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From single- to double-first-order magnetic phase transition in magnetocaloric Mn1−xCrxCoGe compounds

Trung, N.T. (author), Biharie, V. (author), Zhang, L. (author), Caron, L. (author), Buschow, K.H.J. (author), Brück, E.H. (author)

Substitution of some Cr for Mn atoms in MnCoGe was employed to control the magnetic and structural transitions in this alloy to coincide, leading to a single first-order magnetostructural transition from the ferromagnetic to the paramagnetic state with a giant magnetocaloric effect observed near room temperature. Further increase in the Cr...

journal article 2010

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Giant magnetocaloric effects by tailoring the phase transitions

Brück, E.H. (author), Trung, N.T. (author), Zhang, L. (author), Caron, L. (author), Buschow, K.H.J. (author)

The MnCoGe alloy can crystallize in either the hexagonal Ni2In- or the orthorhombic TiNiSi-type of structure. In both phases MnCoGe behaves like a typical ferromagnet with a second-order magnetic phase transition. For MnCoGeBx with B on interstitial positions, we discover a giant magnetocaloric effect associated with a single first-order...

journal article 2010

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An analytical solution for tidal propagation in the Yangtze Estuary, China

Zhang, E.F. (author), Savenije, H.H.G. (author), Chen, S.L. (author), Mao, X.H. (author)

An analytical model for tidal dynamics has been applied to the Yangtze Estuary for the first time, to describe the tidal propagation in this large and typically branched estuary with three-order branches and four outlets to the sea. This study shows that the analytical model developed for a single-channel estuary can also accurately describe the...

journal article 2012

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Microscale Testing and Modelling of Cement Paste as Basis for Multi-Scale Modelling

Zhang, H. (author), Šavija, B. (author), Chaves Figueiredo, S. (author), Lukovic, M. (author), Schlangen, E. (author)

This work aims to provide a method for numerically and experimentally investigating the fracture mechanism of cement paste at the microscale. For this purpose, a new procedure was proposed to prepare micro cement paste cubes (100 × 100 × 100 µm3) and beams with a square cross section of 400 × 400 µm2. By loading the cubes to failure with a...

journal article 2016

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Comparison of Particle-Associated Bacteria from a Drinking Water Treatment Plant and Distribution Reservoirs with Different Water Sources

Liu, G. (author), Ling, F.Q. (author), Van der Mark, E.J. (author), Zhang, X.D. (author), Knezev, A. (author), Verberk, J.Q.J.C. (author), Van der Meer, W.G.J. (author), Medema, G.J. (author), Liu, W.T. (author), Van Dijk, J.C. (author)

This study assessed the characteristics of and changes in the suspended particles and the associated bacteria in an unchlorinated drinking water distribution system and its reservoirs with different water sources. The results show that particle-associated bacteria (PAB) were present at a level of 0.8–4.5?×?103 cells ml?1 with a biological...

journal article 2016

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Stretchable Binary Fresnel Lens for Focus Tuning

Li, X. (author), Wei, L. (author), Poelma, René H. (author), Vollebregt, S. (author), Wei, J. (author), Urbach, Paul (author), Sarro, Pasqualina M (author), Zhang, Kouchi (author)

This paper presents a tuneable binary amplitude Fresnel lens produced by wafer-level microfabrication. The Fresnel lens is fabricated by encapsulating lithographically defined vertically aligned carbon nanotube (CNT) bundles inside a polydimethyl-siloxane (PDMS) layer. The composite lens material combines the excellent optical absorption...

journal article 2016

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Additively manufactured scaffolds for bone tissue engineering and the prediction of their mechanical behavior: A review

Zhang, X.Y. (author), Fang, G (author), Zhou, J. (author)

Additive manufacturing (AM), nowadays commonly known as 3D printing, is a revolutionary materials processing technology, particularly suitable for the production of low-volume parts with high shape complexities and often with multiple functions. As such, it holds great promise for the fabrication of patient-specific implants. In recent years,...

journal article 2017

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H-Shaped Multiple Linear Motor Drive Platform Control System Design Based on an Inverse System Method

Qin, Caiyan (author), Zhang, Chaoning (author), Lu, H. (author)

Due to its simple mechanical structure and high motion stability, the H-shaped platform has been increasingly widely used in precision measuring, numerical control machining and semiconductor packaging equipment, etc. The H-shaped platform is normally driven by multiple (three) permanent magnet synchronous linear motors. The main challenges for...

journal article 2017

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Influence of microencapsulated phase change material (PCM) addition on (micro) mechanical properties of cement paste

Šavija, B. (author), Zhang, H. (author), Schlangen, E. (author)

Excessive cracking can be a serious durability problem for reinforced concrete structures. In recent years, addition of microencapsulated phase change materials (PCMs) to concrete has been proposed as a possible solution to crack formation related to temperature gradients. However, the addition of PCM microcapsules to cementitious materials...

journal article 2017

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Numerical thermal analysis and optimization of multi-chip LED module using response surface methodology and genetic algorithm

Tang, H. (author), Ye, Huai-Yu (author), Chen, Xian-Ping (author), Qian, Cheng (author), Fan, Xue-Jun (author), Zhang, Kouchi (author)

