TY - JOUR
T1 - Nanomechanical properties of plasma-sprayed nanostructured and conventional 8YSZ thermal barrier coatings
AU - Zhou, Feifei
AU - Wang, Shun
AU - Xu, Baosheng
AU - Wang, Yiguang
AU - Zhang, Xiaofeng
AU - Wang, You
N1 - Publisher Copyright:
© 2022 Elsevier Ltd and Techna Group S.r.l.
PY - 2022/12/15
Y1 - 2022/12/15
N2 - Nanostructured thermal barrier coatings (TBCs) have become a noteble research field for the development of high-performance thermal protection coatings. The mechanical properties are essential for TBCs, which determine the functionality, reliability and durability of coatings. In this article, the nanostructured 8YSZ (n-8YSZ) and conventional 8YSZ (c-8YSZ) coatings were fabricated by atmospheric plasma spraying (APS). The goal of the work is to do an evaluation and comparison of the nanomechanical properties of n-8YSZ and c-8YSZ coatings. The microstructure of coatings was observed by scanning electron microscopy and the nanomechanical properties was characterized using nano-indenter. Results indicate that the microstructure of the n-8YSZ coating exhibits bi-modal distribution while the microstructure of the c-8YSZ coating shows mono-modal distribution. The elastic indentation work (We) is 11.952 ± 1.243 nJ and the plastic indentation work (Wp) is 20.266 ± 5.594 nJ for the n-8YSZ coating. Meanwhile, the We is 11.753 ± 0.634 nJ and the Wp is 16.508 ± 3.000 nJ for the c-8YSZ coating. The microstructure of the coating has little effect on We, but much on Wp. The dissipation ratio of plastic deformation work (η) is 0.621 ± 0.046 for the n-8YSZ coating and 0.579 ± 0.042 for the c-8YSZ coating. Therefore, it can be predicted that the n-8YSZ coating is superior to the c-8YSZ coating in terms of erosion performance.
AB - Nanostructured thermal barrier coatings (TBCs) have become a noteble research field for the development of high-performance thermal protection coatings. The mechanical properties are essential for TBCs, which determine the functionality, reliability and durability of coatings. In this article, the nanostructured 8YSZ (n-8YSZ) and conventional 8YSZ (c-8YSZ) coatings were fabricated by atmospheric plasma spraying (APS). The goal of the work is to do an evaluation and comparison of the nanomechanical properties of n-8YSZ and c-8YSZ coatings. The microstructure of coatings was observed by scanning electron microscopy and the nanomechanical properties was characterized using nano-indenter. Results indicate that the microstructure of the n-8YSZ coating exhibits bi-modal distribution while the microstructure of the c-8YSZ coating shows mono-modal distribution. The elastic indentation work (We) is 11.952 ± 1.243 nJ and the plastic indentation work (Wp) is 20.266 ± 5.594 nJ for the n-8YSZ coating. Meanwhile, the We is 11.753 ± 0.634 nJ and the Wp is 16.508 ± 3.000 nJ for the c-8YSZ coating. The microstructure of the coating has little effect on We, but much on Wp. The dissipation ratio of plastic deformation work (η) is 0.621 ± 0.046 for the n-8YSZ coating and 0.579 ± 0.042 for the c-8YSZ coating. Therefore, it can be predicted that the n-8YSZ coating is superior to the c-8YSZ coating in terms of erosion performance.
KW - Atmospheric plasma spraying
KW - Dissipation ratio of plastic deformation work
KW - Nanomechanical properties
KW - Nanostructured 8YSZ coatings
UR - https://www.scopus.com/pages/publications/85139297031
U2 - 10.1016/j.ceramint.2022.09.229
DO - 10.1016/j.ceramint.2022.09.229
M3 - Article
AN - SCOPUS:85139297031
SN - 0272-8842
VL - 48
SP - 37483
EP - 37487
JO - Ceramics International
JF - Ceramics International
IS - 24
ER -