This paper presents a passive polarimetry method using a wavefront division optical device in order to measure the temperature distribution at the weld pool surface. We studied thermal emission from a hot liquid metal at a nearinfrared wavelength corresponding to a blind spectral window of the helium plasma generated during Gas Tungsten Arc Welding (GTAW) process. The refractive index of liquid...

In the present study NiCrAlY bond coating layer was produced by electroplating against common atmospheric plasma spraying (APS). Both types of the bond coats were applied on IN738LC base metal then, the YSZ (ZrO2-8% Y2O3) thermal barrier top layer was coated by atmospheric plasma spray technique. Hot corrosion is one of the main destructive factors in thermal barrier coatings (TBCs) which come ...

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The correlation between defect structure, metal segregation, and electrical resistivity of indium-tin-oxide nanopowder upon treatment in reducing atmosphere was investigated. Morphology and defect structure have been investigated by in situ synchrotron x-ray diffraction and transmission electron microscopy, while traces of metallic indium have been detected by susceptibility measurements utiliz...

The structure of the vapour produced upon heating the dimethylalkoxygallane [Me(2)GaOCH(2)CH(2)NMe(2)](2) has been studied by gas-phase electron diffraction and ab initio molecular orbital calculations; only the monomeric form [Me(2)GaOCH(2)CH(2)NMe(2)] is observed in the vapour, with the nitrogen atom forming a dative bond with the metal centre.

Abstract Modern hot sheet metal forming processes offer the opportunity, especially in automotive sector, to meet current demands for ultra-lightweight design. Due increased formability at high process temperatures, high-strength aluminium alloys are increasingly coming into focus of industry. However, complex thermo-mechanical interactions within these can lead undesirable microstructural chan...