Searched for: author%3A%22van+der+Zwaag%2C+S.%22
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Hussein, Abdelrahman (author), van der Zwaag, S. (author), Kim, Byungki (author)
In recent years, a new class of super saturated binary and ternary alloys have demonstrated the ability for the self-healing of creep-induced voids formed at the grain boundaries. However, a clear understanding of the parameters affecting the self-healing mechanism is still not yet complete. One of the main challenges is understanding the...
journal article 2024
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Yu, Hao (author), Fu, Jiabo (author), Wang, Chenchong (author), Chen, Yinping (author), Wang, Lingyu (author), Fang, Haixing (author), Li, Jinguo (author), van der Zwaag, S. (author), Xu, Wei (author)
To achieve an effective design of additively manufacturable Ni superalloys with decent service performance, a hybrid computational design model has been developed, where the strategy to tailor local elemental segregations was integrated within a scheme of minimizing the cracking susceptibility. More specifically, the phase boundary of primary...
journal article 2024
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Dai, Zongbiao (author), Chen, H. (author), Sun, Junjie (author), van der Zwaag, S. (author), Sun, Jun (author)
The carbon partitioning and lengthening rate of bainitic ferrite (α<sub>b</sub>) are excellent experimental parameters to estimate our level of understanding of the mechanism of bainitic transformation from a continuum perspective and our ability to capture it in analytical expressions. For Fe-C alloys and relatively simple steels the...
journal article 2024
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Tuluk, A. (author), van der Zwaag, S. (author)
In this work, we investigated the piezoelectric properties of BiFeO3-rich (1 − (y + x)) BiFeO3–y PbTiO3–x SrTiO3 (0.1 ≤ x ≤ 0.35; 0.1 ≤ y ≤ 0.3) bulk piezoceramics, as this system could potentially lead to the development of bulk piezoelectric ceramics that are suitable for high-temperature applications (&gt;200 °C). Samples with various levels...
journal article 2023
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Nutter, John (author), Qi, Jiahui (author), Farahani, H. (author), Rainforth, W. Mark (author), van der Zwaag, S. (author)
The current study reports in situ TEM observations of the growth of bainitic ferrite in an Fe-0.3C-3Mn-1.5Si-0.15Mo steel held isothermally at 300 °C with a higher spatio-temporal resolution than in previous studies. Significant variations were found in the lengthening rate, with the highest being in excess of 30,000 nm.s<sup>−1</sup> while...
journal article 2023
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Zamponi, R. (author), Ragni, D. (author), van der Zwaag, S. (author), Avallone, F. (author)
The aerodynamic noise radiated by the flow past a cylinder in the subcritical regime can be modeled by a quadrupolar sound source placed at the onset position of the vortex-shedding instability that is scattered by the surface with a dipolar directivity. When the cylinder is coated with a porous material, the intensity of the shed vortices is...
journal article 2023
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Veldhuizen, H.V. (author), Butt, Saira Alam (author), Van Leuken, Annemiek (author), van der Linden, B. (author), Rook, W. (author), van der Zwaag, S. (author), van der Veen, M.A. (author)
In order to capture and separate CO2 from the air or flue gas streams through nanoporous adsorbents, the influence of the humidity in these streams has to be taken into account as it hampers the capture process in two main ways: (1) water preferentially binds to CO2 adsorption sites and lowers the overall capacity, and (2) water causes...
journal article 2023
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Wu, Wentao (author), Chu, Liangyong (author), Garcia, Santiago J. (author), van der Zwaag, S. (author), Li, Ming (author), Shen, Liming (author), Bao, Ningzhong (author)
In this paper, graphene oxide (GO) modified microcapsules have been developed for use in self-healing Cardanol-based epoxy anti-corrosion coatings on steel substrates. The microcapsules had a polymethyl methacrylate (PMMA) shell, covered with aminated GO flakes and contained either of the two complementary healing agents mixed with nanosized...
journal article 2023
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Tuluk, A. (author), van der Zwaag, S. (author)
In the present work, we study the effect of quenching and annealing on the ferroelectric and piezoelectric properties at room temperature and elevated temperatures of a new ternary BiFeO<sub>3</sub>-PbTiO<sub>3</sub>-Li<sub>0.5</sub>Bi<sub>0.5</sub>TiO<sub>3</sub> bulk piezo ceramic. While sacrificing part of the maximally obtainable...
journal article 2023
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Montano, V. (author), Urban, Marek W. (author), van der Zwaag, S. (author), Garcia, Santiago J. (author)
Autonomous through-thickness scratch repair (healing) in coatings requires scratch closure and interfacial molecular sealing. Although qualitative aspects of the first stage of self-healing have been addressed, quantitative description enabling the control over the healing process need further understanding. In this work the polymer-architecture...
