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采用大气等离子喷涂分别以抛光的316L不锈钢和抛光的Ni Co Cr Al YTa涂层为基体依次进行7%氧化钇稳定氧化锆(7%Y2O3-Zr O2,7YSZ)粒子收集。首先研究了不同基体温度对7YSZ粒子铺展形貌的影响,其次原位观察不同基体与铺展粒子的结合形貌,使用了聚焦离子束focused ion beam进行切割;最后为进一步解释沉积粒子与不同基体的界面结合情况,采用了有限元软件ANSYS/LS-DYNA对7YSZ粒子沉积过程进行模拟。结果表明:不同类型基体的基体温度控制在250℃左右时均能获得圆盘状扁平7YSZ粒子。圆盘粒子在316L基体上铺展时边沿区域有翘曲现象,而中心区域则与基体结合紧密;圆盘粒子在Ni Co Cr Al YTa涂层基体上铺展时边沿没有翘曲现象,整个扁平粒子与基体结合紧密。另外,7YSZ粒子在2种基体上的铺展形貌ANSYS模拟结果与实际粒子沉积形貌一致。
Abstract：7%Y2O3-Zr O2(7YSZ, i.e. 7%yttria stabilized zirconia) flattening splats were collected on the polished 316 L stainless steel and the polished Ni Co Cr Al YTa coated by air plasma spraying as substrates, respectively. The influence of substrate temperature on the splat morphology was investigated. The interface between 7YSZ splat and the substrate was characterized via field emission-scanning electron microscopy assisted with focused ion beam(FIB). Besides, the interface between the splat and the substrate was also analyzed by an finite element software named ANSYS/LS-DYNA. The results indicate that the disk-shaped splats are obtained on different substrates at nearly 250 ℃. The warping appears at the edge of flattening splat on the 316 L substrate. However, little warping occurs at the edge interface of coated 7YSZ/Ni Co Cr Al YTa. The center interface between 7YSZ and substrate can be well-bonded. In addition, the splat morphology simulated by ANSYS on both substrates is similar to the experimental result.
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基本信息:
DOI：10.14062/j.issn.0454-5648.2015.01.04
中图分类号:TQ153
引用信息:
[1]张小锋,周克崧,宋进兵,等.大气等离子喷涂7%氧化钇稳定氧化锆粒子沉积形貌分析[J],2015,43(01):21-27.DOI:10.14062/j.issn.0454-5648.2015.01.04.
基金信息:
国家“973计划”项目(2012CB625100);; 国家“863计划”项目(2012AA03A512)