Highly crystalline feedstock hydroxyapatite (HA) particles with irregular shapes were spheroidized by plasma spraying them onto the surface of ice blocks or into water. The spherical Ca-P particles thus produced contained various amounts of the amorphous phase which were controlled by the stand-off distance between the spray nozzle and the surface of ice blocks or waiter. The smooth surface mor...

The goal of the present study is to prepare a room temperature cured hydrophobic and self-cleaning nano-coating for power line insulators. As a result, the installed insulators operating in power lines can be coated without being removed from the circuit and without the need to cut off power. For this purpose, hydrophobic silica nanoparticles were synthesized by sol-gel method using TEOS and HM...

Titanium coated PEEK cages incorporate the advantages of both PEEK, which offers a native-like elastic modulus and a radiolucent behaviour, and Titanium which provides improved biocompatibility and promotes osseointegration. In this study, we evaluated the response of Titanium plasma sprayed PEEK cages to provide safe support of the lumbar spine and promote bony fusion.

There is currently a lack of suitable methods non-destructive quality assessment thermally sprayed coatings. Therefore, this study investigates the suitability polarization measurements that are adapted to special needs coatings for testing. For purpose, gel electrolyte containing 3.5% NaCl and measuring cell based on three-electrode arrangement were developed prevent corrosion medium from infi...

Combinations of NiCoCrAlY APS and high-velocity oxygen fuel (HVOF) bond coatings were deposited on alloy 247 disk substrates with yttria-stabilized zirconia (YSZ) top to assess the benefit air plasma sprayed (APS) ‘flash’ coatings. Using 1-h cycles at 1100 ℃ in 10% H2O HVOF-only APS-only as a baseline, it was found that flash extended average coating lifetime by 16% 35% thicker performing best....

Thermal barrier coatings (TBCs) are commonly used to protect gas turbine components from high temperatures and oxidation. Such consist of ceramic top coats metallic bond coats. The mismatch in thermal expansion the coat, coat component material is one main factor leading failure coating system. Columnar-structured offer an enhanced tolerance strain during cycling. On a flat coated surface, thes...