Simulation of reaction-diffusion phenomena occurring between Ir coating and Ni-Al alloy substrate using phase-field model

Machiko Ode*, Taichi Abe, Hideyuki Murakami, Yoko Yamabe-Mitarai, Hidehiro Onodera

*この研究の対応する著者

研究成果: Article査読

抄録

It is very important to understand the development of the microstructure in the interdiffusion zone between coatings and superalloy substrates for designing bond coat materials. In this study, the reaction-diffusion phenomena in the Ir-coating/Ni -Al binary substrate system are simulated using the phase-field model. The thermodynamic database developed based on the CALPHAD method is directly incorporated in the simulation. The effect of coating thickness on the growth of the secondary precipitated β-phase is discussed. In the case of a semi-infinite system, the thickness of the β-phase increases proportionally with the square root of time. In the case of a thin (1 μm thick) coating, inconstant β-phase growth is observed. It is suggested that the phase growth is related to the change in the β-phase fraction, which is derived from a thermodynamic line calculation from the substrate composition to pure Ir.

本文言語English
ページ(範囲)523-526
ページ数4
ジャーナルInternational Journal of Materials Research
101
4
DOI
出版ステータスPublished - 2010 5月 28
外部発表はい

ASJC Scopus subject areas

  • 凝縮系物理学
  • 物理化学および理論化学
  • 金属および合金
  • 材料化学

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