Materials Literature
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A new, bio-inspired printed monopole antenna (PMA) model is applied to monitor partial discharge (PD) activity in high voltage insulating systems. An optimized sensor was obtained by designing a PMA in accordance with the characteristics of the electromagnetic signal produced by PD. An ultra-wideband (UWB) antenna was…
BACKGROUND: The spectrum of indications for the use of membranes and scaffolds in the field of oral and maxillofacial surgery includes, amongst others, guided bone regeneration (GBR). Currently available membrane systems face certain disadvantages such as difficult clinical handling, inconsistent degradation, undirect…
Reliable and accurate knowledge of the physical properties of elementary point defects is crucial for predictive modeling of the evolution of radiation damage in materials employed in harsh conditions. We have applied positron annihilation spectroscopy to directly detect mono-vacancy defects created in tungsten throug…
Here we investigated interfacial reactions and interdiffusion of titanium/gold ohmic contacts with a tin-doped single-crystal β-Ga2O3 (010) substrate. After annealing at 470 °C for 1 min in N2 to form an ohmic contact, we studied the interface via scanning transmission electron microscopy and transmission electron mic…
The search for the reduction of costs for the implementation of renewable energies implies in the optimization of the parameters of the manufacturing processes of consolidated technologies. Among these technologies are the solar collectors composed of absorber films characterized by high absorption in the spectrum ran…
The authors wish to make the following corrections to this paper [...]
Material surfaces with tailored aerophobicity are crucial for applications where gas bubble wettability has to be controlled, e.g., gas storage and transport, electrodes, bioreactors or medical devices.Here, we present switchable underwater aerophobicity of hydrophobic polymeric substrates, which respond to heat with…
We developed a series of Co-rich CoxCr25(FeNi)75−x (x = 35, 45, 55, 65) high entropy alloys with improved strength and/or ductility, derived from lowering the stacking fault energy (SFE) and reducing the fcc phase stability of the equiatomic CoCrFeNi alloy. Thermodynamics and ab initio calculations demonstrated that i…
Adding an appropriate interfacial layer is a viable way to decrease the WW contiguity and enhance the interfacial bonding of WCu alloy simultaneously, hence increase the tensile ductility. In this regard, we prepared a new kind of WMoCu alloy with transition phase (TP) existing between W particles and Cu matrix us…
Density-graded metallic foam projectiles are proposed for shock loading simulation, with special focus placed upon designing pressure pulses having specific shapes. Experiments are performed to explore the potential of density-graded foam projectiles in generating shock loadings of various pulse shapes. Subsequently,…
Mechanically strong poly(acrylamide) nanocomposite hydrogels (NC gels), reinforced by calcium hydroxide nano-spherulites (CNS) with diameter <5 nm in the assistance of N,N′‑methylenebisacrylamide (BIS), are fabricated via free radical polymerization. In traditional hydrogels using BIS as cross-linker, the existence of…
Lattice structures are regarded as an excellent candidate for lightweight applications owing to their high specific strength and stiffness. In this paper, a novel lattice design is proposed, and its compressive properties are investigated. The Kagome lattice design is modified to form a new lattice core structure, nam…
High entropy oxide (HEO) materials display a reversible entropy-driven phase transformation that gives rise to a phase state consisting of the entropic single-phase and controllable volume fractions of a secondary phase, which we call the ‘phase spectrum’. Consolidated HEO samples were prepared with grain sizes spanni…
Magnetic springs are a fatigue-free alternative to mechanical springs that could enable compliant actuation concepts in highly dynamic industrial applications. The goals of this article are: (1) to develop and validate a methodology for the optimal design of a magnetic spring and (2) to benchmark the magnetic springs…
MEMS switches include mobile beams in their mechanical structure and these suspended parts are essential for the device functioning. This paper illustrates the most important instability phenomena related to MEMS switches. Starting from the most important instability exploited in these devices—the electrical actuation…
The present study is focused on the application of a ceramic tubular high temperature heat exchanger with engineered cellular architectures. Thermal design and optimization to maximise the radiative heat transfer has been investigated both experimentally and computationally. Numerical models were designed involving va…
Memristor is a nanoscale electronic element with variable resistance that depends on the amount and direction of the charge passing through it. As a promising candidate, this memristive element opens up a new approach for the implementation of Boolean logic operations. In this study, a flexible logic unit circuit (LUC…
In this paper, the recent progress on Ti6Al4V fabricated by three mostly developed additive manufacturing (AM) techniques-directed energy deposition (DED), selective laser melting (SLM) and electron beam melting (EBM)-is thoroughly investigated and compared. Fundamental knowledge is provided for the creation of links…
Carbonized nano-Co3O4 particles and diatomite were used for preparation of the composite of carbonized nano-Co3O4/diatomite by pyrolysis method, the magnetic and absorption properties were studied. The composite was characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, vib…
VRAM (vacuum resin absorbable molding) process was used to prepare the epoxy resin matrix hybrid composites with ramie fiber cloth and glass fiber cloth.The storage modulus,the loss factor and the mechanical property of the composites were tested.Vibration characteristics were estimated through the resonance frequenci…