replacement. The wear mechanism involves abrasion, corrosion, impact, and the interaction among them. In this work, we study the effect of impact on the wear mechanism and wear rate. Results show that when the effect of impact is small, the wear mechanism...
journal article 2017
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Liu, Y. (author), Mol, J.M.C. (author), Janssen, G.C.A.M. (author)
The aluminium alloy 7075-T6 is widely used in engineering. In some applications, like slurry transport, corrosion and abrasion occur simultaneously, resulting in early material failure. In the present work, we investigated the combined effect of corrosion and wear on the aluminium alloy 7075-T6. We performed two series of wear experiments to...
journal article 2016
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Gkouzou, A. (author), Kokorian, J. (author), Janssen, G.C.A.M. (author), van Spengen, W.M. (author)
In this work, we have incorporated heaters in a MEMS device, which allow the in situ local heating of its contacting surfaces. This design offers a promising solution for MEMS devices with contacting components by preventing capillary-induced adhesion. The force of adhesion was assessed by optically measuring in-plane snap-off displacements. We...
journal article 2016
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Klaver, T.P.C. (author), Zhu, S. (author), Sluiter, M.H.F. (author), Janssen, G.C.A.M. (author)
journal article 2015
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Dai, S (author), Ma, Q (author), Zhu, S. (author), Liu, Mengkun (author), Andersen, T (author), Fei, Z (author), Goldflam, MD (author), Wagner, M (author), Watanabe, Kenji (author), Taniguchi, T (author), Thiemens, M (author), Keilmann, F (author), Janssen, G.C.A.M. (author), Jarillo-Herrero, P (author), Fogler, MM (author), Basov, DN (author)
abstract 2015
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Calado, V.E. (author), Zhu, S.E. (author), Goswami, S. (author), Xu, Q. (author), Watanabe, K. (author), Taniguchi, T. (author), Janssen, G.C.A.M. (author), Vandersypen, L.M.K. (author)
In this letter, we report the observation of ballistic transport on micron length scales in graphene synthesised by chemical vapour deposition (CVD). Transport measurements were done on Hall bar geometries in a liquid He cryostat. Using non-local measurements, we show that electrons can be ballistically directed by a magnetic field (transverse...
journal article 2014
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Zhu, S. (author), Janssen, G.C.A.M. (author)
patent 2013
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Zhu, S.E. (author), Ghatkesar, M.K. (author), Zhang, C. (author), Janssen, G.C.A.M. (author)
We present a pressure sensor based on the piezoresistive effect of graphene. The sensor is a 100?nm thick, 280??m wide square silicon nitride membrane with graphene meander patterns located on the maximum strain area. The multilayer, polycrystalline graphene was obtained by chemical vapor deposition. Strain in graphene was generated by applying...
journal article 2013
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Pujada, B.R. (author), Tichelaar, F.D. (author), Arnoldbik, W.M. (author), Sloof, W.G. (author), Janssen, G.C.A.M. (author)
Growth stress in tungsten carbide-diamond-like carbon coatings, sputter deposited in a reactive argon/acetylene plasma, has been studied as a function of the acetylene partial pressure. Stress and microstructure have been investigated by wafer curvature and transmission electron microscopy (TEM) whereas composition and energy distribution...
journal article 2009
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Janssen, G.C.A.M. (author)
public lecture 2007
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Pujada, B.R. (author), Tichelaar, F.D. (author), Janssen, G.C.A.M. (author)
Tungsten carbide-diamond like carbon (WC-DLC) multilayer coatings have been prepared by sputter deposition from a tungsten-carbide target and periodic switching on and off of the reactive acetylene gas flow. The stress in the resulting WC-DLC multilayers has been studied by substrate curvature. Periodicity and microstructure have been studied by...
journal article 2007
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Kamminga, J.D. (author), Janssen, G.C.A.M. (author)
journal article 2007
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Janssen, G.C.A.M. (author), Tichelaar, F.D. (author), Visser, C.C.G. (author)
Stress in hard films is the net sum of tensile stress generated at the grain boundaries, compressive stress due to ion peening, and thermal stress due to the difference in thermal expansion of the coating and substrate. The tensile part due to grain boundaries is thickness dependent. The other two contributions are not thickness dependent....
journal article 2006
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Grachev, S.Y. (author), Tichelaar, F.D. (author), Janssen, G.C.A.M. (author)
We studied the tensile stress and grain-width evolution in sputter-deposited Cr films with thickness from 20?nm to 2.7??m. Films were deposited in an industrial Hauzer 750 physical vapor deposition machine at 50–80?°C. The films exhibited a columnar microstructure. A power law behavior of the tensile stress as well as of the average grain width...
journal article 2005
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Janssen, G.C.A.M. (author), Kamminga, J.D. (author)
In the absence of thermal stress, tensile stress in hard metal films is caused by grain boundary shrinkage and compressive stress is caused by ion peening. It is shown that the two contributions are additive. Moreover tensile stress generated at the grain boundaries does not relax by ion bombardment. In polycrystalline hard metal films the grain...
journal article 2004
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Janssen, G.C.A.M. (author), Dammers, A.J. (author), Sivel, V.G.M. (author), Wang, W.R. (author)
Thin films on substrates are usually in a stressed state. An important, but trivial, contribution to that stress stems from the difference in thermal expansion coefficient of substrate and film. Much more interesting are the intrinsic stresses, resulting from the growth and/or microstructure of the film. Intrinsic compressive stress was...
journal article 2003
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van der Kraan, R.G.P. (author), Jongste, J.F. (author), Jaeger, H.M. (author), Janssen, G.C.A.M. (author), Radelaar, S. (author)
journal article 1991
Searched for: author:"Janssen, G.C.A.M."
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