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Santos, Janaina S. (author), Márquez, Victor (author), Buijnsters, J.G. (author), Praserthdam, Supareak (author), Praserthdam, Piyasan (author)This study presents environmentally friendly and low-cost synthetic routes to produce antimicrobial coatings over 5052 Al alloy based on plasma electrolytic oxidation (PEO) technology. Two methodologies were explored: the decoration with copper and anodic doping with copper ions. The porous oxide layers produced in silicate media presented...journal article 2023
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Ding, Z. (author), Brouwer, J.C. (author), Kwakernaak, C. (author), Hermans, M.J.M. (author), Popovich, V. (author), Quadakkers, Willem J. (author), Sloof, W.G. (author)Mo(Al<sub>x</sub>Si<sub>1-x</sub>)<sub>2</sub> alloy with x in the range of 0.35–0.65 were prepared by a one-step spark plasma sintering. To study the exclusive formation of an α-Al<sub>2</sub>O<sub>3</sub> scale, oxidation experiments were conducted in low and high oxygen partial pressure ambient at 1373 K; viz.: 10<sup>−14</sup> and 0.21...journal article 2023
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Ding, Z. (author), Brouwer, J.C. (author), Kwakernaak, C. (author), Zhu, Jia-Ning (author), Popovich, V. (author), Hermans, M.J.M. (author), Sloof, W.G. (author)To prevent premature triggering of the healing reaction in Mo-Si containing self-healing thermal barrier coating system, an oxygen impenetrable shell (α-Al<sub>2</sub>O<sub>3</sub>) around the sacrificial healing particles (MoSi<sub>2</sub>) is desired. Here an encapsulation method is presented through selective oxidation of Al in Mo(Al<sub>x...journal article 2023
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Chen, M. (author), Heijman, Sebastiaan (author), Luiten-Olieman, Mieke W.J. (author), Rietveld, L.C. (author)Ceramic membranes have drawn increasing attention in oily wastewater treatment as an alternative to their traditional polymeric counterparts, yet persistent membrane fouling is still one of the largest challenges. Particularly, little is known about ceramic membrane fouling by oil-in-water (O/W) emulsions in constant flux filtration modes. In...journal article 2022
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van Gog, H. (author)Aluminum hydrate dehydration interfaces were studied using a van der Waals density functional. The interface configurations investigated here as a first exploration of possible interface geometries, were all found to have a reasonable probability of occurring. From gibbsite/boehmite and boehmite/γ-Al<sub>2</sub>O<sub>3</sub> interface...journal article 2021
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Guatame-Garcia, Adriana (author), Buxton, M.W.N. (author)In response to the growing demand for sustainable products and services, the kaolin calcination industry is developing practices that optimise the use of resources. The main challenges include more efficient use of raw materials and a reduction in the energy consumed by the calcination furnace. An opportunity to achieve this lies in the...journal article 2020
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Leaching characteristics and mechanism of the synthetic calcium-aluminate slags for alumina recoveryAzof, Fabian Imanasa (author), Yang, Y. (author), Panias, Dimitrios (author), Kolbeinsen, Leiv (author), Safarian, Jafar (author)The leaching characteristics and mechanism of synthetic CaO-Al <sub>2</sub> O <sub>3</sub> slags in alkaline solution at atmospheric pressure have been studied. The purpose of the study is to have a better understanding of the leaching part of the Pedersen process, as an alternative to the Bayer process for alumina production. The...journal article 2019
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Zhang, Di (author), La Zara, D. (author), Quayle, Michael J. (author), Petersson, Gunilla (author), van Ommen, J.R. (author), Folestad, Staffan (author)The morphology, size, and surface properties of pharmaceutical particles form an essential role in the therapeutic performance of active pharmaceutical ingredients (APIs) and excipients as constituents in various drug delivery systems and clinical applications. Recent advances in methods for surface modification, however, rely heavily on...journal article 2019
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Guatame-Garcia, Adriana (author), Buxton, M.W.N. (author), Deon, F. (author), Lievens, Caroline (author), Hecker, Chris (author)In the production of calcined kaolin, the on-line monitoring of the calcination reaction is becoming more relevant for the generation of optimal products. In this context, this study aimed to assess the suitability of using infrared (IR) spectroscopy as a potential technique for the on-line characterization of the<br/>calcination of kaolin. The...journal article 2018
