As-coated thermal barrier coating: structure and chemistry

作者：Chen Y; Reed R C; Marquis E A^*

来源：Scripta Materialia, 2012, 67(9): 779-782.

DOI：10.1016/j.scriptamat.2012.06.023

• Thermal barrier coatings
• Pt-diffused bond coat
• Superalloy
• Atom probe tomography

A thermal barrier coating in the as-processed state is characterized using transmission electron microscopy and atom probe tomography. The structure of the thermally grown oxide correlates strongly with that of the bond coat with alternating regions of mixed alumina/zirconia in contact with gamma%26apos; and coarse-grained alumina in contact with gamma. Significant Pt and A1 diffusion fields are present in gamma, but not in gamma%26apos;. The mechanism by which the structure and chemistry evolves at the TGO/bond coat interface is elucidated.

• 出版日期2012-11