for a fiber optical surface plasmon resonance (spr) sensor a short part of its cladding should be removed to coat a thin layer of a metal. usually this is problematic when an optical fiber with small core diameter is used. in this paper, a new method using µliter droplet of the hf acid for short fiber optical taper fabrication is reported. using this method in a multi-mode optical fiber with th...

Abstract In-situ three-point bending tests and finite element modeling based on the cohesive zone model were developed to study stress evolution cracking behavior of Cr coated Zr-4 alloy for accident tolerant fuel claddings. The initiation propagation micro-cracks captured by in-situ observation predicted numerical simulation. results showed that vertical cracks first initiated from coating sur...

Free from toxic elements biomaterial potentially applicable for load bearing biomedical implants was obtained the first time by laser cladding of S520 bioactive glass onto ultrafine-grained commercially pure titanium. The process affected refined structure substrate inducing martensitic transformation near its surface. ?’ acicular martensite gradually passes into relatively large grains with in...

In order to improve the work efficiency and save resources in process of laser cladding on H13 steel surface, based COMSOL, by combining computer simulation experiment, a plane continuous heat source model was used simulate analyze temperature stress field. The optimal power scanning speed were obtained. It is found that thermal sampling points increases with increase speed. Because existence s...

In recent years, the coating prepared by laser cladding has attracted much attention in field of wear research. this work, AlCrFeNiMo0.5Six (x=0, 0.5, 1.0, 1.5, 2.0) high-entropy alloy coatings were designed and on Q235 steel cladding. The effect Si content microstructure, microhardness resistance was studied detail. results indicate that show an excellent bonding between substrate layer. are c...