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Zhang, S. (author), Fang, H. (author), Gramsma, M. E. (author), Kwakernaak, C. (author), Sloof, W.G. (author), Tichelaar, F.D. (author), Brück, E.H. (author), van der Zwaag, S. (author), van Dijk, N.H. (author)We have investigated the autonomous repair of creep damage by site-selective precipitation in a binary Fe-Mo alloy (6.2 wt pct Mo) during constant-stress creep tests at temperatures of 813 K, 823 K, and 838 K (540 °C, 550 °C, and 565 °C). Scanning electron microscopy studies on the morphology of the creep-failed samples reveal irregularly...journal article 2016
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Hernandez Santana, M. (author), Grande, A.M. (author), van der Zwaag, S. (author), Garcia, Santiago J. (author)Broadband dielectric spectroscopy (BDS) is introduced as a new and powerful technique to monitor network and macroscale damage healing in an elastomer. For the proof of concept, a partially cured sulfur-cured natural rubber (NR) containing reversible disulfides as the healing moiety was employed. The forms of damage healed and monitored were an...journal article 2016
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Farle, A.M. (author), Boatemaa, L. (author), Shen, L. (author), Gövert, S. (author), Kok, J.E. (author), Bosch, M (author), Yoshioka, S. (author), van der Zwaag, S. (author), Sloof, W.G. (author)Closure of surface cracks by self-healing of conventional and MAX phase ceramics under realistic turbulent combustion chamber conditions is presented. Three ceramics namely; Al<sub>2</sub>O<sub>3</sub>, Ti<sub>2</sub>AlC and Cr<sub>2</sub>AlC are investigated. Healing was achieved in Al<sub>2</sub>O<sub>3</sub> by even dispersion of TiC...journal article 2016
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Post, W. (author), Bose, R.K. (author), Garcia, Santiago J. (author), van der Zwaag, S. (author)This work reports on the healing of early stage fatigue damage in ionomer/nano-particulate composites. A series of poly(ethylene-co-methacrylic acid) zinc ionomer/Fe3O4 nanoparticle composites with varying amounts of ionic clusters were developed and subjected to different levels of fatigue loading. The initiated damage was healed upon localized...journal article 2016
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Abdolah Zadeh, M. (author), Grande, A.M. (author), van der Zwaag, S. (author), Garcia, Santiago J. (author)In the present work we show the effect of the crosslinking degree on the mechanical and healing behaviour of a healable thermoset dual-network polymer. A hyphenated rheological test (i.e. simultaneous rheology and FTIR) was used to follow the effect of the curing process on the mechanical behaviour in relation to the underlying chemical...journal article 2016
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Deutz, D.B. (author), Mascarenhas, N.T. (author), van der Zwaag, S. (author), Groen, W.A. (author)In this study, the influence of Li substitution on the piezoelectric performance of lead-free K<sub>0.5</sub>Na<sub>0.5</sub>NbO<sub>3</sub> (KNN)-epoxy composites is explored. KNN piezoceramic particles modified with 0-12 mol% of Li are prepared via a double calcination technique, resulting in a perovskite particulate which transitions from...journal article 2016
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Shaji Karapuzha, A. (author), Kunnamkuzhakkal James, N. (author), van der Zwaag, S. (author), Groen, W.A. (author)Modern flexible and sensitive sensors based on polymer–ceramic composites employ lead zirconate titanate (PZT) granulates having the morphotropic phase boundary (MPB) composition as the piezo active ingredient, as this composition gives the best properties in fully ceramic piezoelectric sensors. In this study, the possibility of using PZT...journal article 2016
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Susa, A. (author), Bose, R.K. (author), Grande, A.M. (author), van der Zwaag, S. (author), Garcia, Santiago J. (author)Traditional polyetherimides (PEIs) are commonly synthesized from an aromatic diamine and an aromatic dianhydride (e.g., 3,4′-oxidianiline (ODA) and 4,4′-oxidiphtalic anhydride (ODPA)) leading to the imide linkage and outstanding chemical, thermal and mechanical properties yet lacking any self-healing functionality. In this work, we have replaced...journal article 2016
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Shaji Karapuzha, A. (author), Kunnamkuzhakkal James, N. (author), Khanbareh, H. (author), van der Zwaag, S. (author), Groen, W.A. (author)The effects of Zr/Ti ratio on the dielectric and piezoelectric properties of the sintered Pb(Zr<sub>x</sub>Ti<sub>(1−x)</sub>)<sub>0.99</sub>Nb<sub>0.01</sub>O<sub>3</sub> piezoelectric ceramics across the entire range of phase diagram of the PZT solid solution was studied systematically. The materials were prepared by the conventional mixed...journal article 2016
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Deutz, D.B. (author), Mascarenhas, N.T. (author), Schelen, J.B.J. (author), de Leeuw, D.M. (author), van der Zwaag, S. (author), Groen, W.A. (author)A highly sensitive, lead-free, and flexible piezoelectric touch sensor is reported based on composite films of alkaline niobate K<sub>0.485</sub>Na<sub>0.485</sub>Li<sub>0.03</sub>NbO<sub>3</sub> (KNLN) powders aligned in a polydimethylsiloxane (PDMS) matrix. KNLN powder is fabricated by solid-state sintering and consists of microcubes. The...journal article 2017
