**6. Conclusion**

In the present chapter, the potential utilization of gadolinium zirconate (GZ) for thermal barrier coating (TBC) applications had been discussed. The production methods, design process, thermal and mechanical properties, failure mechanism, CMAS and hot corrosion resistance, and laser surface modification process of GZ-based TBCs were evaluated in this chapter.

A variety of coating techniques such as atmospheric plasma spraying (APS), solution plasma spraying (SPS), and electron beam-physical vapor deposition (EB-PVD) exist for the production of GZ-based TBCs. The production technique has a significant influence both on microstructure and properties of the GZ-based TBCs. APS is an effective technique to achieve characteristic TBC structure. Thermal conductivity value of the GZ-based TBCs is lower than that of yttria-stabilized zirconia (YSZ). It is possible to further improve the thermal conductivity and thermal failure properties of the GZ-based TBCs by using different coating architectures such as multilayer and functionally graded designs. GZ-based TBCs have a significant advantage in terms of its CMAS and hot corrosion resistance. After laser surface modification of GZ-based TBC, a thin, dense, and smooth remelted layer can be acquired. Furthermore, an equiaxed continuous segmented crack network forms on the surface of laser surface-modified GZ-based TBC. As a result, it was concluded that GZ is an important and promising alternative TBC material.
