A Facile Approach to Deposit Graphenaceous Composite Coatings by Suspension Plasma Spraying

Abstract

This paper demonstrates, for the first time ever, the deposition of graphenaceous composite coatings using an easy, yet robust, suspension plasma spraying (SPS) process. As a case study, a composite coating comprising 8 wt.% of yttria-stabilized-zirconia (8YSZ) and reinforced with graphene oxide (GO) was deposited on a steel substrate. The coatings were sprayed using an 8YSZ-GO mixed suspension with varied plasma spray parameters. Establishing the possibility of retaining the graphene in a ceramic matrix using SPS was of specific interest. Electron microscopy and Raman spectroscopy confirmed the presence of graphenaceous material distributed throughout the coating in the 8YSZ matrix. The experimental results discussed in this work confirm that SPS is an immensely attractive pathway to incorporate a graphenaceous material into virtually any matrix material and can potentially have major implications in enabling the deposition of large-area graphene-containing coatings for diverse functional applications.

New Design of Active Material Based on YInWO4-G-SiO2for a Urea Sensor and High Performance for Nonenzymatic Electrical Sensitivity

“…Therefore, the G band of graphene was observed in a similar position to that of GO. The D band is an indication of disorder, which may emerge from specific defects such as vacancies, grain boundaries, and amorphous carbon species . The intensity ratio of these two bands showed the quality of the product.…”

Incorporation of graphene nano platelets in suspension plasma sprayed alumina coatings for improved tribological properties

“…The suspension was fed axially in the plasma torch to deposit the coatings. A schematic illustration on processing of GNP incorporated ceramic matrix (YSZ) coatings via SPS is shown in our recent work [37]. Argon was used as the atomizing gas to deposit both the coatings.…”

“…Venturi et al also utilized graphene in the form of suspension feedstock to deposit coating on steel substrates using S-HVOF process, which demonstrated excellent wear resistance [35]. Recently, Ganvir et al also reported graphene retention in a YSZ matrix despite utilizing the relatively higher processing temperature technique of axial suspension plasma spray (A-SPS) [37].…”

Advanced Coatings by Thermal Spray Processes

“…A desire to further build on the SPS expertise has now led to dedicated efforts aimed at utilizing the SPS route to deposit various other oxides and carbides that can be potentially promising candidates for tribological applications. In this context, some early work has already been carried out with Al 2 O 3 , Cr 2 O 3 , Cr 3 C 2 , and TiC suspensions, as well as graphene [71][72][73]. These have yielded microstructures and properties that inspire confidence (Figure 9) to be further investigated in detail.…”