303 EB-PVD-TBCの界面力学特性に及ぼす界面の粗さと膜厚の影響(OS2-1 皮膜・薄膜のき裂・界面き裂,OS2 薄膜・皮膜とその膜構造の特性評価)

概要

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The effects of interface roughness and thickness of TBC on the interfacial mechanical properties of EB-PVD TBC were examined in BC as-sprayed and polished with 200 μm and 500 μm TBC thickness systems using a barb test method. The residual compressive stress in TBC layer was measured, by using the Raman spectroscopy. The interface toughness related to the interface roughness and the thickness of TBC. The interface toughness was larger for BC as-sprayed TBC system than for BC polished TBC one. The delamination of TBC propagated within TBC layer adjacent to the interface for BC as-sprayed TBC, for BC polished TBC at the interface between the TGO and the BC. Moreover, the interface toughness was larger in 500 μm thickness TBC than in 200 μm thickness TBC. The relation of interface toughness to interface roughness and thickness of TBC was associated with the interface residual compressive stress and the interface sliding friction during the delamination of TBC.
一般社団法人日本機械学会の論文
2007-10-24