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Prodanovic, V. (author), Chan, H.W. (author), van der Graaf, H. (author), Sarro, Pasqualina M (author)In this paper we demonstrate the fabrication of large arrays of ultrathin freestanding membranes (tynodes) for application in a timed photon counter (TiPC), a novel photomultiplier for single electron detection. Low pressure chemical vapour deposited silicon nitride (Si <sub>x</sub> N <sub>y</sub> ) and atomic layer deposited alumina (Al<sub...journal article 2018
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Carabat, A.L. (author), Meijerink, M.J. (author), Brouwer, J.C. (author), Kelder, E.M. (author), van Ommen, J.R. (author), van der Zwaag, S. (author), Sloof, W.G. (author)A successful sol-gel process to encapsulate molybdenum di-silicide MoSi<sub>2</sub> particles with a closed and thermally stable Al<sub>2</sub>O<sub>3</sub> layer using aluminium tri-sec-butoxide as a precursor is presented. The processing conditions such as precursor selection and temperature were optimized through analysing the interaction...journal article 2018
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Boatemaa, L. (author), van der Zwaag, S. (author), Sloof, W.G. (author)This work explores the possibility of using embedded micron-sized Ti particles to heal surface cracks in alumina and to unravel the evolution of the crack filling process in case of pure solid-state oxidation reactions. The oxidation kinetics of the Ti particles is studied and the results are applied in a simple model for crack-gap filling....journal article 2018
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Boatemaa, L. (author), Bosch, Myrthe (author), Farle, A.M. (author), Bei, G. (author), van der Zwaag, S. (author), Sloof, W.G. (author)In this work, the oxidation-induced crack healing of Al<sub>2</sub>O<sub>3</sub> containing 20 vol.% of Ti<sub>2</sub>AlC MAX phase inclusions as healing particles was studied. The oxidation kinetics of the Ti<sub>2</sub>AlC particles having an average diameter of about 10 μm was studied via thermogravimetry and/or differential thermal...journal article 2018
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Kwakernaak, C. (author), Sloof, W.G. (author)A fast and generic scheme is proposed to calculate the work of adhesion between two different materials or the cohesive energy between two crystal planes in a material. These calculations make use of the regular solution theory. This theory is extended to describe chemical interactions between atoms at either side of an interface. The so...journal article 2018
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Valdesueiro, David (author), Hettinga, Hans (author), Drijfhout, Jan Pieter (author), Lips, Priscilla (author), Meesters, G.M.H. (author), Kreutzer, M.T. (author), van Ommen, J.R. (author)In this work, we report a method to change the surface finish of a standard polyester-based powder coating paint, from gloss to matt, by depositing ultrathin films of Al<sub>2</sub>O<sub>3</sub> on the powder coating particles. The coating experiments were performed in a fluidized bed reactor at 1 bar and 27 °C, using a gas-phase coating...journal article 2017
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Nijdam, T.J. (author), Sloof, W.G. (author)The relation between the Y distribution in the alloy and the growth kinetics of the developing oxide scale was studied for the thermal oxidation of two Ni–20Co–19Cr–24Al–0.2Y (at.%) alloys at 1,373 K: (i) a coarse-grain cast alloy with large Ni5Y intermetallic precipitates, and (ii) a fine-grain freestanding coating with small Ni5Y precipitates....journal article 2007
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Yan, B. (author), Pham, H.T.M. (author), Ma, Y. (author), Zhuang, Y. (author), Sarro, P.M. (author)The authors demonstrate a method for the fabrication of in situ ultrathin porous anodic aluminum oxide layers (aspect ratio<2:1) on Si, which can be directly used as templates for nanodot preparation and for pattern transfer. The regular shape of the aluminum oxide pores is maintained even when the thickness of the aluminum oxide template is...journal article 2007
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Stassen, A.F. (author), De Boer, R.W.I. (author), Iosad, N.N. (author), Morpurgo, A.F. (author)We have performed a comparative study of rubrene single-crystal field-effect transistors fabricated using different materials as gate insulator. For all materials, highly reproducible device characteristics are obtained. The achieved reproducibility permits one to observe that the mobility of the charge carriers systematically decreases with...journal article 2004
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- Dekker, J.P. (author), Van der Put, P.J. (author), Veringa, H.J. (author), Schoonman, J. (author) journal article 1994
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- Butchereit, E. (author), Schreiber, M. (author), Schoonman, J. (author) journal article 1994
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