journal article 2022
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Zamponi, R. (author), Avallone, F. (author), Ragni, D. (author), van der Zwaag, S. (author)
Coating a circular cylinder with porous materials constitutes an effective passive strategy for reducing the flow-induced noise linked to the vortex shedding. Despite the number of investigations in the last decade, the noise-mitigation mechanisms associated with this technique remain unclear. The present research aims to clarify the role played...
conference paper 2022
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Tuluk, A. (author), Brouwer, J.C. (author), van der Zwaag, S. (author)
BiFeO <sub>3</sub> is a multiferroic material with a perovskite structure that has a lot of potential for use in sensors and transducers. However, obtaining pure single-phase BiFeO <sub>3</sub> ceramic with a low electrical conductivity via solid-state reactions remains a problem that limits its application. In this work, the suppression of...
journal article 2022
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De Breuker, R. (author), Mkhoyan, T. (author), Nazeer, N. (author), Stuber, V.L. (author), Wang, Xuerui (author), Mkhoyan, A. (author), Groves, R.M. (author), van der Zwaag, S. (author), Sodja, J. (author)
This article describes the challenges of integrating smart sensing, actuation, and control concepts into an over-sensed and over-actuated technology integrator. This technology integrator has more control inputs than the expected responses or outputs (over-actuated), and its every state is measured using more than one sensor system (over-sensed)...
journal article 2022
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Tuluk, A. (author), Joshi, Siddharth (author), Mahon, T.R. (author), van der Zwaag, S. (author)
Bismuth ferrite is a potentially interesting lead-free piezoelectric material for use in high-temperature applications due to its high Curie temperature. However, the high coercive field and high leakage currents of pure BiFeO3 (BFO) prevent reaching its theoretical performance level. The classic approach to tailoring piezoceramic properties...
journal article 2022
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Dong, Haokai (author), Chen, Hao (author), Riyahi khorasgani, Ahmadreza (author), Zhang, Boning (author), Zhang, Yongjie (author), Wang, Zhenqiang (author), Zhou, Xiaosheng (author), Wang, Wei (author), van der Zwaag, S. (author)
Mo is widely used as an effective microalloying element to improve mechanical performance of interphase precipitation steels, but the precise role of Mo in interphase precipitation behavior is not fully understood. In this contribution, interphase precipitation behavior in a series of Ti-Mo-bearing low carbon steels is systematically studied,...
journal article 2022
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Stuber, V.L. (author), Mkhoyan, T. (author), De Breuker, R. (author), van der Zwaag, S. (author)
This paper presents an experimental method to detect in-situ the location of transition on a multi-segmental trailing edge camber morphing wing during synchronous and asynchronous morphing. The wing consists of six independently morphing segments with two of the segments instrumented with eight embedded piezoelectric sensors distributed...
journal article 2022
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Kumthekar, A. (author), Ponnusami, Sathiskumar A. (author), van der Zwaag, S. (author), Turteltaub, S.R. (author)
Computationally-efficient surrogate models based on a Polynomial Chaos Expansion (PCE) are developed to quantify the uncertainties in the fracture behavior and lifetime of a self-healing thermal barrier coating system (SH-TBC) and a benchmark conventional TBC system. The surrogate models are built using deterministic information from...
journal article 2022
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Stuber, V.L. (author), Kotsonis, M. (author), van der Zwaag, S. (author)
Two piezoelectric series bimorph sensors were embedded below the skin of a NACA 0012 symmetrical airfoil to detect the local state of the boundary layer during wind tunnel testing. Small vanes piercing the airfoil skin were glued onto the bimorphs providing a mechanical coupling to the local mechanical force fluctuations imparted by the local...
journal article 2022
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Fernando, Niranjala (author), Veldhuizen, H.V. (author), Nagai, Atsushi (author), van der Zwaag, S. (author), Abdelkader, Amor (author)
Nanoporous polymers are becoming increasingly interesting materials for electrochemical applications, as their large surface areas with redox-active sites allow efficient adsorption and diffusion of ions. However, their limited electrical conductivity remains a major obstacle in practical applications. The conventional approach that alleviates...
journal article 2022
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Fu, Y. (author), van der Zwaag, S. (author), van Dijk, N.H. (author)
A set of numerical and analytical models is presented to predict the growth and contraction of grain-boundary creep cavities in binary self-healing alloys. In such alloys, the healing is realised by preferential precipitation of supersaturated solutes at the free surface of the cavity. The cavity grows due to the diffusional flux of vacancies...
journal article 2022
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