Materials Literature
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Effects of inter-element spacing on reflectarray unit cell design are studied in this paper. Reflectarray unit cells were commonly analyzed using a waveguide approach which assumed a fixed separation between identical elements in an infinite array. However, in practice, a reflectarray element can be surrounded by non-…
The separation of organic components has become increasingly important as one of the applications of pervaporation membranes. This interest is due to their application in areas that include the recovery of ethanol from a fermentation broth as a lower-energy-cost alternative to classical separation processes such as di…
A novel nitrogen donor ligand having a more pre-organized structure, 1,2,4-triazinyl phenanthroline (t-phen), is synthesized and evaluated for lanthanide–actinide separation in the present work. The extraction and selectivity for Am3+ over Eu3+ was found to be improved with t-phen as compared to the analogous 1,2,4-tr…
Layered LiNi0.4Mn0.4Co0.2O2 has been synthesized by the co-precipitation method, and the structural, electrochemical and magnetic properties were comprehensively studied by Rietveld analysis, charge–discharge potential profiles, X-ray photoelectron spectroscopy, and dc and ac susceptibilities. The material shows initi…
A new method of rolling T-bars using a common universal mill for H-beams was investigated. To study its deformation properties, model rolling experiments and finite element analyses were carried out. Before the experiment, there was concern about large side camber of the rolled T-bars due to the asymmetric section sha…
The dependence of the strength of rubber-metal bonds on different methods of their preparation is considered. Methods of hot and cold bonding of rubbers are described. The effect of different technological factors on the strength of rubber-metal bonds is analyzed.
The characteristics of the patch antenna based on photonic band‐gap (PBG) substrate with heterostructures were studied numerically by using the method of finite difference time domain (FDTD). The results indicate that, comparing to the conventional patch antennas, the expansion of working frequency band of the new pat…
BACKGROUND: Dental cobalt base alloys are biocompatible dental materials and have been widely used in dentistry. However, metals are bioinert and may not present bioactivity in human body. Bioactivity is the especial ability to interact with human body and make a bonding to soft and hard tissues. The aim of the presen…
A highly selective electrochemical sensor for dopamine (DA) has been successfully prepared, which can effectively eliminate the interferences from ascorbic acid and uric acid. The detection limit for DA is obtained as 0.5 μM in aqueous solution.
We have designed, fabricated, and made operational an ex situ cantilever beam magnetometer (CBM), which is versatile in the sense that it can measure most of the magnetic properties of a material in all probable shapes. The working principle of a CBM is discussed considering the magnetic torque into the beam theory. T…
Knowledge of prompt fission γ-ray emission has been of major interest in reactor physics for a few years. Since very few experimental spectra were ever published until now, new measurements would be also valuable to improve our understanding of the fission process. An experimental method is currently being developed t…
Wire electrical discharge machining (WEDM) has been used widely for the manufacturing of dies, moulds, punches and machine parts. The machining performance is affected by process parameters and type of wire electrode used. Increased cutting speed and improved accuracy can be realised in terms of high performance wire…
The microstructural hot-spot formation mechanism of non-shock HMX-based explosive ignition is still unknown. If recent optical observations made on post-mortem samples have clarified the main mechanisms of deformation at the microstructural scale, the train of each event is hardly tractable. In order to obtain realtim…
For the past few decades, the stiffness of materials used for roadway design and construction has been commonly characterized by the resilient modulus, defined as the ratio of the applied stress to the recoverable strain. However, the resilient modulus is not a fundamental material property of a viscoelastic material.…
In this study a modified model, using a non linear estimation of strain hardening rate vs. strain up to the critical stress, has been developed to predict single peak dynamic recrystallization (DRX) flow stress curves. The critical stress and strain for initiation of dynamic recrystallization were determined using: (1…
The reaction of Pt(d-t-bpy)(S-4-py)2 (1; d-t-bpy = 4,4′-di-tert-butyl-2,2′-bipyridine, S-4-py = pyridine-4-thiolate) with ZnX2 (X = Cl, Br, I) gave the respective heteronuclear metallocycles, [Pt(d-t-bpy)(S-4-py)2(ZnX2)]2 (X = Cl 2, Br 3, and I 4). In particular, the presence of weak intermolecular Pt(II)⋯Pt(II) (3.37…
In this work, we investigate the chemistry for an aqueous acetate-triethanolamine-ammonia based YBa(2)Cu(3)O(7-δ) (YBCO) precursor system. These precursor solutions are suited for the chemical solution deposition of superconducting YBCO layers on top of single crystal SrTiO(3) or buffered NiW tapes. The development of…
The alloy phase behavior of nanoparticle (NP) interfaces has been used to tailor asymmetric growth. Using either Au-Pd core-shell or Au-Au(x)Pd(1-x) core-alloy NP starting materials, the deposition of Ag resulted in asymmetric and symmetric growth respectively. The phase segregation of the interface was confirmed by T…
A high-voltage circuit breaker is an indispensable piece of equipment in the electric transmission and distribution systems. Transonic flow typically occurs inside breaking chamber during the current interruption, which determines the insulating characteristics of gas. Therefore, accurate compressible flow simulations…
A facile and green microwave route was developed to ultra-quickly synthesize magnetite colloidal nanocrystal clusters (MCNCs) by reducing iron(III) chloride with ethylene glycol within 10 min at 150 °C. The obtained uniform MCNCs exhibited excellent crystallinity, saturation magnetization and sustained aqueous stabili…