Engine turbine blades Pocket energy concentration Spallation Thermal barrier coating
Chinese Society for Composite Materials
YUAN, B. ... et al, 2017. The mechanics of interface fracture in layered composite materials: (6) spallation of thermal barrier coatings of turbine blades. 21st International Conference on Composite Materials (ICCM-21), Xi'an, China, 20th-25th August 2017.
It is consensus that local spallation failures in thermal barrier coatings (TBCs) are determined synergistically by many factors. The present experimental test results confirm a completely new spallation failure mechanism for the electron beam-physical vapour deposited (EB-PVD) TBCs on
engine turbine blades, which is hypothesized in the latest work [1, 2] for the study of thin film spallation. That is, the spallation is driven by pockets of energy concentration (PEC). This paper reports the experimental study.