熱遮へいコーティング膜の変形特性のX線的研究

概要

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Two kinds of thermal barrier coating films with 8 wt% yittria-zirconia were made by atmosphere plasma spraying (APS film) and by low-pressure plasma spraying (LPS film). These films were removed from substrates. The mechanical and X-ray elastic constants of the APS and LPS films were measured by tensile and bending deformation. For the APS film, a lamella structure was formed with solidification of molten zirconia and lamellae were interlaced with each other. Sliding between lamellae is restrained so that the mechanical elastic constants by bending deformation are about the same as that by tensile deformation. For the LPS film, lamellae were piled up regularly and the thickness of the lamellae was thinner than that of the APS film. The mechanical elastic constant of the LPS film measured by bending deformation was lower than that by tensile deformation, because of sliding between lamellae. On the other hand, the X-ray elastic constants of the APS and LPS films were nearly identical, because the X-ray elastic constant was obtained from the strain of the crystalline phase in response to the applied stress.
社団法人日本機械学会の論文
2001-08-25