A simple method for measurement of shear delamination toughness in environmental barrier coatings

作者：Aoki Yuto; Inoue Junya; Kagawa Yutaka^*; Igashira Kenichiroh

来源：Surface and Coatings Technology, 2017, 321: 213-218.

DOI：10.1016/j.surfcoat.2017.03.073

• Environmental barrier coatings (EBCs)
• Delamination
• Toughness
• SiC/SiC
• Test method
• Shear loading

A simple technique for measurement of delamination toughness in environmental barrier coatings (EBCs) under shear loading has been developed. The technique overcomes micro damage accumulation properties of CMC substrate and a delamination toughness with a phase angle of similar to 80 degrees could be obtained using a simple fixture. Demonstration of the present procedure is carried out using a BSAS/mullite + BSAS/Si standard EBC layer on a three-dimensional woven fabric SiC/SiC composite substrate. The delamination path suggests that it is possible to apply the method to wavy EBC coatings and also to thermal barrier coatings.

• 出版日期2017-7-15