Characterization of a cyclic displacement instability for a thermally grown oxide in a thermal barrier system

The displacement of the thermally grown oxide in thermal barrier systems upon temperature cycling

“…16) [20]. Given the existence of weak deposition planes in the TBC [15,17,43], this stress is sufficient to create cracks, which locally eliminate the constraint of the TBC, allowing the instability to propagate at a rate essentially the same as that absent in the TBC (Fig. 3).…”

Creases on the interface between two soft materials

“…They exist in composite materials 1 , geological strata 2,3 , electronic devices 4 , biological tissues 5,6 and soft actuators 7 . In many cases, stresses arise due to differences in thermal expansion [8][9][10] , chemical reactions 11 , growth 5,12 , swelling 13 , or mechanical pre-strains 14 . Such mismatches may cause buckling instabilities 1, 10,15,16 , which can reduce the strength of structures 1,10,15,16 and lead to debonding of the interfaces 8,9,17 .…”

Anisotropic TGO rumpling in EB-PVD thermal barrier coatings under in-phase thermomechanical loading

“…Thermal barrier coatings (TBCs) are often used to protect metallic components from high temperature service environments [1][2][3][4][5][6]. Degradation of TBCs and the underlying substrate can be caused by many factors.…”