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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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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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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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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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- Zandbergen, H.W. (author), Song, B. (author), Rudneva, M. (author), Van Huis, M.A. (author) journal article 2010
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Fang, C.M. (author), Sluiter, M.H.F. (author), Van Huis, M.A. (author), Ande, C.K. (author), Zandbergen, H.W. (author)A long-standing challenge in physics is to understand why cementite is the predominant carbide in steel. Here we show that the prevalent formation of cementite can be explained only by considering its stability at elevated temperature. A systematic highly accurate quantum mechanical study was conducted on the stability of binary iron carbides....journal article 2010
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Giang, N. (author), Xu, Q. (author), Hor, Y.S. (author), Williams, A.J. (author), Dutton, S.E. (author), Zandbergen, H.W. (author), Cava, R.J. (author)The structural misfit compound (PbSe)1.16(TiSe2)2 is reported. It is a superconductor with a Tc of 2.3 K. (PbSe)1.16(TiSe2)2 derives from a parent compound, TiSe2, which shows a charge-density wave transition and no superconductivity. The crystal structure, characterized by high-resolution electron microscopy and powder x-ray diffraction,...journal article 2010
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Van den Hout, M. (author), Hall, A.R. (author), Wu, M.Y. (author), Zandbergen, H.W. (author), Dekker, C. (author), Dekker, N.H. (author)Solid-state nanopores are considered a promising tool for the study of biological polymers such as DNA and RNA, due largely to their flexibility in size, potential in device integration and robustness. Here, we show that the precise shape of small nanopores (?5 nm diameter in 20 nm SiN membranes) can be controlled by using transmission electron...journal article 2010
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Superconductivity in CuxBi2Se3 and its Implications for Pairing in the Undoped Topological InsulatorHor, Y.S. (author), Williams, A.J. (author), Checkelsky, J.G. (author), Roushan, P. (author), Seo, J. (author), Xu, Q. (author), Zandbergen, H.W. (author), Yazdani, A. (author), Ong, N.P. (author), Cava, R.J. (author)Bi2Se3 is one of a handful of known topological insulators. Here we show that copper intercalation in the van der Waals gaps between the Bi2Se3 layers, yielding an electron concentration of ?2×1020??cm-3, results in superconductivity at 3.8 K in CuxBi2Se3 for 0.12?x?0.15. This demonstrates that Cooper pairing is possible in Bi2Se3 at accessible...journal article 2010