The phenomenon of destruction of silica fiber cladding by the fiber fuse effect has been observed for the first time to the authors' knowledge. Experiments on the optical discharge propagation along a fiber were conducted with fibers of decreased cladding thickness. The destruction of fiber cladding led to expansion of the optical discharge plasma and to a decrease of its density. This resulted...

A Ni60 cladding layer with addition of 6.0% CeO2 was prepared on 35CrMoV steel by laser technology. The sample placed at 500 °C, 600 °C and 700 for 60 min to explore the effects heat treatment tribological properties composite coating. microstructure, phase composition, microhardness coating were characterized optical microscopy scanning electron (SEM), X-ray diffraction (XRD), micro-Vickers ha...

A TC4 composite coating reinforced by SiC ceramic phase and MoS2 self-lubricating was prepared on a muzzle brake laser cladding to improve its wear resistance properties. In this study, we investigated the microstructure behavior of coating. The results show that consisted equiaxed grains with grain sizes ranging from 102.39 255.31 ?m surface columnar bottom. mesh basket were mainly ?-Ti ?-Ti p...

In order to improve the wear resistance of 27SiMn steel substrate, Fe-based alloy coatings were prepared by laser cladding technology in present study. comparison conventional gravity powder feeding (GF) process, high-speed (HF) process was used prepare coating on substrate. The effect diversified energy composition materials microstructure and properties systematically studied. X-ray diffracto...

In this study, duplex surface treatments were used to prepare a ZrO2/Cr bilayer coating on zirconium alloy cladding for enhancing the wear and corrosion behaviors. The cross-section morphology of coated Zr-4 was characterized; results show that Cr- ZrO2/Cr-coated samples had similar morphology, more obvious undulates could be observed than pure Cr owing rough plasma electrolytic oxidation coati...

The electrochemical behavior and passive film properties of Hastelloy C22 alloy, laser-cladding coating, Ti–6Al–4V alloy in sulfuric acid dew-point corrosion environment were investigated through a combination measurements surface analyses. coating exhibited similar passivation repassivation without pitting corrosion, resulting from with bilayer structure consisting Cr2O3-dominated compact inne...

An analysis of optical properties of fundamental-mode in waveguide tapered fibers is theoretically investigated and realized in this paper. The waveguide device is tapering an SMF-28 fiber to few tens of micrometers of diameter. For discussing the cladding size of waveguide structure affects the fundamental-mode cutoff (FMC) and the optical characteristics of the devices, to etch outer cladding...

Cr-coated Zr-alloys are a near-term cladding concept to improve reactor safety during accident scenarios. Burst and steam oxidation behavior of bare Zirlo claddings were examined under simulated loss-of-coolant conditions. The 4.4 µm coating had no substantial effect on ballooning or opening geometry but did increase burst temperatures at higher pressures. reduced the compared specimens, in reg...

Biometallic materials are widely used in medicine because of excellent mechanical properties. However, biometallic limited the application biomaterials due to their lack bioactivity. To solve this problem, a gradient bioceramic coating doped with diatomite (DE) was successfully fabricated on surface Ti6Al4V alloy by using broadband-laser cladding process improve bioactivity metal materials. As ...