Materials Literature
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Chemical-vapor-deposited (CVD) diamond films are considered as neutron detectors for nuclear fusion devices because of their radiation hardness. Data about the radiation hardness of polycrystalline CVD diamond films exposed to 14 MeV neutron are missing in literature so the actual capability of CVD diamond detectors t…
The crystal structures of natural Ag-free lillianite of fumarolic origin from Vulcano, Aeolian Islands, Italy, Pb 2.88 Bi 2.12 (S 5.67 Se 0.33 ) ∑6.00 , with a 13.567(1), b 20.655(2), c 4.1216(4) A, V 1155.0(2) A 3 , space group Bbmm , Z = 4, and galenobismutite also from Vulcano, Pb 1.00 Bi 2.03 (S 3.87 Se 0.11 ) ∑3.…
Abstract The use of various copolymers as dispersants/intercalants/exfoliants in polypropylene (PP)‐clay nanocomposites based on unmodified montmorillonite clays (NaMMT) has been explored. The primary objective of this research has been to find dispersants that allow PP nanocomposites to be formed by direct melt mixin…
This paper deals with the modelling of moderate pressure H2 and H2/CH4 microwave plasmas used for diamond deposition. The first part of the paper reports on the development of a detailed collisional radiative model for moderate pressure pure H2 plasma. Several effects related to electron kinetics, H2 vibrational kinet…
The lowest oscillation mode of a pendant drop has long been conceived to be the longitudinal vibration, i.e., periodic elongation and contraction along the longitudinal direction. However, here we experimentally show that the rotation of the drop about the longitudinal axis is the oscillation mode of the lowest resona…
The pale blue rim of olenite on a black crystal of olenite–schorl tourmaline from an abyssal pegmatite at the locality Kuklík, near Kutná Hora, Czech Republic, has been chemically and structurally characterized. The optimized formula, calculated using chemical and structural data, is ^X(Na_(0.54)Ca_(0.14)K_(0.01)□_(0.…
On the basis of analyzing the brittleness, ductileity, and the removal mechanisms of the^nano-ZrO2 Ceramics, the critical ductile grinding depth formula of the nano-ceramics was established. Due to superductileity of the nano-ZrO2 ceramics, it couldn’t apply the formula of the common engineering ceramic material accor…
Abstract Two polymorphic modifications of calcium carbonate nanoparticles (calcite and aragonite) characterized by different shape and coated with fatty acids were used as reinforcement phases of Nylon 6. Nylon 6 based nanocomposites filled with 1% and 5% by weight of calcite and aragonite were prepared by melt mixing…
The elastic moduli for fine particle Zn x Cu 1-x Fe 2 O 4 (x = 0.2, 0.4, 0.6 and 0.8) spinel ferrite system synthesized by wet-chemical technique have been determined through infrared spectroscopy and X-ray diffraction pattern analysis. The force constants for tetrahedral and octahedral sites determined through IR spe…
The giant magnetoresistance (GMR) of multilayered Co∕Cu nanowires potentiostatically electrodeposited inside the pores of an anodized alumina template was studied in the current perpendicular to the plane (CPP) geometry. The maximum magnetoresistance change of 13.5% was observed for Co(8nm)∕Cu(10nm) nanowires at room…
Thin films of the Mn+1AXn (MAX) phase (M: early transition metal; A:A-group element; X: C and/or N; n=1–3) Ti2AlN were epitaxially grown onto single-crystal MgO(111) and MgO(100) substrates by dc reactive magnetron cosputtering from Ti and Al targets in an Ar∕N2 gas mixture at a temperature of 690 °C. To promote the n…
New metal-free, magnesium and zinc azaphthalocyanines ( AzaPc ) were prepared from 6-(3-tert-butylsulfany1-5,6-dicyanopyrazine-2-ylamino)hexanoic acid and its butylester and N,N-diethylamide. Their singlet oxygen production was measured by a dye-sensitized photooxidation of 1,3-diphenylisobenzofuran ( DPBF ) and Φ Δ v…
Suitable pH of the phosphating bath is crucial to restrain resolving rate of magnesium and obtain high quality phosphate coatings because of the high activity of magnesium. In this investigation a compact zinc phosphate coatings on AZ91D were successfully obtained from the phosphating bath with pH=2.15∼2.5. This figur…
Abstract Isotactic polypropylene (iPP) based nanocomposites filled with calcium carbonate nanoparticles (CaCO 3 ) were prepared by melt mixing and structure‐properties relationships of the nanomaterials were studied. Elongated CaCO 3 nanopowders coated with two different coating agents, polypropylene‐maleic anhydride…
Shape memory polymers are defined by their ability to store and recover strains when subjected to a particular thermo-mechanical cycle. The thermomechanical behaviour of shape memory polymers can be tailored by modifying the molecular structure of the polymer or by using the polymer as a matrix of multiphase composite…
The thermal degradation behaviour of rubber from six new Hevea brasiliensis clones (IAC 40, 56, 300, 301, 302 and 303) from São Paulo State, Brazil was studied by thermogravimetry using the Flynn–Wall–Ozawa approach to assess the kinetic parameters (reaction order, activation energy and pre-exponential factor) of the…
In the last two decades, Eyraud tried to interpret the soft characteristics in lead zirconate titanate ceramics (PZT) by an electron transfer between constitutive ions and/or dopants such as Ti3+/4+ or Fe2+/3+. These electron transfers are supposed to minimize the space charges (ρ p ) existing at the domain walls inte…
Abstract A new route has been developed to produce PP/silica nanocomposites starting from porous PP reactor powder and making use of sol‐gel chemistry. Silica‐like, nano‐sized particles were prepared in the pores of the PP reactor powder with a controlled degree of adhesion between PP and silica. Magic‐angle spinning…
The phase behavior of AfmN(BN2AN2)B(1-fmN) multiblock copolymer melts is studied within the weak segregation theory. The interplay between ordering on different length scales is shown to cause dramatic changes both in the ordered phase symmetry and periodicity upon small variation of the architectural parameters of th…
The addition of Al and Ga to b.c.c. Fe increases the magnetostriction of Fe in the [100] direction (a factor of 12 for Fe81Ga19). The Fe-based magnetostrictive materials are machineable, mechanically tough, and saturate in fields of only a few hundred Oersteds, even under compressive loads up to 97 MPa. The effect of…