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Malladi, S. (author), Shen, C. (author), Xu, Q. (author), De Kruijff, T. (author), Yücelen, E. (author), Tichelaar, F. (author), Zandbergen, H. (author)
An approach to carry out chemical reactions using aggressive gases in situ in a transmission electron microscope (TEM), at ambient pressures of 1.5 bar using a windowed environmental cell, called a nanoreactor, is presented here. The nanoreactor coupled with a specially developed holder with platinum tubing permits the usage of aggressive...
journal article 2013
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Tirumalasetty, G.K. (author), Van Huis, M.A. (author), Kwakernaak, C. (author), Sietsma, J. (author), Sloof, W.G. (author), Zandbergen, H.W. (author)
A combination of Electron Back-Scattered Diffraction (EBSD) and high-sensitivity Electron Probe Micro-Analysis (EPMA) was used to correlate the changes in microstructural features upon deformation with local chemical composition in Transformation-Induced Plasticity steels. A novel cleaning procedure was developed that allows complete monitoring...
journal article 2013
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Rudneva, M. (author), Gao, B. (author), Prins, F. (author), Xu, Q. (author), Van der Zant, H.S.J. (author), Zandbergen, H.W. (author)
In situ transmission electron microscopy was performed on the electromigration in platinum (Pt) nanowires (14 nm thick, 200 nm wide, and 300 nm long) with and without feedback control. Using the feedback control mode, symmetric electrodes are obtained and the gap usually forms at the center of the Pt nanowire. Without feedback control,...
journal article 2013
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Rudneva, M. (author), Van Veldhoven, E. (author), Malladi, S.K. (author), Maas, D. (author), Zandbergen, H.W. (author)
In this article, we present novel sample preparation methods using a helium ion microscope (HIM). We report the possibility of reshaping, at room temperature, thin metal lines on an electron-transparent membrane: A set of platinum bridges with standard geometry (300X200X15 nm) was modified at room temperature into different shapes using focused...
journal article 2013
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Dildar, I.M. (author), Boltje, D.B. (author), Hesselberth, M.H.S. (author), Aarts, J. (author), Xu, Q. (author), Zandbergen, H.W. (author), Harkema, S. (author)
We have investigated the properties of interfaces between LaAlO3 films grown on SrTiO3 substrates singly terminated by TiO2. We used RF sputtering in a high-pressure oxygen atmosphere. The films are smooth, with flat surfaces. Transmission electron microscopy shows sharp and continuous interfaces with some slight intermixing. The elemental ratio...
journal article 2013
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Cervone, A. (author), Zandbergen, B. (author), Bouwmester, J. (author), Guo, J. (author)
The Space Systems Engineering department at the Faculty of Aerospace Engineering is hard at work miniaturizing satellite subsystems to accommodate the growing use of small satellites. One of the challenges the department has taken on is research into micro-propulsion. The limitations that come with small satellites make research in this !eld...
journal article 2013
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Zandbergen, H.W. (author)
journal article 2012
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Fang, C.M. (author), Sluiter, M.H.F. (author), Van Huis, M.A. (author), Zandbergen, H.W. (author)
First-principles calculations have been performed for a variety of Ni3X (X = C, N) phases, as well as for NiXy (y = 0 to 1/3) solid solutions to clarify the persistent controversy regarding its magnetic state. The calculations show that the solid solution phases based on hexagonal-close-packed (hcp or ?-) Ni have relatively high stability for X...
journal article 2012
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Tirumalasetty, G.K. (author), Fang, C.M. (author), Xu, Q. (author), Jansen, J. (author), Sietsma, J. (author), Van Huis, M.A. (author), Zandbergen, H.W. (author)
A transmission electron microscopy study was conducted on nanoprecipitates formed in Ti microalloyed transformation-inducedplasticity-assisted steels, revealing the presence of Ti(N), Ti2CS and a novel type of ultra-fine Fe(C) precipitate. The matrix/precipitate orientation relationships, sizes and shapes were investigated in detail. The...
journal article 2012
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Fang, C.M. (author), Van Huis, M.A. (author), Thijsse, B.J. (author), Zandbergen, H.W. (author)
Iron carbides play a crucial role in steel manufacturing and processing and to a large extent determine the physical properties of steel products. The modified embedded atom method (MEAM) in combination with Lee's Fe-C potential is a good candidate for molecular dynamics simulations on larger Fe-C systems. Here, we investigate the stability and...
