Fabrication of high temperature grating on thermal barrier coatings based on solute-solvent separation soft lithography. Issue 1 (January 2018)

• Record Type: Journal Article
• Authors: Fan, Bozhao; Xie, Huimin
• Is Part Of: Theoretical & applied mechanics letters. Volume 8:Issue 1(2018)
• Page Start: 12
• Page End: 17
• Publication Date: 2018-01
• Subjects: Thermal barrier coatings -- High temperature grating -- Solute-solvent separation soft lithography -- Geometry phase analysis -- Deformation field measurement; Mechanics, Applied -- Periodicals; Mechanics, Analytic -- Periodicals; Mechanics, Analytic; Mechanics, Applied; Periodicals; 620.1
• DOI: 10.1016/j.taml.2018.01.004
• Languages: English
• ISSNs: 2095-0349

Abstract

HIGHLIGHTS: An etched-SiO-film grating fabrication technique is developed to fabricate 600 lines/mm grating on the surface of thermal barrier coatings (TBCs) based on solute-solvent separation soft lithography. The grating on TBCs is heated at the temperature ranging from 300°C to 1000°C for examining the oxidation resistibility to high temperature. Displacement field and strain field around crack on ceramic coating in TBCs with grating are investigated using geometry phase analysis (GPA). The SiO grating with a remarkable adhesion strength is suitable to be used for inhomogeneous deformation measurement. ABSTRACT: In this study, an etched-SiO-film grating fabrication technique based on solute-solvent separation soft lithography is developed. By using this new technique, high temperature grating with frequency of 600 lines/mm is successfully fabricated on the surface of thermal barrier coatings (TBCs). During the fabrication process, the microstructure and chemical compositions of ceramic coating before and after polishing is analyzed with a digital microscope and the energy dispersive X-ray spectroscope (EDS) in scanning electron microscope (SEM). And then the grating on TBCs is heated at the temperature ranging from 300°C to 1000°C for examining the high temperature resistance. In the practical application, the displacement and strain field around the crack on the ceramic surface are investigated with geometry phase analysis (GPA). The successful results verify that the etched-SiO-film grating has a good oxidation resistance and can be applied to high temperature deformation measurement of TBCs.