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【答案】应助回帖
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wxqtjw: 金币+50, 翻译EPI+1 2016-08-31 11:38:32
3.1.1 Microstructural features in specimens with different coatings
图1为不同的涂层系统横截面的微观结构图。图1中所有样品的基体(substrate)均为镍基高温合金。图1a为沉积态(as-deposited)下的EB单层（NiAl）涂层系统，图1a中NiAl涂层结合的比较致密，NiAl涂层与基体之间存在明显的界面(interface)。
Fig.1 showed microstructural features of cross section view from specimens with different coatings . The substrate used was Ni-based superalloy. Fig 1a showed as-deposited EB monolayer coating was in close contact with the substrate, however, an apparent interface between the coating layer and the substrate was clearly visible.
图1b为沉积态下的EB双层（NiAl和YSZ）涂层系统，从图1b可以看出，在NiAl涂层与基体之间，陶瓷层（YSZ）与金属层（NiAl）之间，均存在比较清晰的宏观界面，陶瓷层（YSZ）的柱状晶结构更加明显，而金属层（NiAl）结合的比较致密。
Fig 1b showed as-deposited EB double-layer (NiAL and YSZ) coating. Two clear interfaces existed between NiAL coating-substrate and ceramic (YSZ)-metallic layers(NiAL). The cyrindrical crystal structures in the ceramic layer were more evident, however, the metallic layers were in close contact with the substrate. 图1c为热处理态(heat-treated)下的EB单层（NiAl）涂层系统，图1c中，涂层系统经过热处理后，涂层与基体之间的界面处存在一个过渡区。Fig 1c showed EB monolayer (NiAl) coating after heat-treatment. There was a transition region between the coating and the substrate after heat treatment.
表1为沉积态（Fig. 1a）和热处理态（Fig. 1c）EB单层涂层系统在不同的区域的成分分布图(elements distribution profiles)。
Table 1 lists the distribution profiles of elements in different areas of as-deposited and heat-treated EB monolayer coating. The Ni contents of as-deposited coating varies from 50.2(单位) in the coating near the surface to 75.4(单位) near the substrate.
而对于热处理态的涂层系统(heat-treated coating sytem)，Ni元素的含量在涂层，界面过渡区和基体的含量分布分别为48.8，56.9和76.5。
Yet, for heat-treated coating, the Ni content in coating, interfacial transition area and substrate are 48.8, 56.9 and 76.5(单位) , respectively.
因此，涂层系统经过热处理后，在涂层与基体的界面处发生了元素扩散(element diffusion)，即在涂层与基体的界面处存在一个元素扩散区域（IDZ）。
Therefore, element diffusion occurs at the interface after heat treatment, suggesting that there is an elements diffusion zone (EDZ) at the interface between the coating and the substrate. |
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