High-temperature Oxidation Behavior and Surface Roughness Evolution of VPS NiCrAlY Coating
High-temperature Oxidation Behavior and Surface Roughness Evolution of VPS NiCrAlY Coating
复制标题
DOI：
10.1007/s11666-007-9150-4
复制
发表时间：
2008-01
影响因子：
3.1
通讯作者：
D. Seo;K. Ogawa;T. Shoji;S. Murata
中科院分区：
文献类型：
--
作者：
D. Seo;K. Ogawa;T. Shoji;S. Murata
本工作以高温环保涂层技术发展为背景，对真空等离子喷涂NiCrAlY涂层的结构转变进行了研究，包括氧化行为、弹性模量、显微硬度和表面粗糙度等。涂层在 1,273 K 的温度下等温氧化不同时间，最长可达 1,000 小时，以形成氧化皮层。结果表明，氧化皮和重量增加与暴露时间成正比。等温暴露后表面粗糙度和硬度下降，但与暴露时间不成正比。在暴露 1 小时的早期，氧化皮生长集中在表面的凹处（表面粗糙度降低），而从较长的角度（时间段）来看，氧化皮生长在凸面表面（表面粗糙度增加）。
In this work, as a background to the development of high temperature environmental protection coating technology, the structural transformation of vacuum-plasma sprayed NiCrAlY coating has been studied, including the oxidation behavior, elastic modulus, microhardness, and surface roughness. Coating was oxidized isothermally at a 1,273 K for different time periods up to 1,000 h in order to form the oxide scale layer. The results showed that the oxide scale and weight gain increased proportional to the exposure time. The surface roughness and hardness decreased after isothermal exposure, but they are not proportional to the exposure time. The oxide scale growth was concentrated in the valleys of the surface at the early 1 h exposure (decreasing surface roughness), whereas the oxide scales over a longer perspective (time period), grew on the convex surface (increasing surface roughness).