Materials Literature
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Ballistic penetration of conically cylindrical steel projectile into 3D orthogonal woven composite (3DOWC) was investigated from finite element analyses and ballistic impact tests. Based on the observation of the microstructure of the 3DOWC, a microstructure model was established for finite element calculation. In thi…
Heusler alloys with nominal composition Ni 73− x Fe x Ga 27 ( x = 17, 18, 19, 20, 21, 22) were prepared by arc melting and subsequent homogenization by annealing. The magnetic properties of the alloys were studied to analyse the magnetic entropy change as a function of temperature. The maximum entropy change was obser…
The weathering performance of rice husk-filled high-density polyethylene (RHPE) and natural wood was investigated in this study. The injection molded RHPE, in column end-cap (CECap) shapes, was exposed to both natural and accelerated weathering attacks. The durability of RHPE was compared to Kempas wood (Koompassia ma…
Abstract A posteriori estimates of errors in quantities of interest are developed for the nonlinear system of evolution equations embodied in the Cahn–Hilliard model of binary phase transition. These involve the analysis of wellposedness of dual backward‐in‐time problems and the calculation of residuals. Mixed finite…
Abstract Seven cationic surfactants: 1‐methyl‐3‐tetradecyl imidazolium bromide, 1‐methyl‐3‐hexadecyl imidazolium bromide, N , N ‐tetradecyl pyridinium bromide, N , N ‐hexadecyl pyridinium bromide, N , N ‐dimethyl‐ N ‐ethylbenzyl ammonium bromide, N , N ‐dimethyl‐ N ‐ethylbenzyl ammonium laurate and N , N ‐dimethyl‐ N…
The mass manufacture of tires and the difficulty for their elimination or storage constitutes a serious environmental problem. At present, several methods for the recycling of tires are used, such as mechanical crushing, in which the steel vulcanized rubber and the fibers are separated; this rubber is being used in nu…
The heterometallic hexanuclear cyanide-bridged complex {[Mn(bpym)(H(2)O)](2)[Fe(HB(pz)(3))(CN)(3)](4)} (1), its C(15)N and D(2)O enriched forms {[Mn(bpym)(H(2)O)](2)[Fe(HB(pz)(3))(C(15)N)(3)](4)} (2) and {[Mn(bpym)(D(2)O)](2)[Fe(HB(pz)(3))(CN)(3)](4)} (3), and the hexanuclear derivative complex {[Mn(bpym)(H(2)O)](2)[F…
Abstract Smoke is considered to be the main hazard of fires involving epoxy resins but its production depends on many variables, principally the chemical character and the burning rate of the polymer plus the availability of oxygen. The work reported aimed to study the smoke suppressant effect and flammability perform…
We propose distinct element method modeling of carbon nanotube systems. The atomic-level description of an individual nanotube is coarse-grained into a chain of spherical elements that interact by parallel bonds located at their contacts. The spherical elements can lump multiple translational unit cells of the carbon…
Two new fluorene-based copolymers PFOH and PHOH were synthesized through Suzuki-coupling reaction, with p-N,N-bis-(2-hydroxyethyl)aminophenyl and bis(6'-(diethanolamino)hexyl) as side chains, respectively. They were characterized by (1)H NMR, IR, and gel-permeation chromatography (GPC). PFOH shows blue-green emission…
The structural properties of sodium manganates and iron substituted sodium manganates with compositions Na2/3Mn1-xFexO2 (x=0, 1/3 and 2/3) were studied by Raman spectroscopy. The Raman spectroscopy allows distinguishing between layered phases with orthorhombic (Cmcm space group) and hexagonal (P63/mmc space group) dis…
An approach to estimate fiber/matrix interface frictional coefficient of ceramic matrix composites under fatigue loading is developed by means of hysteresis loops. The Coulomb friction law is adopted to describe the interface shear stress in the debonded region. The matrix crack space and interface debonded length are…
A singly N-fused [28]hexaphyrin was isolated and metalated with Pd(OAc)2 to give a conformationally twisted Pd(II) complex that displays distinct Möbius aromatic properties such as a strong ring current and an absorption spectrum characteristic of an aromatic porphyrinoid.
A-site substituted cerium metavanadates, Ce1−xSrxVO3, were synthesised by solid-state reactions from single-phase powders of the corresponding orthovanadates. All samples were found to exhibit an orthorhombic perovskite structure of space groupPnma (62) with a = 5.5181 (3), b = 7.7853 (2) and c = 5.5155 (4) Å for Ce0.…
In this study, untreated and treated jute fiber composites were investigated as candidates to replace glass fibers as reinforcement to produce structural composites with better environmental performance. The surface of the jute fibers was modified by drying and bleaching/drying treatments to improve the wetting behavi…
A 4 Mb embedded phase change memory macro has been developed in a 90 nm 6-ML CMOS technology. The storage element has been integrated using 3 additional masks with respect to process baseline. The cell selector is implemented by a standard LV nMOS device, achieving a cell size of 0.29 μm2. A dual-voltage row decoder a…
As nanoreactor for the synthesis of metal nanoparticles, hydrogen-bonded layer-by-layer assembled (LBL) films may be a better choice than the electrostatic ones, because more carboxylic acid groups are available for metal ion binding. However, these films should be crosslinked before metal ion loading because of their…
The elastic and anelastic properties of a polycrystalline sample of ${\text{Pr}}_{0.48}{\text{Ca}}_{0.52}{\text{MnO}}_{3}$ have been investigated by resonant ultrasound spectroscopy, as a function of temperature (10--1130 K) and magnetic field strength (0--15 T). Marked softening of the shear modulus as the $Pnma\ensu…
Hexagonal boron nitride (h-BN) is a very versatile material that is used in a number of applications due to its unique combination of properties. This paper reviews typical h-BN qualities and their applications as functional particle in coatings and as sintered parts. As an example, the EKamold® coating family is pres…
The hydrothermal oxidation of Ce 3+ in basic aqueous solution by NaBi V O 3 at 240 °C produces fine powders of cerium−bismuth oxides with crystallite sizes of less than 10 nm, as observed by transmission electron microscopy (TEM). Analysis of X-ray absorption near-edge structure at the Bi L III and Ce L III edges conf…