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研究了纯镍及其表面磁控溅射Ni 0 5Y微晶涂层在 1 0 0 0℃空气中的恒温氧化和循环氧化行为 .通过扫描电镜 (SEM)和透射电镜 (TEM)对涂层以及表面NiO氧化膜的形貌和结构进行了研究 .此外 ,用激光拉曼 (Raman)谱对 2种样品表面NiO氧化膜内应力大小进行了测量 ,结果表明 :Ni 0 5Y微晶涂层与基体镍相比有更低的氧化增重速率 ,表面NiO氧化膜的晶粒尺寸明显减小 ,膜的高温塑性得以改善 .同时 ,氧化膜内的压应力水平也有所降低 ,因而改善了NiO氧化膜的粘附性和保护性 .磁控溅射涂层的微晶结构以及稀土元素钇的存在均有助于提高涂层的抗高温氧化性能
The oxidation and cyclic oxidation behavior of pure nickel and its surface magnetized Ni 0 5Y microcrystalline coating in air at 100 ℃ were investigated by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) The surface NiO oxide film morphology and structure were studied.In addition, laser Raman (Raman) spectra of two samples NiO oxide film surface stress measurements showed that: Ni 0 5Y microcrystalline coating and the substrate Nickel has a lower rate of oxidation and weight gain, the surface of the NiO oxide film grain size was significantly reduced, high temperature plasticity of the film can be improved at the same time, the oxide film within the compressive stress level also decreased, thus improving the NiO oxide film Of the adhesion and protection of magnetron sputtering coating of the microcrystalline structure and the presence of rare earth yttrium are helpful to improve the coating’s high temperature oxidation resistance