通过低压等离子喷涂技术在Ni基合金表面制备了Y2O3-CeO2-TZP/NiCoCrAlY梯度热障 涂层，采用光学显微镜、X射线衍射仪、扫描电镜、电子探针等方法研究了稀土硅铁对Y2O 3-CeO2-TZP/NiCoCrAlY梯度热障涂层的组织和性能的影响.结果表明，在涂层中加入适 量的稀土硅铁，能改善涂层的组织结构，提高其抗热震性能和抗高温氧化性能.
Y2O3-CeO2-TZP/NiCoCrAlY graded coating h as been developed on Ni-base superalloy substrate by low-pressure plasma sprayin g with single torch,and the microstructure,mechanical properties and microstruct ure stability,as well as thermal shock properties and its failure mechanism were investigated by means of optical microscopy,X-ray diffractometer,scanning elect ron microscopy,electron probe microanalyser,and so on.The microscopic structure and the oxidation resistant property as well as the anti-thermal shock property were improved after an amount of lanthanum bearing ferrosilicon was added in the metal constituent.
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