无机材料学报2017，Vol.32Issue(9)：973-979,7.DOI:10.15541/jim20160661
镀铝表面改性7YSZ纳米热障涂层热震性能分析
Thermal Shock Analysis of Surface Al-modified 7YSZ Nano-thermal Barrier Coating
摘要
Abstract
In order to improve the thermal shock resistance of 7YSZ nano-thermal barrier coating (TBC), bond coat-ing NiCoCrAlYTa was prepared on simulated turbine blade by HVOF (high velocity oxygen flame). Subsequently, 7YSZ nano-ceramic coating was produced on bond coating as top coating. Al film was deposited on the surface of TBC samples. Then the Al-deposited TBCs were carried out by heat-treatment at different pressures (200, 250, 300 Pa). After that, the thermal shock tests of as-sprayed and Al-modified 7YSZ nano-TBC were taken from 1050℃ toat-mospheric water with holding time of 10 and 5 min, respectively. Micrograph and microstructure evolution of the TBC sample were characterized before and after thermal shock. The results show that a loose top layer with Al nano-grains is formed on the TBC surface due to evaporation and condensation of Al film at vacuum pressure. Besides, with in-crease of heat-treatment pressure, the density of loose layer is increased. A dense Al2O3 layer wasin-situ synthesized under the loose layer due to the reaction of Al and ZrO2. The Al-modified 7YSZ nano-TBCs heat-treated at different pressures has less spallation area than the as-sprayed TBCs after withstood 73 thermal shocks, showing better thermal shock resistance.关键词
热障涂层/7YSZ/热震性能/镀铝改性Key words
thermal barrier coating/7YSZ/thermal cycle/Al-modification分类
化学化工引用本文复制引用
张小锋,周克崧,刘敏,邓春明,邓畅光,陈焕涛..镀铝表面改性7YSZ纳米热障涂层热震性能分析[J].无机材料学报,2017,32(9):973-979,7.基金项目
广东省科学院项目(2017GDASCX-0843) （2017GDASCX-0843）
广东省科技计划项目(201313050800031, 201413050502008, 2014B070706026, 2013B061800053) （201313050800031, 201413050502008, 2014B070706026, 2013B061800053）
广东省自然科学基金团队项目(2016A030312015) Guangdong Academy of Sciences (2017GDASCX-0843) （2016A030312015）
Guangdong Technical Research Program (201313050800031, 201413050502008, 2014B070706026, 2013B061800053) （201313050800031, 201413050502008, 2014B070706026, 2013B061800053）
Guangdong Natural Science Foundation (2016A030312015) （2016A030312015）
