摘要
采用有限元法计算了涂层结构、材料成分等对等离子喷涂Sm2Zr2O7/NiCoCrAlY功能梯度热障涂层热冲击性能的影响。结果表明:径向热应力在试样边沿急剧降低,而轴向热应力在边沿处发生从压应力向拉应力的突变;从基体至涂层表面,涂层中的径向冲击热应力逐渐增大,增加涂层层数可缓解热应力;材料组成对涂层的冲击热应力影响不明显。所研究的1357功能梯度热障涂层具有最好的抗热冲击性能。
The effect of coating structure,material composition on thermal shocking property of plasma sprayed Sm2Zr2O7/NiCoCrAlY functional graded thermal barrier coatings were researched by finite element method.Results show that radial thermal shocking stresses decrease suddenly and axial thermal shocking stresses transform from compressive-stress to that of pulling-stress at the edge of sample;Radial thermal-shocking stresses increase gradually from bottom to surface of the coating,and they decrease gradually with increasing of coating layers;Material compositions have almost no effect on thermal-shocking property,the 1357 coating has the most excellent thermal-resistance.
出处
《表面技术》
EI
CAS
CSCD
北大核心
2012年第2期86-89,共4页
Surface Technology
关键词
稀土锆酸盐
热障涂层
有限元法
热应力
rare earth zirconate
thermal barrier coatings
finite element method
thermal stress
作者简介
陈晓鸽（1983-），女，河南濮阳人，助教，主要研究方向为陶瓷材料热物理性能。
