研究了IN738镍基高温合金的铂改性渗铝涂层在1100℃空气 中的氧化行为.铂的存在，通过阻止合金元素穿过Al2O3膜向外扩散，改善Al2O3膜 与基体的结合力，抑制γ′-Ni3Al相的形成，推迟涂层的高温退化，同时讨论铂的作用机 制.
The oxidation of Ptmodified aluminide coatings on nickelbase superalloy IN738 has been studied in static air at 1100℃ up to 14 00 h.The presence of Pt significantly suppressed the formation of γ′Ni3Al, promoted selective oxidation of aluminum by preventing the transport of other el ements in the substrate outwards to Al2O3 scale and forming purer,slowlygr owing and adherent Al2O3 scale.
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