Characterization of glass–alumina functionally graded coatings obtained by plasma spraying
Characterization of glass–alumina functionally graded coatings obtained by plasma spraying
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DOI：
10.1016/j.jeurceramsoc.2006.05.105
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发表时间：
2007
影响因子：
5.7
通讯作者：
V. Cannillo;L. Lusvarghi;C. Siligardi;A. Sola
中科院分区：
文献类型：
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作者：
V. Cannillo;L. Lusvarghi;C. Siligardi;A. Sola
采用等离子喷涂技术制备了玻璃-氧化铝功能梯度涂层（FGC），这是一种用于制备厚涂层（>10-20μm）的沉积技术，可确保高柔性和良好的可靠性。通过在氧化铝基材上构建梯度玻璃-氧化铝涂层获得样品;涂层被设计为多层系统，每层的平均组成与相邻层略有不同。考虑了两种不同的组成梯度（从100体积%氧化铝至100体积%玻璃和80- 20体积%玻璃至100体积%玻璃），并进行几次热处理，以改善基材-涂层界面并诱导玻璃相的受控转变（烧结和/或结晶）。经过初步筛选的喷涂和热处理的样品，最感兴趣的仔细表征，特别是从机械的角度来看。事实上，测试，如维氏显微压痕允许欣赏的梯度组成分布和热处理引起的后果的影响。
Glass–alumina functionally graded coatings (FGCs) were produced via plasma spraying, a deposition technique for thick (>10–20μm) coatings production, which ensures high flexibility and good reliability. The samples were obtained by building a graded glass–alumina coating onto an alumina substrate; the coatings were designed as multi-layered systems, each layer having a mean composition slightly different from the neighbouring ones. Two different compositional gradients were considered (from 100vol.% alumina to 100vol.% glass and from 80–20vol.% glass to 100vol.% glass) and several heat treatments were performed in order to improve the substrate-coating interface and induce a controlled transformation (sintering and/or crystallization) of the glassy phase. After a preliminary screening of the as-sprayed and the heat treated samples, the most interesting ones were carefully characterized, especially from a mechanical point of view. In fact, tests such as Vickers micro-indentation allowed to appreciate the effects of the graded compositional profile and the consequences induced by thermal treatments.