通过高温固相合成方法制备了烧绿石结构Gd2Zr2O7陶瓷材料,研究了其高温相稳定性和热物理性能.采用电子束物理气相沉积方法制备了Gd2Zr2O7-8YSZ(8％ Y2O3-ZrO2)双陶瓷层结构热障涂层,分析了涂层顶层的晶体结构和原子数量比.结果表明,Gd2Zr2O7在室温至1500℃范围内具有良好的相稳定性,比第一代热障涂层8YSZ的高温相稳定区间提高250℃以上.Gd2Zr2O7块材的热膨胀系数在100～1500℃范围内介于8.8×10-6～11.0×10-6 K-1之间,与8YSZ接近;在1000～1400℃高温区间,热导率约为1.0 W(m·K)-1,比8YSZ降低一半左右.沉积制得的Gd2Zr2O7涂层化学成分符合化学计量比,为烧绿石结构,涂层呈现典型的柱状晶结构.
参考文献
| [1] | 郭洪波,宫声凯,徐惠彬,等.电子束物理气相沉积热障涂层研究进展[J].热喷涂技术,2009,1(2):7-13.Guo Hongbo,Gong Shengkai,Xu Huibin,et al.Progress in EB-PVD thermal barrier coatings[J].Thermal Spray Technology,2009,1(2):7-13. |
| [2] | 郭洪波,宫声凯,徐惠彬.先进航空发动机热障涂层技术研究进展[J].中国材料进展,2009,28(9/10):18-26.Guo Hongbo,Gong Shengkai,Xu Huibin.Progress in thermal barrier coatings for advanced aeroengines[J].Materials China,2009,28(9/10):18-26. |
| [3] | Miller R A.Thermal barrier coatings for aircraft engines:History and directions[J].Thermal Spray Technology,1997,6(1):35-42. |
| [4] | 张丹华,王璐,郭洪波,宫声凯.多元稀土氧化物掺杂二氧化锆基陶瓷材料的热物理性能[J].复合材料学报,2011,28(2):179-184.Zhang Danhua,Wang Lu,Guo Hongbo,Gong Shengkai.Thermo-physical properties of multiple rare earth oxide codoped zirconia based ceramic materials[J].Acta Materiae Compositae Sinica,2011,28(2):179-184. |
| [5] | Xie X Y,Guo H B,Gong S K,Xu H B.Lanthanum-titanium-aluminum oxide:A novel thermal barrier coating material for application at 1300 ℃[J].Journal of the European Ceramic Society,2011,31(9):1677-1683. |
| [6] | Guo H B,Wang Y,Wang L,Gong S K.Thermo physical properties and thermal shock resistance of segmented La 2Ce2 O7/YSZ thermal barrier coatings[J].Journal of Thermal Spray Technology,2009,18(4):665-671. |
| [7] | Xu Q,Pan W,Wang J D,et al.Rare earth zirconate ceramics with fluorite structure for thermal barrier coatings[J].Journal of the American Ceramic Society,2006,89 (1):340-342. |
| [8] | Wu J,Wei X,Padture N P,et al.Low thermal conductivity rare earth zirconates for potential thermal barrier coating applications[J].Journal of the American Ceramic Society,2002,85(12):3031-3035. |
| [9] | 刘燕祎,徐强,潘伟,等.固相反应Gd2Zr2O7陶瓷的形成机理研究[J].稀有金属材料与工程,2005,34(增1):584-586.Liu Yanyi,Xu Qiang,Pan Wei,et al.Study of the formation mechanism of Gd2Zr2O7 ceramic by solid state reaction[J].Rare Metal Materials and Engineering,2005,34 (Suppl 1):584-586. |
| [10] | Wuensch B J,Eberman K W,Heremans C,et al.Connection between oxygen ion conductivity of pyrochlore fuel-cell materials and structural change with composition and temperature[J].Solid State Ionics,2000,129(1-4):111-133. |
| [11] | Lian J,Wang L,Chen J,et al.The order-disorder transition in ion irradiated pyrochlore[J].Acta Materialia,2003,51(5):1493-1502. |
| [12] | Wu J,Padture N P,Klemens P G,et al.Thermal conductivity of ceramics in the ZrO2-GdO1.5 system[J].Materials Research Society,2002,17:3193-3200. |
| [13] | Pan W,Wan C L,Xu Q,et al.Thermal diffusivity of samarium-gadolinium zirconate solid solutions[J].Acta Materialia,2007,455 (1/2):16-20. |
| [14] | Wan C L,Pan W,Xu Q,et al.Effect of point defects on the thermal transport properties of (LaxGd1-x)2Zr2O7:Experiment and theoretical model[J].Physical Review B,2006,74(14):144109-1-144109-9. |
| [15] | Wan C L,Qu Z X,Pan W,et al.Influence of B site substituent Ti on the structure and thermo physical properties of A2B2O7-type pyrochlore Gd2Zr2O7[J].Acta Materialia,2009,57(16):4782-4789. |
| [16] | 徐强,刘燕,王敬栋,等.Gd2Zr2O7与Al2O3的高温界面反应[J].稀有金属材料与工程,2005,34(增1):587-589.Xu Qiang,Liu Yah,Wang Jingdong,et al.Study of the high temperature interfacial reaction between Gd2Zr2O7 and Al2O3[J].Rare Metal Materials and Engineering,2005,34 (Suppl1):587-589. |
| [17] | Sehlichting K,Padture N P,Klemens P G.Thermal conductivity of dense and porous yttria stabilized zirconia[J].Journal of Materials Science,2001,36(12):3003-3010. |
| [18] | Govindan K V,Mathews C K,Rao T N,et al.Oxide ion conductivity in some substituted rare-earth pyro-zirconates[J].Journal of Solid State Ionics,1995,80(1/2):99-110. |
| [19] | Evans A G,Hutchinson J W.The mechanics of coating delamination in thermal gradients[J].Surface and Coatings Technology,2007,201(18):7905-7916. |
| [20] | Phillpot S R,McGaughey A J H.Introduction to thermal transport[J].Materials Today,2005,8(6):18-20. |
| [21] | Chen J,Lian J,Pan W,et al.X-ray photoelectron spectroscopy study of disordering in Gd2 (Ti1-x Zrx)2O7 pyrochlores[J].Physical Review Letters,2002,81 (10):105901-1-1059011-4. |
| [22] | Qu Z X,Wan C L,Pan W,et al.Thermo-physical properties of rare earth stannates:Effect of pyrochlore structure[J].Acta Materialia,2012,60(6/7):2948-2949. |
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