Abstract A low-diffusion (Ni,Pt)Al coating with Re-base diffusion barrier was prepared on a second-generation single-crystal superalloy via electroplating and gaseous aluminizing, in which the electroplating consisted of depositing Ni-Re and Pt, sequentially. Compared with normal (Ni,Pt)Al, cyclic and isothermal oxidation performances of the coating with Re-base DB were evaluated at 1100 °C in static air. It is indicated that the Re-base DB contributed to better oxidation resistance and lower inter-diffusion extent, where the thickness of secondary reaction zone decreased by 49 % after 1000 h isothermal oxidation. Mechanisms responsible for the improved oxidation performance and the role of Re-base DB are discussed.

中文翻译：

---

具有 Re-base 扩散阻挡层的低扩散 Pt 改性铝化物涂层的制备及氧化性能

摘要 通过电镀和气态渗铝在第二代单晶高温合金上制备了具有Re基扩散阻挡层的低扩散(Ni,Pt)Al涂层，其中电镀包括依次沉积Ni-Re和Pt。与普通 (Ni,Pt)Al 相比，Re-base DB 涂层在 1100 °C 静态空气中的循环和等温氧化性能进行了评估。这表明 Re-base DB 有助于更好的抗氧化性和更低的相互扩散程度，其中二次反应区的厚度在 1000 h 等温氧化后减少了 49%。讨论了提高氧化性能的机制和 Re-base DB 的作用。