Materials Literature
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An innovative spray deposition technique has been applied to produce in situ TiB2/Zn-30Al-1Cu composites. The microstructures of the spray-deposited composite were studied using scanning electron microscopy, transmission electron microscope and X-ray diffraction. The results have shown that the TiB2particulates are fo…
The effect of directional grain structure and strain rate on the impact properties and dislocation substructure of 6061-T6 aluminum alloy is studied. Impact tests are performed at strain rates ranging from 1x103 to 5x103s-1 using a split Hopkinson pressure bar system. Cylindrical specimens are prepared from the rolled…
The environmental resistance of two single crystal nickel based superalloys, CMSX-4 and CMSX-10, used as blading materials in aero-jet engines has been studied at temperatures in the range of 800–1000°C, representative of that encountered in the high compression section of the engines. Mapping of residual stresses in…
A periodic surface, consisting of a square, rectangular lattice containing metal patches in the unit cell, sandwiched between two dielectric materials and two confining metal planes is considered. The patches are connected to the ground plane by several vias. Small metallic objects are inserted in the dielectric layer…
The doping effect on the structural, microstructural and dielectric properties of bismuth layer structured SrBi2Nb2O9(SBN) ferroelectric ceramics has been investigated. The samples were obtained from the solid state reaction sintering method. Particularly, the A-site cation substitution of Sr2+by La3+has been consider…
Magnetic phase transitions that involve multipolar degrees of freedom have been widely studied during the last couple of decades, challenging the common approximation which assumes that the physical properties of a magnetic material could be effectively described by purely dipolar degrees of freedom. Due to the comple…
Two new Zn(II) coordination complexes [ZnL 2 (SCN) 2 ] ( I ) and [ZnL 2 Cl 2 ] ( II ) have been pre-pared by self-assembly of corresponding metal salts with ( E )-2-(3-(4-(1 H -imidazole-1-yl)styryl)-5,5-dimethylcyclohexo-2-enylidene) malononitrile (L) and characterized by IR spectrum, elemental analysis and single-cr…
Buckling of a thin cylindrical sandwich shell composed of elastic isotropic layers with different elastic properties under normal external pressure is the subject of this investigation. Differential equations based on the assumptions of the generalized kinematic hypothesis for the whole sandwich are used as the govern…
Resumen es: El objetivo del trabajo es establecer el comportamiento microestructural de una union soldada disimil en una aleacion HK 40 y el hierro fundido 24, la cu...
Temperature-dependent I-V characteristics are performed in this paper to investigate the trap states in AlGaN/GaN HEMTs. From temperature-dependent sub-threshold slope measurements conducted at 300K to 363K and 363K to 423K, two different trap densities are identified at AlGaN/GaN heterostructure interface with DitAan…
Isotherms and kinetic models are useful tool for the investigation of adsorption process. Carbon nanotubes (CNTs) grown on powdered activated carbons (PACs) was used as novel adsorbent. Two isotherms and three kinetic models were studied for the removal of cadmium from water. The isotherms were Langmuir and Freundlich…
There is a close relationship between Stress corrosion cracking (SCC) mechanism and properties of passive film of pure titanium in methanol solution with water. A scratch test was conducted on the surface of titanium immersing in methanol solution with varying water content. The test showed water changed the mechanica…
The superficial wear generated by cavitation in an electrolyte as sodium chloride 3.5%, causes damage in steels AISI 4140 by corrosion, it is commonly used in hydraulic machines, therefore suggest to coat with a Ti(CN)/TiNb(CN) multilayer system deposited with a 200 bilayers period, by means of the technique of physic…
Single particle tracking data are usually analyzed in terms of the mean square displacement (MSD) which exhibits, in the case of Brownian particles undergoing the anomalous diffusion, a time dependence that is slower (subdiffusion) or faster (superdiffusion) than a linear one. The particle velocity autocorrelation fun…
Used of metal as bone implant prosthesis continues to grow, demand also increases with the number of bone surgery cases in Indonesia. Cobalt alloy with variation of Cr (28.5; 30; 31.5; 33, and 34.5%mass) have been synthesized by smelting method that begins with the compaction, followed by smelting using Tri Arc Meltin…
This paper presents a lumped parameter model describing the electromagnetic behavior of Transverse Flux Reluctance Machines. Current dynamics and torque generation are obtained utilizing varying magnetic conductivities of the air gap along the rotor perimeter. The model parameters are identified experimentally using a…
Yifei Yuan, Anmin Nie, Sunand Santhanagopalan, Dennis Desheng Meng, Reza Shahbazian-Yassar; In-situ TEM Study on Electrochemical Behavior of α-MnO2 Nanowir
Planar multijunction thermal converters (MJTCs) are in widespread use as standards for ac voltage metrology at frequencies up to 1 MHz. At the National Institute of Standards and Technology (NIST), we are presently using MJTCs based on glassy substrates as standards at frequencies up to 100 MHz. Although these standar…
R Prakash Kolli, Frederick Meisenkothen; Optimization of Experimental Parameters and Specimen Geometry for PulsedLaser Atom-Probe Tomography of Copper, Mic
Peizhi Liu, Junjie Guo, Lei Liu, Wolfgang Windl, Gong Gu, Gerd Duscher; Direct Observation of Defects in Hexagonal Boron Nitride Monolayers, Microscopy and