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Khanbareh, H. (author), van der Zwaag, S. (author), Groen, W.A. (author)Composites of lead zirconate titanate particles in an epoxy matrix are prepared in the form of 0–3 and quasi 1–3 with different ceramic volume contents from 10% to 50%. Two different processing routes are tested. Firstly a conventional dielectrophoretic structuring is used to induce a chain-like particle configuration, followed by curing the...journal article 2017
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Sun, W. W. (author), Fang, H. (author), van Dijk, N.H. (author), van der Zwaag, S. (author), Hutchinson, C. R. (author)The precipitation of Au-rich precipitates on the external surfaces of Fe-Au alloys has been studied by scanning and transmission electron microscopy. The surface precipitates formed at elevated temperatures are found to self-organize in regular patterns and their growth rate is determined quantitatively. The observed surface precipitation at...journal article 2017
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- Hernandez Santana, M. (author), Grande, A.M. (author), van der Zwaag, S. (author), Garcia, Santiago J. (author) journal article 2017
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Zhu, Jianing (author), Luo, Haiwen (author), Yang, Zhigang (author), Zhang, Chi (author), van der Zwaag, S. (author), Chen, H. (author)Kinetics of the austenite (γ) to ferrite (α) transformation and the reverse ferrite (α) to austenite (γ) transformation in a series of Fe-X (X = Ni, Mn and Co) binary alloys has been experimentally and theoretically investigated. A transition from partitioning to partitionless transformation has been predicted to occur during both the γ→α and...journal article 2017
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Deutz, D.B. (author), Mascarenhas, N.T. (author), van der Zwaag, S. (author), Groen, W.A. (author)Composites of aligned (K,Na,Li)NbO<sub>3</sub> (KNLN) piezoceramic particles in a PDMS polymer matrix are presented as promising materials for flexible sensors and energy harvesters. Their ease of processing is matched with a relatively high damage tolerance and piezoelectric performance at low dielectric loss. To maximize piezoelectric...journal article 2017
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Bose, R.K. (author), Enke, Marcel (author), Grande, A.M. (author), Zechel, Stefan (author), Schacher, Felix H. (author), Hager, Martin D. (author), Garcia, Santiago J. (author), Schubert, Ulrich S. (author), van der Zwaag, S. (author)The main aim of this work is to study the respective contribution of the hard and soft blocks of a metal-ligand containing block copolymer to the self-healing behavior. To this aim, different block copolymers containing terpyridine were synthesized using reversible addition-fragmentation chain transfer (RAFT) polymerization. These block...journal article 2017
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Vieira Valente, R.D. (author), De Ruijter, Chris (author), Vlasveld, Daniel (author), van der Zwaag, S. (author), Groen, W.A. (author)Conductive polymer composites have been receiving increased interest both from the scientific community and industry with a special focus on electromagnetic interference (EMI) shielding applications. In this paper, we present the design, EM wave simulation, and validation through S-parameters measurements of an EMI shielding effectiveness (SE...journal article 2017
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Post, W. (author), Kersemans, M. (author), Solodov, I. (author), Van Den Abeele, K. (author), Garcia, Santiago J. (author), van der Zwaag, S. (author)A comparative study is performed on the monitoring of delamination healing in CFRP-ionomer sandwich composites by non-destructive techniques and destructive compression testing. Artificial delaminations of various areal dimensions and nature were introduced during production of the composites. The extent of the delamination and the healing...journal article 2017
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Post, W. (author), Cohades, A. (author), Michaud, V (author), van der Zwaag, S. (author), Garcia, Santiago J. (author)We report the development of an intrinsic healing glass fibre reinforced polymer (GFRP) composite based on a disulphide-containing organic-inorganic thermoset matrix. Thermomechanical experiments showed that the newly developed matrix has a combination of a Young's modulus value in the range of (800–1200 MPa), the ability to multiple...journal article 2017
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Yu, H. (author), Xu, W. (author), van der Zwaag, S. (author)The degradation of creep resistance in Ni-based single-crystal superalloys is essentially ascribed to their microstructural evolution. Yet there is a lack of work that manages to predict (even qualitatively) the effect of alloying element concentrations on the rate of microstructural degradation. In this research, a computational model is...journal article 2017