Rare-earth is an efficient refiner for surface modification of steel material. This study presents the synergistic influence Y2O3 nanoparticles (YNPs) and Mn-oxide secondary phase on microstructure mechanical properties 14CrSiMnV coating fabricated by plasma transfer arc cladding process. The results indicated that residual Y accumulated with Mn, forming a oxide particle instead inclusions or s...

An optical fibre chemical sensor that is insensitive to interfering parameters including temperature and surrounding refractive index is described. The sensor is based upon a Mach-Zehnder interferometer formed by a pair of identical cascaded long period gratings (LPGs), with the entire device coated with a mesoporous coating of silica nanoparticles. A functional material is infused only into th...

Abstract Nickel-based alloy coatings were widely used for the remanufacturing of dies and moulds by laser cladding, but crack sensitivity would be increase due to higher strength hardness, which reduced wear resistance Ni-based alloys. In this paper, with addition a plastic phase (an austenitic stainless net) prepared using cladding technology, CeO 2 was added in layers. The cracking mechanism,...

An improved design for hollow core anti-resonant fibers (HAFs) is presented. A split cladding structure is introduced to reduce the fabrication distortion within design tolerance. We use numerical simulations to compare the Kagome fibers (KFs) and the proposed split cladding fibers (SCFs) over two normalized transmission bands. It reveals that SCFs are able to maintain the desired round shape o...

the aim of this project is to fabricated an aluminium-copper bimetal through the fusion method and examine its performance. an aluminium-copper-aluminium bimetal was built by the laser cladding method. the laser power as well as the annealing time effects on its interfacial properties of the bonding’s formed through the laser cladding were investigated. to fabricate the multilayer bimetal, the ...

Metal Matrix Composite (MMC) coatings of Tungsten Carbide (WC) and Nickel (Ni) powder were produced using laser cladding process. A crack free good metallurgically bonded WC-Ni coating about 5mm thick from varying both energy density percent mixture Ni WC. In this study, the microstructure characterised optical microscope (OM), scanning electron (SEM) with EDS, while mechanical properties studi...

The performance of Cr-coated Optimized ZIRLO™ as accident tolerant fuel cladding material for pressurized water reactors (PWRs) is assessed. coating oxidation mechanisms, oxide stability, and the transformation Cr-coating/Optimized interface are among studied phenomena. For this purpose, samples were exposed at 1200°C in steam 3 min, 20 min 40 min. As-fabricated coated claddings, plus specimens...

In this paper we introduce a new mathematical model, which can be used to investigate the response of a long-period fibre grating to changes in ambient refractive indices of values both greater and less than that of the cladding. A numerical method to calculate the HE core and cladding modes is presented. The results show that even when the ambient refractive index is higher than that of the cl...

This paper numerically and experimentally investigates and demonstrates the design of an optofluidic in-plane bi-concave lens to perform both light focusing and diverging using the combined effect of pressure driven flow and electro-osmosis. The concave lens is formed in a rectangular chamber with a liquid core-liquid cladding (L(2)) configuration. Under constant flow rates, the performance of ...