Materials Literature
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Iridium-Rhenium(Ir-Re) thin films were deposited onto the tungsten carbide(WC) molding core by ion beam assist sputtering system. The Ir-Re films were prepared by compound-target sputtering with iridium, rhenium and chromium as the sources. Argon were inlet into the chamber to be the plasma and reactive gases. The Ir-…
The roles of crystallography in the integrity of the parts produced in ultraprecision machining and grinding processes have been quantitatively studied. In ultraprecision machining and grinding the tool geometry features and the process parameters are on the same order of magnitude as the grain size; therefore, the ma…
Gold and cadmium sulphide nanorods with aspect ratios ≈5 were synthesised in quantities of several hundred milligrams via surfactant-driven seed-mediated processes. Such nanorods then underwent surface-modification processes in which the surfactant coating was at least partially replaced with both commercially availab…
The TiO 2 etching characteristics and mechanism in HBr/Cl 2 /Ar inductively coupled plasma (with a fixed bias power of 200 W) were investigated. It was found that the TiO 2 etching rate in Cl 2 /Ar plasma is about 8 times faster than that in HBr/Ar plasma. In both HBr-rich (60% HBr + 20% Cl 2 + 20% Ar) and Cl 2 -rich…
Silver nanoparticles were prepared by reduction of AgNO3 in dilute aqueous solutions of 4-nitroaniline. The effect of 4-nitroaniline concentration on Ag nanoparticles was investigated, and the sensitivity and selectivity of the prepared Ag nanoparticles solution on the presence of melamine in milk were studied. A colo…
This article presents a new correlative model for surface tension of mixtures. This model is an extension of a predictive model recently proposed by our group. Other correlative models were evalu- ated and compared to the proposed model. Hydro- carbons mixtures exhibiting chemical nature or shape and chain size asymme…
In this paper the hardware implementation of producing the voltage pulses of variable duty cycle which are applied at the gate driver terminal of the switching devices used in the converter of a switched reluctance motor have been presented. These voltage gated pulses which corresponds to phase excitation sequence of…
The vibrational frequencies of N-benzoyl glycine in the ground state have been calculated using density functional method (B3LYP) by using 6-311++G(d,p) basis set. Theoretical vibrational spectra have been interpreted by means of potential energy distribution (PEDs) using MOLVIB program. The equilibrium geometry and t…
Quantum chemical calculations have been performed to compute optimized molecular geometry, atomic charges and vibrational characteristics for 2-hydroxy-3-methoxy-N-(2-chloro-benzyl)-benzaldehyde-imine (C15H14O2NCl) in the ground s tate using restricted Hartree-Fock (RHF) and density functional theory (DFT) methods wit…
This paper reports the investigation made on the effect of nano- and micro-particles additions on the thermal properties of epoxy based adhesives when exposed to different environmental conditions. The thermal behaviors of the adhesives are measured using dynamic mechanical thermal analysis (DMTA) following exposure t…
The point inflation rule (PIR) proposed in a previous paper as a method of obtaining a kind of selfsimilar quasilattices (SSQLs) is extended so that it is applicable to all kinds of SSQLs. The result will be an important step toward a complete MLD classification of SSQLs. The PIR is manifested by an affine autonomous…
A group of low-velocity impact tests on CCF300/QY8911 composite laminates were implemented by the low-velocity drop hammer test machine. The dent depth and the internal damage pattern with corresponding impact energy were studied, the internal delamination damage state of laminates after impact were observed through t…
Data retention is an important issue in the phase-change memories (PCMs) development, which is induced by the spontaneous thermal-driven crystallization for amorphous phase of chalcogenide material in PCMs. In this work, a data retention model for PCMs induced by spontaneous crystallization is presented. In this model…
AbstractDespite conventional assumptions, a different pattern of alliances and incompatible political ideologies, Iran has been among the few countries in the world that has maintained close and continuous relations simultaneously with both South and North Koreas, forging a surprising web of complex connections on the…
We successfully demonstrate both WOxand HfOxbased Transition Metal Oxide Resistive Random Access Memory (TMO R-RAM) devices with sub-10nm scaling. Contrary to similar results of large R-RAM devices, scaled WOxand HfOxdevices beyond 10nm exhibit obvious differences on operation windows and thermal stabilities. Instead…
Crystal material has an important role in material engineering. FeCl2•4H2O crystal has broad prospects in composite which has been used in energy filed, water treatment field and chemstry industry. To investigate the relationship between properties and construction, absorption spectra has been researched.Considering t…
Demixing of binary fluids under slow temperature ramps shows repeated waves of nucleation which arise as a consequence of the competition between generation of supersaturation by the temperature ramp and relaxation of supersaturation by diffusive transport and flow. Here, we use an advection-reaction-diffusion model t…
The mechanical properties difference between soy protein isolate-based film and whey protein-based film was researched. The elongation at break, tensile strength of the pure soy protein isolate film both are better than that of the pure whey protein concentrate film, which is respectively 10 times and 25 times. After…
Silicon (Si) quantum dot (QD) superlattice structures are promising candidates for all-Silicon tandem solar cells. An original top-down process involving a bio-template etching mask and damage-free neutral beam etching has been developed in order to fabricate a sub-10-nm highly ordered and dense two-dimensional (2D) a…
In this paper, a problem of the stress-strain diagram approximation at elastic and plastic deformation is considered and the interrelation of conditional and true diagrams for hardened and non-hardened metals is established.