铝合金上等离子喷涂NiCrAlCoY/ZrO_2梯度热障层连接的研究

The Binding of Graded NiCrAlCoY/ZrO_2 Thermal Barrier Coatings by Plasma Spraying on Aluminum Pistons

利用等离子喷涂法在发动机铝合金活塞上制得 Ni Cr Al Co Y与用质量分数为 8%的 Y2 O3 稳定的 Zr O2 梯度热障层。经热震实验、金相分析、SEM分析和 TEM分析 ,结果表明该热障层具有良好的抗热冲击性和高温热稳定性 ,并且 Ni Cr Al Co Y与 Zr O2 间形成了化学键结合。

Graded NiCrAlCoY/ZrO 2 thermal barrier coatings (TBCs) stabilized by 8% Y 2O 3 are prepared by plasma spraying on aluminum pistons. Thermal vibration experiment, metallographic microscope analysis, SEM and TEM analyses show that the graded TBCs have a good resistance to thermal shock and a good thermal stability with chemical bonds formed between NiCrAlCoY and ZrO 2. The result provides a new way to ensure the reliability of graded TBCs.