is extensively used in hi-tech industries like aerospace and nuclear energy as well as conventional industries like textiles, chemicals, plastics, and paper mainly as wear-resistant coatings in crucial components.
In the present work, the NiCrBSi coating with the thickness of 800 [micro]m was prepared on the AISI1045 substrate by plasma spraying
. And the thick remelting coating was produced by tungsten inert gas (TIG) arc process.
In plasma spraying
technique, when argon, hydrogen or nitrogen gases are used, oxidation problem is minimized.
Understanding plasma spraying
, Journal of Physics D: Applied Physics 37(9): R86-R108.
Among the topics are cost effective developments for fabricating titanium components, consolidating blended titanium/magnesium powders by microwave processing, the economic surface treatment of titanium alloys to improve their resistance against environmental high temperature, titanium-based composite coatings deposited by high velocity oxygen fuel and plasma spraying
methods, and phase constitution and heat treatment behavior of low-cost titanium/manganese system alloys.
It is worth mentioning that, during air plasma spraying
, nanopowders (particularly nano ceramic powders) could adhere to the walls of the feeding system making it extremely difficult to move them towards the plasma torch due to their high specific area and low mass.
The advantages of plasma spraying
include formation of ceramic microstructures with fine, equiaxed grains without columnar defects, deposition of graded coatings with a wide compositional variety, formation of thick coatings with only modest investment in capital equipment, and design capability for free standing thick forms of monolithic and mixed ceramics in near net shape configuration.
(PS) is a process that combines the generation of a plasma jet, the injection and melting of surfacing materials within the plasma jet, and finally the formation of a coating through the impingement of the surfacing materials on the substrate.
With its origins in the nuclear industry, Zircotec's ThermoHoldA technology is applied to the exhaust system by plasma spraying
to prevent heat being radiated by the 6.0 litre V12 engine.
induced changes of calcium phosphate ceramic characteristics and the effect on in vitro stability.
Comparing the technology of laser cladding with the conventional technology of plasma spraying
, the dilution and diffusion rate of laser cladding components are lower, more chemical compounds are formed, the hardness, strength and toughness is improved remarclaby in case of laser cladding.
parameters of the coatings are given in Table 3.