ABSTRACT NiCrAlY coating was deposited on the IN-738LC Ni-based superalloy by cathodic arc deposition at the substrate temperatures of 400°C and 700°C. The effects of the substrate temperature on the microstructure and the isothermal oxidation behaviour of the coatings were then investigated. SEM image and XRD analysis were used to characterize the deposited coatings. It was found that when the substrate temperature was raised from 400°C to 700°C, the degree of coating crystallinity was increased from 23% to 58%. After the 20-hr oxidation at 1000°C in air, the γ′-depletion layer was formed in the substrate. The growth rate constants of the γ′-depletion layer after the 100-hr oxidation were 1.3 10−4 μm (sb)−1 and 6.4 10−5 μm (sb)−1 for the deposited coatings at 400°C and 700°C, respectively. The results, therefore, indicated that with increasing the substrate temperature from 400°C to 700°C, the oxidation resistance was improved.

中文翻译：

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基体温度对NiCrAlY涂层氧化行为的影响

摘要 NiCrAlY 涂层通过阴极电弧沉积在 400°C 和 700°C 的基板温度下沉积在 IN-738LC 镍基高温合金上。然后研究了基体温度对涂层微观结构和等温氧化行为的影响。SEM图像和XRD分析用于表征沉积的涂层。发现当基板温度从400℃升高到700℃时，涂层结晶度从23%提高到58%。在空气中 1000°C 氧化 20 小时后，在衬底中形成 γ'-耗尽层。沉积涂层在 400°C 和 700° 氧化 100 小时后，γ'-耗尽层的生长速率常数分别为 1.3 10-4 μm (sb)-1 和 6.4 10-5 μm (sb)-1 C、分别。结果，因此，