Materials Literature
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The family of perovskite ferroelectrics based on sodium potassium niobate (NKN) ceramics exhibit useful piezoelectric properties and show potential for the replacement of conventional lead based piezoceramics. In the present study, iron-doped NKN ceramics were prepared by a solid state reaction method. Ferroelectric h…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation J. Q. Wu, Jun Chen, S. Z. Deng, N. S. Xu; Field emission properties of α-Fe2O3 nanotips prepared…
In this work we studied the As redistribution in SiO2(70 nm)/Si(30 nm)/SiO2(70 nm) multilayer during postimplantation annealing. By Rutherford backscattering spectrometry and Z-contrast transmission electron microscopy we found an As accumulation at the Si/SiO2 interfaces and at the Si grain boundaries with no segrega…
The inhibitive and residual protective effects of an organic inhibitor, benzimidazole derivative, were studied. The protective effect K increased with the increasing concentration of the compound. The coefficient of the residual protective effect K t of the inhibitor and its mixture with anions is a linear function of…
Zinc oxide (ZnO) and Dysprosium (Dy) doped ZnO nano films have been successfully prepared by radio frequency (RF) magnetron sputter. Then the crystal structure, morphology and optical of the films were investigated. All the samples have a preferred orientation with the (0 0 2) orientation perpendicular to the substrat…
The two crystallographic modifications of AuSe, α-AuSe and (β-AuSe, were studied by 197 Au Mössbauer spectroscopy. Despite the different crystal structures, the Mössbauer spectra of the two phases are nearly the same, and reveal the presence of two gold sites with Mössbauer parameters typical for Au I Au III . The Mös…
MAX phases, include Ti3SiC2, Ti2AlC etc, are machinable ternary carbides or nitrides with excellent properties. These materials, however, have obvious nonlinear elastic deformation due to nano- layered crystal structure. The stress-strain curves of cyclically load-unload test have obvious hysteretic loops. Because of…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation K. Murakami, T. Matsuo, F. Wakaya, M. Takai; Electron wave interference induced by electrons emit…
Dry high-speed cutting of spiral bevel gear is a non-linear dynamic process, involving partial high cutting temperature, high shear fracture, and high strain rate and so on. The accurate description of gear materials' mechanical characteristics in such physical environment is the foundation of dry high-speed cutting n…
Controlled manipulation of the electron spin by means of a microwave field is investigated. The near magnetic field generated by a copper wire antenna is measured experimentally and simulated theoretically, and the optimum antenna length and position are obtained. By measuring the change in the fluorescence of nitroge…
The surface roughness of the hydraulic prop had an important effect on the wear resistance, fatigue strength and property of fit. The ultrasonic surface rolling extrusion (USRE) processing experiment was employed to improve the surface roughness of the hydraulic prop, some machine parameters such as the tools transfer…
Investigated was the crystal structure of the Ti-Zr, Ti-Hf, and Ti-Zr-Hf alloys prepared by the novel method of “hydride cycling” suggested by us recently. The XRD data showed formation of the ω-phase in alloys with hydrides ratios TiH 2 /ZrH 2 (TiH 2 /HfH 2 ) ≈ 2, 1, 0.44: Ti 0.67 Zr 0.33 (Ti 2 Zr), Ti 0.67 Hf 0.34 (…
The aim of this research was to prepare and investigate the behaviour of thermoplastic elastomers (TPE) from epoxidised natural rubbers (ENR) blended with polystyrene. ENRs with different amounts of epoxide groups were prepared via in situ epoxidation method and denoted accordingly as ENR25, ENR35 and ENR50. Polystyre…
The Y2Si2O7:Eu3+ sample was prepared with the sol-gel method. The Y2O3:EU3 was dispersed in SiO2, and the complex Y2Si2O7:Eu3+ particles were synthesized at high annealing temperature. The sample consisted of nearly spherical particles with an average size about 60 nm. The ultraviolet excitation spectra and emission s…
The performance of cutting tools with nanostructural coatings is investigated.
Abstract Grafting of PMMA and/or PS brushes from the surface of glass fibers by SI‐ATRP has been investigated in order to achieve a controlled surface structure of the matrix. The surface composition and morphology of the modified glass fibers were analyzed by FTIR, XPS, TGA, and SEM. The results indicated that the su…
Novel nickel(II) and iron(II) complexes with 1-(2(4)-chlorophenyl)benzothiazolylformazans L and L’ of the general formulas ML 2 and ML′ 2 were obtained. According to X-ray diffraction data, the coordination polyhedron MN 6 is a distorted octahedron. This geometry of the coordination polyhedron is determined by the nat…
This paper describes the preparation of modified polypropylene (PP) fibers. The modified PP composite was prepared by compounding PP in the presence of polyvinyl alcohol (PVA), PP grafted with maleic anhydrate (PPMAH), and montmorillonite (MMT). The resultant PP/PVA/PPMAH/MMT nanocomposite was easily spinnable and the…
Zn–In–Sn-O (ZITO) and In–Sn-O (ITO) thin films were deposited at room temperature on poly(ether sulfone) (PES) substrates using a combinatorial rf magnetron co-sputtering system. The cationic contents of the films were varied using a compositionally combinatorial technique. The average optical transmittance of the ZIT…
Measurements of electronic structure in solids by quantitative convergent-beam electron diffraction (QCBED) will not reach their ultimate accuracy or precision until the contribution of the background to the reflections in energy-filtered CBED patterns is fully accounted for. Apart from the well known diffuse backgrou…