A simulation study of the static and dynamic critical behavior of a symmetric binary Lennard-Jones mixture is briefly reviewed. Using a combination of semi-grand-canonical Monte Carlo (SGMC) and molecular dynamics (MD) methods near the critical temperature of liquid-liquid unmixing, the correlation length and “susceptibility” related to the critical concentration fluctuations are estimated, as ...

Corrosion of nickel and copper electroplated coatings on SS316H in molten FLiNaK salt was studied. 500- 1000-hour static corrosion tests were performed at 700 degrees Celsius. Characterization the following indicated that they did not degrade during experiment fully protected underlying from chromium dissolution. Interdiffusion between coating extremely limited, interdiffusion SS316H. Diffusion...

We report multi-component high-entropy materials as extraordinarily robust diffusion barriers and clarify the highly suppressed interdiffusion kinetics in the multi-component materials from structural and thermodynamic perspectives. The failures of six alloy barriers with different numbers of elements, from unitary Ti to senary TiTaCrZrAlRu, against the interdiffusion of Cu and Si were characte...

N-type CdSe films with thicknesses of 470-630 nm were grown on (001) and 2"-miscut GaAs wafers by ArF (193 nm) pulsed laser ablation of stoichiometric CdSe targets at platen temperatures (Tp) of 250425°C in vacuum and ambient Ar gas. Film-substrate interdiffusion was studied with Auger depth profiling, as well as energy dispersive x-ray fluorescent spectroscopy (EDS). Both techniques showed tha...

In this work, different dielectric caps were deposited on the GaAs/AlGaAs quantum well ~QW! structures followed by rapid thermal annealing to generate different degrees of interdiffusion. Deposition of a layer of GaxOy on top of these dielectric caps resulted in significant suppression of interdiffusion. In these samples, it was found that although the deposition of GaxOy and subsequent anneali...

A 0.5 μm thick layer of rhodium was deposited on the CMSX 4 superalloy by the electroplating method. The rhodium-coated superalloy was hafnized and aluminized or only aluminized using the Chemical vapour deposition method. A comparison was made of the microstructure, phase composition, and oxidation resistance of three aluminide coatings: nonmodified (a), rhodium-modified (b), and rhodiumand ha...

The interdiffusion of GaxIn12xN0.04As0.96 /GaAs single quantum well ~QW! structure with well width of 6 nm is studied theoretically. The as-grown Ga concentration in the QW is chosen to be 0.7 and 0.6 for the operation wavelengths of 1.3 and 1.55 mm, respectively. We studied the effects of interdiffusion on the in-plane strain, confinement potential, and subband energy levels of the QW using Fi...

The effect of polystyrene (PS) matrix relaxation on interdiffusion at a PS and poly(viny1 methyl ether) (PVME) interface was investigated with attenuated total internal reflectance infrared spectroscopy (ATR-FTIR) at 105 and 85 "C, corresponding to 5 "C above and 15 "C below the Tg of PS, respectively. Monodisperse PS samples with M, of 3.0 x lo6 and 1.05 x lo5 were used to simulate relaxation ...

A self-consistent model for the band structure and optical gain spectra in interdiffused GaxIn1−xN0.04As0.96/ GaAs single quantum wells are studied theoretically using Fick’s Law and the Fermi Golden Rule. Due to quantumwell interdiffusion, the peak gain and its peak vary with the annealing time. Our results show that the interdiffusion technique can be used to tune the operation wavelength for...

A technique for measuring interdiffusion in multilayer materials during rapid heating using X-ray reflectivity is described. In this technique the sample is bent to achieve a range of incident angles simultaneously, and the scattered intensity is recorded on a fast high-dynamic-range mixed-mode pixel array detector. Heating of the multilayer is achieved by electrical resistive heating of the si...