**5. Conclusions**

The effects of bond coat species on the thermal durability of EB-PVD TBC samples are investigated through cyclic thermal exposure tests. The major conclusions are summarized below.


**Author Contributions:** Conceptualization, Z.L., Y.-G.J. and J.Z.; methodology, Z.L., Y.-G.J. and J.Z.; software, J.Z. and A.G.; validation, Z.L., H.-M.P., J.S.K. and G.L.; investigation, Z.L., J.S.K. and G.L.; resources, Z.L. and Y.-G.J.; writing—original draft preparation, Z.L. and G.L.; writing—review and editing, Y.-G.J., G.L. and J.Z.; supervision, Y.-G.J. and J.Z.; project administration, Y.-G.J.; funding acquisition, Z.L. and Y.-G.J.

**Funding:** This work was supported by the "Human Resources Program in Energy Technology" of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), with financial support from the Ministry of Trade, Industry and Energy, Korea (No. 20194030202450), by the National Nature Science Foundation of China (Nos. 51702145), Youth Foundation and Innovation Group Project from the University of Science and Technology Liaoning (2016QN03 & 2017TD01).

**Acknowledgments:** The authors wish to acknowledge Jing Zhang for providing the FE analysis in the present study.

**Conflicts of Interest:** The authors declare no conflict of interest.
