CeO2/ZrO2-Y2O3纳米结构热障涂层的制备与高温性能
收稿日期: 2009-11-09
修回日期: 2010-03-11
网络出版日期: 2010-07-19
基金资助
吉林省自然科学基金(20080507); 总装备部武器预研基金(51461020201JW1301)
Preparation and High-temperature Properties of Nanostructured CeO2/ZrO2-Y2O3 Thermal Barrier Coating
Received date: 2009-11-09
Revised date: 2010-03-11
Online published: 2010-07-19
将纳米ZrO2-8wt%Y2O3和纳米ZrO2-8wt%Y2O3中掺杂25wt%纳米CeO2(CeO2/ZrO2-8wt%Y2O3)的两种粉末进行团聚处理, 用等离子喷涂方法在GH30高温合金表面分别制备了两种材料热障涂层.用扫描电镜、透射电镜和X射线衍射仪对掺杂了25wt％纳米CeO2的团聚体粉末和涂层的微观组织结构进行分析研究, 测试比较了两种涂层在900、1100和1300℃时的热震性能, 并试验了两种涂层在1050℃、保温100h后的抗氧化能力.结果表明, 纳米粉末经团聚处理后为多孔的球形结构, 掺杂纳米CeO2涂层组成相为稳定的t相(t-ZrO2、t-Zr0.82Y0.18O1.91、t-Zr0.82Ce0.18O2)和c相(c-CeO2), 并保持纳米组织结构, 平均晶粒尺寸为45nm, 其抗热震性能和氧化性能要高于纳米ZrO2-8wt%Y2O3涂层.
宫文彪, 李于朋, 刘 威, 孙大千, 王文权 . CeO2/ZrO2-Y2O3纳米结构热障涂层的制备与高温性能[J]. 无机材料学报, 2010 , 25(8) : 860 -864 . DOI: 10.3724/SP.J.1077.2010.00860
The nanosized ZrO2-8wt%Y2O3 (YSZ) and CeO2/ZrO2-8wt%Y2O3(CYZ) particles were agglomerated as powder feedstocks. Thermal barrier coatings were prepared on the GH30 high temperature alloy surface by atmospheric plasma spray. The microstructures of the agglomerated powders doped with 25wt% CeO2 particles and the coating were characterized using scanning electron microscope (SEM), transmission electron microscope (TEM) and X-ray diffraction (XRD) technology. The thermal shocks resistance of the ZrO2-8wt%Y2O3 (YSZ) and CeO2/ZrO2-8wt%Y2O3 (CYZ) coatings were tested at 900℃,1100℃ and 1300℃. The oxidation resistance testing of coatings were tested at 1050℃ for 100h. The results show that the nano-powder by agglomerated treatment is porous spherical. The phase compositons of the nano-CYZ coating are relatively stable t phase (t-ZrO2, t-Zr0.82Y0.18O1.91, t-Zr0.82Ce0.18O2) and c phase (c-CeO2). The average grain size of the CYZ coating is about 45nm. The nanostructured CeO2/ZrO2-Y2O3 coating exhibit higher thermal-shock and oxidation resistances than those of the nano-YSZ coating.
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