Multilayered ruthenium-modified bond coats for thermal barrier coatings | Zendy

B. Tryon | Zendy; Qiang Feng | Zendy; Tresa M. Pollock | Zendy; R.G. Wellman | Zendy; J.R. Nicholls | Zendy; K. S. Murphy | Zendy; Zhenjun Yang | Zendy; Carlos G. Levi | Zendy

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Multilayered ruthenium-modified bond coats for thermal barrier coatings

Author(s) -

B. Tryon,

Qiang Feng,

Tresa M. Pollock,

R.G. Wellman,

J.R. Nicholls,

K. S. Murphy,

Zhenjun Yang,

Carlos G. Levi

Publication year - 2006

Publication title -

metallurgical and materials transactions a

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.862

H-Index - 155

eISSN - 1543-1940

pISSN - 1073-5623

DOI - 10.1007/bf02586169

Subject(s) - thermal barrier coating , materials science , fabrication , nial , coating , yield (engineering) , ruthenium , composite material , chemical vapor deposition , deposition (geology) , phase (matter) , layer (electronics) , chemical engineering , nanotechnology , chemistry , intermetallic , catalysis , organic chemistry , medicine , paleontology , alternative medicine , alloy , pathology , sediment , engineering , biology

Diffusional approaches for fabrication of multi-layered Ru-modified bond coats for thermalbarrier coatings have been developed via low activity chemical vapor deposition and high activitypack aluminization. Both processes yield bond coats comprising two distinct B2 layers, based onNiAl and RuAl, however, the position of these layers relative to the bond coat surface is reversedwhen switching processes. The structural evolution of each coating at various stages of thefabrication process has been and subsequent cyclic oxidation is presented, and the relevantinterdiffusion and phase equilibria issues in are discussed. Evaluation of the oxidation behavior ofthese Ru-modified bond coat structures reveals that each B2 interlayer arrangement leads to theformation of α-Al 2 O 3 TGO at 1100°C, but the durability of the TGO is somewhat different and inneed of further improvement in both cases

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