journal article 2012
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Tirumalasetty, G.K. (author), Van Huis, M.A. (author), Kwakernaak, C. (author), Sietsma, J. (author), Sloof, W.G. (author), Zandbergen, H.W. (author)
Uniaxial straining experiments were performed on a rolled and annealed Si-alloyed TRIP (transformation-induced plasticity) steel sheet in order to assess the role of its microstructure on the mechanical stability of austenite grains with respect to martensitic transformation. The transformation behavior of individual metastable austenite grains...
journal article 2012
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Alan, T. (author), Yokosawa, T. (author), Gaspar, J. (author), Pandraud, G. (author), Paul, O. (author), Creemer, F. (author), Sarro, P.M. (author), Zandbergen, H.W. (author)
Transmission electron microscopy (TEM) of (de-)hydrogenation reactions is crucial to characterize efficiency of hydrogen storage materials. The nanoreactor, a micromachined channel with 15-nm-thick windows, effectively confines the gas flow to an electron-transparent chamber during TEM of reactions. Realistic experiments require very high...
journal article 2012
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Tirumalasetty, G.K. (author), Van Huis, M.A. (author), Fang, C.M. (author), Xu, Q. (author), Tichelaar, F.D. (author), Hanlon, D.N. (author), Sietsma, J. (author), Zandbergen, H.W. (author)
Multiphase steels utilising composite strengthening may be further strengthened via grain refinement or precipitation by the addition of microalloying elements. In this study a Nb microalloyed steel comprising martensite, bainite and retained austenite has been studied. By means of transmission electron microscopy (TEM), we have investigated the...
journal article 2011
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Song, B. (author), Schneider, G.F. (author), Xu, Q. (author), Pandraud, G. (author), Dekker, C. (author), Zandbergen, H. (author)
Extended abstract of a paper presented at Microscopy and Microanalysis 2011 in Nashville, Tennessee, USA, August 7–August 11, 2011.
journal article 2011
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Vendelbo, S.B. (author), Creemer, J.F. (author), Helveg, S. (author), Morana, B. (author), Mele, L. (author), Molenbroek, A.M. (author), Sarro, P.M. (author), Zandbergen, H.W. (author), Kooyman, P.J. (author)
Extended abstract of a paper presented at Microscopy and Microanalysis 2011 in Nashville, Tennessee, USA, August 7–August 11, 2011.
journal article 2011
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Yokosawa, T. (author), Alan, T. (author), Pandraud, G. (author), Dam, B. (author), Zandbergen, H.W. (author)
Extended abstract of a paper presented at Microscopy and Microanalysis 2011 in Nashville, Tennessee, USA, August 7–August 11, 2011.
journal article 2011
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Fang, C.M. (author), Van Huis, M.A. (author), Jansen, J. (author), Zandbergen, H.W. (author)
Although Fe2C and Fe2N are technologically important materials, the exact nature of the chemical bonding of C and N atoms and the related impact on the electronic properties are at present unclear. Here, results of first-principles electronic structure calculations for Fe2X (X = C, N) phases are presented. The electronic structure calculations...
journal article 2011
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Klimczuk, T. (author), Wang, C.H. (author), Lawrence, J.M. (author), Xu, Q. (author), Durakiewicz, T. (author), Ronning, F. (author), Llobet, A. (author), Trouw, F. (author), Kurita, N. (author), Tokiwa, Y. (author), Lee, H. (author), Booth, C.H. (author), Gardner, J.S. (author), Bauer, E.D. (author), Joyce, J.J. (author), Zandbergen, H.W. (author), Movshovich, R. (author), Cava, R.J. (author), Thompson, J.D. (author)
We report extensive measurements on a new compound (Yb0.24Sn0.76)Ru that crystallizes in the cubic CsCl structure. Valence-band photoemission (PES) and L3 x-ray absorption show no divalent component in the 4f configuration of Yb. Inelastic neutron scattering (INS) indicates that the eight-fold degenerate J-multiplet of Yb3+ is split by the...
journal article 2011
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Qin, Y.L. (author), Zandbergen, H.W. (author)
journal article 2010
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Van Veldhoven, E. (author), Sidorkin, V. (author), Chen, P. (author), Alkemade, P. (author), Van der Drift, E. (author), Salemink, H. (author), Zandbergen, H. (author), Maas, D. (author)
journal article 2010
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