2017•Loughborough University Institutional Repository (Loughborough University)Open access

The mechanics of interface fracture in layered composite materials: (6) spallation of thermal barrier coatings of turbine blades

Bo Yuan, Christopher M. Harvey, Rachel C. Thomson, Gary W. Critchlow, Simon Wang

Abstract

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\nengine 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.

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Key concepts: Spallation, Thermal barrier coating, Materials science, Turbine blade, Composite material, Work (physics), Fracture mechanics, Turbine