The microstructure and local mechanical characteristics of thermal spray ferrous coatings have been determined. The emphasis has been on coatings made by the high velocity oxyfuel (HVOF) process, especially the role of Al alloy additives. The oxide phase present in the material and preferred pathways for local cracking and separation have been determined. Thin intersplat oxide layers emerge as ...

The paper reports on studies and results about the implementation of a novel type of Cryogenic Current Comparator (CCC), designed for work at liquid nitrogen temperature. The studies are particularly aimed at the realization of the CCC shield by means of an extended thick film of the YBCO high-temperature superconductor (HTS), deposited onto a metallic substrate with the HVOF technique. Recent ...

Inconel and micro nano WC-12Co powders were deposited on AISI 4140 carbon steel by high-velocity oxy fuel (HVOF) coating followed laser surface modification. Laser power scan speed varied at different levels. Microstructure microhardness investigated. Nanocoatings performed better than microcoatings. Nanostructured WC powder coatings exhibited greater hardness compared to microstructured coatin...

Material deterioration due to erosion and oxidation in high-temperature environments is a major cause of wear power plants, aircraft engines petrochemical industries. NiCrSiB based surface coatings using thermal spray techniques such as High-Velocity Oxy-Fuel (HVOF) offer cost-effective route improve the tribological properties for range substrate materials. The study investigates resistance HV...

A comprehensive experimental study on the high-velocity oxygen-fuel (HVOF) sprayed tungsten carbide/cobalt (WC/Co) deposits using laser cladding was conducted. response surface methodology based a central composite design used to analyze, predict and optimize WC/Co of laser-based HVOF coatings. The morphologies microstructures clads were characterized optical microscope, scanning electron micro...