This paper describes the application of thermal spray techniques to produce resistance heating elements suitable for applying very large heat fluxes to solid surfaces. The surface to be heated is electrically insulated by deposition of a ceramic layer onto which a thin metallic layer is deposited; the metallic layer serves as the heating element. Each layer has a thickness in the range of 75 to...

OBJECTIVES To evaluate the bond strength of dental resin agent to zirconia ceramic after surface pre-treatment with different techniques. METHODS Specimens of hot isostatic pressed yttrium-oxide-partially-stabilized zirconia blocks (ZF) were fabricated (Procera Zircon, Nobel Biocare, Sweden) and compared to glossy dense zirconia blocks (ZG). Four groups of specimens with different surface tre...

Coatings prepared from nanosized powders were obtained by spraying ethanol-based colloidal solutions into a plasma plume. The powders investigated included 40 nm γ -Al2O3, 75 nm 8 wt% Y2O3-ZrO2, and 750 nm 25 wt% CeO2-ZrO2. Spray distances from approximately 50 to 63 mm were required to achieve significant coating deposition. As observed in the TEM, the typical lamella morphology of air plasma ...

TiISiC, MMC monotapes have been successfully fabricated by vacuum plasma spraying. The as-sprayed MMC monotapes have a uniform fibre distribution, dense matrix and no fibre-matrix interfacial reaction. The effects of processing parameters such as H, flow rate, plasma current, chamber pressure and spray distance on the monotape temperature, porosity and fibre infiltration have been evaluated qua...

Herein, a NiCrAl coating was prepared on the AZ91D magnesium alloy by cold spraying technology. The microstructure, wear resistance, and corrosion resistance of sprayed were studied compared with two coatings plasma spraying. results showed that porosity two-plasma 3.21% 2.66%, respectively, while only 0.68%. hardness (650 HV0.1) higher than those (300 HV0.1, 400 HV0.1). In abrasion test, lower...

Foam-like NiMo coatings were produced from an inexpensive mixture of Ni, Al, and Mo powders via atmospheric plasma spraying. The deposited onto stainless-steel mesh forming a highly porous...

This article aims to address the issue of simulating plasma-jet by using an innovative computational approach namely the Lattice Boltzmann Method (LBM) from the point of view of extending the applications to simulating flows with temperature-dependent physical parameters. The work focuses on the phenomena occurring in plasma-jet that define the link between LBM lattice and physical lattice. Hig...