Silicon carbide based plasma sprayed coatings

Aqueous suspension processing of multicomponent submicronic Y-TZP/Al 2 O 3 /SiC particles for suspension plasma spraying

“…SiC is reported as the most efficient ceramic self-healing material, although other metals and alloys are being investigated [6,9,12]. However, self-healing functionality in a TBC has barely started to be developed and, one of the specific challenges is that silicon carbide cannot be easily deposited by plasma spray because it oxidises in the torch before melting [12,13].…”

“…However, self-healing functionality in a TBC has barely started to be developed and, one of the specific challenges is that silicon carbide cannot be easily deposited by plasma spray because it oxidises in the torch before melting [12,13]. The sealing ability (such as in silicon carbide) consists in full filling the cracks originated in the coating, which are produced by the fatigue work of extreme temperatures and aggressive hot gases, during the service time.…”

In-situ fabrication of ZrB2–SiC/SiC gradient coating on C/C composites

“…Yao et al [11] prepared a ZrB 2 eSiC composite coating on the surface of SiC (by pack cementation) coated C/C composites via supersonic plasma spraying process. However, lots of oxides and pores had been found in the coating that originating from the oxidation of SiC and ZrB 2 , as well as the decomposition of SiC in the spraying process under atmosphere [12,13].…”

Formation of carbon composite coatings by plasma spraying

“…The deposition efficiency, interface bonding and mechanical properties of sprayed coatings increases with the increase of particle velocity and temperature [18e25]. It was demonstrated that the as-sprayed coatings show elemental composition different from the initial feedstock powders [7,8,13]. Variation of plasma gun power allows changing and controlling the plasma jet temperature and, consequently, to adjust the melting degree of the feedstock powders [14,25].…”

“…Therefore, it is generally considered that the fully melted particles will lead to production of dense with low pore volume coatings [14]. The nature and elemental composition of the initial powders are directly related to the melting temperature [7,13,14]. Therefore it is very important to obtain the optimal spraying process parameters for individual feedstock powders.…”