Nanoindentation and residual stress measurements of yttria-stablized zirconia composite coatings produced by electrophoretic deposition
Nanoindentation and residual stress measurements of yttria-stablized zirconia composite coatings produced by electrophoretic deposition
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DOI：
10.1016/j.tsf.2005.08.327
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发表时间：
2006-01-03
期刊：
影响因子：
2.1
通讯作者：
Xiao, P
中科院分区：
文献类型：
--
作者：
Lu, X;Wang, X;Xiao, P
采用电泳沉积（EPD）法制备了氧化钇稳定的氧化锆（YSZ）/Al 2 O3复合涂层。涂层的机械性能由纳米压痕和残余应力由Cr 3+荧光光谱测定。有人发现，纳米压痕是敏感的亚微米孔的存在。为了确定宏观机械性能，由于材料的多孔性和不均匀性，需要>1000 nm的穿透深度。微观应力和力学性能都表现出梯度的涂层厚度，这可以归因于密度梯度所造成的约束烧结的涂层。已经证实，由纳米压痕确定的机械性能不受外部施加的应力的影响。AFM检查证实压痕过程中没有压痕堆积。(c)2005 Elsevier B. V.保留所有权利。
Yttria stabilized zirconia (YSZ)/Al2O3 Composite coatings were prepared by an electrophoretic deposition (EPD) method. The mechanical properties of the coatings were determined by nanoindentation and residual stresses were measured by Cr3+ fluorescence spectroscopy. It was found that the nanoindentation was sensitive to the presence of sub-micrometer pores. In order to determine the macroscopic mechanical properties, a penetration depth of >1000 run was required due to the porous and inhomogeneous nature of the materials. Both microstress and mechanical properties exhibited a gradient across the coating thickness, which can be attributed to the density gradient caused by constrained sintering of the coatings. It has been confirmed that the mechanical properties determined by nanoindentation are not affected by the external applied stress. AFM examination confirmed there was no impression pile-up during indentation. (c) 2005 Elsevier B.V. All rights reserved.