In this paper, the heat transfer performance of the multi-chip (MC) LED module is investigated numerically by using a general analytical solution. The configuration of the module is optimized with genetic algorithm (GA) combined with a response surface methodology. The space between chips, the thickness of the metal core printed circuit board...

journal article 2017

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Study on the Degradation of Optical Silicone Exposed to Harsh Environments

Yazdan Mehr, M. (author), van Driel, W.D. (author), De Buyl, Francois (author), Zhang, Kouchi (author)

Degradation mechanisms of silicone plates under harsh environment conditions are studied in this investigation. Environmental degradation of silicone free form, used as secondary optics in Light Emitting Diode LED lighting lamps and luminaires or any other applications requiring high quality optics being used, has negative implications for the...

journal article 2018

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Thermal Management on IGBT Power Electronic Devices and Modules

Qian, C. (author), Mirza Gheytaghi, Amir (author), Fan, J. (author), Tang, H. (author), Sun, B. (author), Ye, H. (author), Zhang, Kouchi (author)

As an increasing attention towards sustainable development of energy and environment, the power electronics (PEs) are gaining more and more attraction on various energy systems. The insulated gate bipolar transistor (IGBT), as one of the PEs with numerous advantages and potentials for development of higher voltage and current ratings, has been...

journal article 2018

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Asymmetric perceptual confounds between canonical lightings and materials

Zhang, F. (author), de Ridder, H. (author), Pont, S.C. (author)

To better understand the interactions between material perception and light perception, we further developed our material probe MatMix 1.0 into MixIM 1.0, which allows optical mixing of canonical lighting modes. We selected three canonical lighting modes (ambient, focus, and brilliance) and created scenes to represent the three illuminations....

journal article 2018

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Relationship between the size of the samples and the interpretation of the mercury intrusion results of an artificial sandstone

Dong, H. (author), Zhang, H. (author), Zuo, Y. (author), Gao, P. (author), Ye, G. (author)

Mercury intrusion porosimetry (MIP) measurements are widely used to determine pore throat size distribution (PSD) curves of porous materials. The pore throat size of porous materials has been used to estimate their compressive strength and air permeability. However, the effect of sample size on the determined PSD curves is often overlooked....

journal article 2018

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Coupled hygro-mechanical finite element method on determination of the interlaminar shear modulus of glass fiber-reinforced polymer laminates in bridge decks under hygrothermal aging effects

Jiang, X. (author), Luo, Chengwei (author), Qiang, X. (author), Zhang, Qilin (author), Kolstein, M.H. (author), Bijlaard, F.S.K. (author)

To investigate the mechanical degradation of the shear properties of glass fiber-reinforced polymer (GFRP) laminates in bridge decks under hygrothermal aging effects, short-beam shear tests were performed following the ASTM test standard (ASTM D790-10A). Based on the coupled hygro-mechanical finite element (FE) analysis method, an inverse...

journal article 2018

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Photoemission sources and beam blankers for ultrafast electron microscopy

Zhang, L. (author), Hoogenboom, J.P. (author), Cook, B.J. (author), Kruit, P. (author)

Observing atomic motions as they occur is the dream goal of ultrafast electron microscopy (UEM). Great progress has been made so far thanks to the efforts of many scientists in developing the photoemission sources and beam blankers needed to create short pulses of electrons for the UEM experiments. While details on these setups have typically...

journal article 2019

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Reactive ion etching for fabrication of biofunctional titanium nanostructures

Ganjian, M. (author), Modaresifar, K. (author), Zhang, H. (author), Hagedoorn, P.L. (author), Fratila-Apachitei, E.L. (author), Zadpoor, A.A. (author)

One of the major problems with the bone implant surfaces after surgery is the competition of host and bacterial cells to adhere to the implant surfaces. To keep the implants safe against implant-associated infections, the implant surface may be decorated with bactericidal nanostructures. Therefore, fabrication of nanostructures on...

journal article 2019

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Pulse length, energy spread, and temporal evolution of electron pulses generated with an ultrafast beam blanker

Weppelman, I.G.C. (author), Moerland, R.J. (author), Zhang, L (author), Kieft, E. (author), Kruit, P. (author), Hoogenboom, J.P. (author)

Crucial for the field of ultrafast electron microscopy is the creation of sub-picosecond, high brightness electron pulses. The use of a blanker to chop the beam that originates from a high brightness Schottky source may provide an attractive alternative to direct pulsed laser illumination of the source. We have recently presented the concept...

journal article 2019

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Optimisation of NB-IoT deployment for smart energy distribution networks

Nair, Varun (author), Litjens, R. (author), Zhang, Haibin (author)

A suitability assessment and performance optimisation is presented of narrowband Internet of Things (NB-IoT) cellular technology for use in smart energy distribution networks. The focus is on the reliable and timely delivery of outage restoration and management (ORM) messages at the event of a local or regional power outage. Both the cellular...

journal article 2019

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Indentation hardness, plasticity and initial creep properties of nanosilver sintered joint

Zhang, H. (author), Liu, Y. (author), Wang, Lingen (author), Sun, Fenglian (author), Fan, Xuejun (author), Zhang, Kouchi (author)

The nanoindentation test was conducted in this paper to investigate the indentation hardness, plasticity and initial creep properties of pressure sintered nanosilver joint at various test temperatures. The effects of strain rate on the indentation hardness were first investigated. Then yield stress of nanosilver sintered joint was studied in...

journal article 2019