Near- and mid-infrared optical coherence tomography (OCT) is evaluated as a non-destructive non-contact reflection imaging modality for inspection of industrial marine coatings. Near-infrared OCT was used to obtain high-resolution images (~6/2 µm lateral/axial) hidden subsurface cracks defects in resin base coating, which had been exposed high pressure temperature study coating degradation host...

Presently different optical devices are used practically at all modern neutron sources to form neutron beams. The basic event in forming neutron optics at PNPI was creation of highly efficient polarizing mirror on the glass substrate in 1972 [1,2]. It had a polarizing Ñî 60 Fe 40 coating and an antireflective Ti 85 Gd 15 underlayer. The coatings were prepared by vacuum thermal evaporation of ma...

nanostructured alumina thin films were coated on stainless steel by sol-gel dip coating method. in order to prevent crack formation, al2o3 films were kept in a solvent bath immediately after coating to reduce the rate of drying. effects of calcination temperature and withdrawal speed on structural properties were analyzed using xrd and sem. topography and thickness of coatings were analyzed by ...

In photonics and optics, the refractive index of a material, first introduced by Isaac Newton as the optical density, is the most fundamental material constant. Since the refractive index determines refraction and reflection occurring at the boundary between two media, it is a critical parameter for the design of optical components, such as distributed Bragg reflectors (DBRs), omnidirectional r...

Abstract Efficient thermal management is essential for the energy balance and comfort. In this context, design of textiles, which can modulate infrared radiation emitted by human body, attractive. These fabrics will manage microclimate between skin fabric. The proposed textile consists coating commercial woven based on polyamide 6–6 a dip‐coating process. incorporation fine spherical silica par...

Microstructured antireflective coatings (ARCs) can reduce reflection losses over a wide range of incidence angles when applied to the surface high-efficiency III-V photovoltaic cell in concentrator (CPV) system. In this article, we present microstructured ARC consisting monolayer close-packed silica microbeads partially submerged within polydimethylsiloxane (PDMS) encapsulant for use reference ...

the aim of this work is to synthesize and investigate the performance of yttria-doped zirconia solgelcoatings in the chemical corrosion prevention of zircaloy-4 (zirconium alloy) in a 1 n h2so4environment. the influence of four different molar ratios of water to alkoxide, namely 1, 4, 12, and20, on the coating quality and its corrosion prevention performance was investigated. differentialtherma...

Recent studies show that the shape of internal cavity with periodic distribution has a significant impact on characteristics anechoic coating. In this study, we proposed genetic algorithm-based method for optimizing design parameters By transforming 3D finite element model (FEM) coating to 2D axisymmetric (AFEM), and COMSOL MATLAB co-simulation combined algorithm applied obtain optimal paramete...