TY - JOUR
T1 - Comparative study on effect of oxide thickness on stress distribution of traditional and nanostructured zirconia coating systems
AU - Abbas, Musharaf
AU - Guo, Hongbo
AU - Ramzan Shahid, Muhammad
PY - 2013/1
Y1 - 2013/1
N2 - Numerical based assessment of traditional and nanostructured yttria stabilized zirconia (YSZ) thermal barrier coating systems (TBCs) has been carried out with varying thickness of thermally grown oxide (TGO). Radial, axial and shear stresses are determined for both coatings and are presented in comparison with few novel and interesting results. Elastic strain energy for TGO failure assessment is determined from calculated stress within TGO for varying thickness. Radial stresses at TGO/bond coat interface and maximum axial stresses in nanostructured zirconia coatings are found to be lower than in traditional YSZ up to a critical TGO thickness of 6 -7 μm, after which stresses in nanostructured zirconia coatings increase considerably. However, radial compressive stresses in nanostructured TBCs are lower in all TGO thickness cases and shear stresses are slightly higher with relatively more prominent difference at high oxide thickness.
AB - Numerical based assessment of traditional and nanostructured yttria stabilized zirconia (YSZ) thermal barrier coating systems (TBCs) has been carried out with varying thickness of thermally grown oxide (TGO). Radial, axial and shear stresses are determined for both coatings and are presented in comparison with few novel and interesting results. Elastic strain energy for TGO failure assessment is determined from calculated stress within TGO for varying thickness. Radial stresses at TGO/bond coat interface and maximum axial stresses in nanostructured zirconia coatings are found to be lower than in traditional YSZ up to a critical TGO thickness of 6 -7 μm, after which stresses in nanostructured zirconia coatings increase considerably. However, radial compressive stresses in nanostructured TBCs are lower in all TGO thickness cases and shear stresses are slightly higher with relatively more prominent difference at high oxide thickness.
KW - Interfaces
KW - Residual stress
KW - Thermal barrier coatings (TBCs)
KW - Thermally grown oxides (TGO)
UR - https://www.scopus.com/pages/publications/84869092437
U2 - 10.1016/j.ceramint.2012.06.051
DO - 10.1016/j.ceramint.2012.06.051
M3 - 文章
AN - SCOPUS:84869092437
SN - 0272-8842
VL - 39
SP - 475
EP - 481
JO - Ceramics International
JF - Ceramics International
IS - 1
ER -