The need of replacing Ni-based superalloys in the current aerospace industry for gas turbine applications has increased over the past few years. Composite materials like SiC offer better performance in gas turbine engine applications when compared to Ni-based superalloys. However, in harsh gas turbine engine applications, these composite materials need a protective layer to protect the material from steam and moisture environments. In this research Ytterbium Disilicate, a rare earth material is used as an Environmental Barrier Coating (EBC) to protect the composite substrate material from these harsh environments. The main objective of this research is to study the effect of thermal spray parameters and the functional properties of the coatings. Suspension Plasma Spraying (SPS) was used to spray topcoat materials and since the SPS spray parameters were yet to be developed through iterations in different spray trials, the experiments were carried out in two steps: 1. Screening Suspension Plasma Spray (SPS) Parameters for the topcoat:- Spray Trial 1- Spray Trial 22. Coating Investigation. Further, coating microstructure was evaluated for desirable coating properties. Other tests such as erosion tests, adhesion tests, porosity measurement, hardness tests, and heat treatment were also carried out to better understand the behavior of the coatings. Influence on spray parameters and its effect on coating’s features was also investigated.