CrON扩散阻挡层对NbCrAl涂层与Nb基高温合金元素互扩散的影响
发布时间:2018-11-28 08:08
【摘要】:利用磁控溅射技术在C103型Nb基高温合金上制备了含和不含CrON扩散阻挡层的NbCrAl涂层,对比研究了2种涂层分别经900℃和1 000℃真空热处理后的元素扩散行为。结果表明:NbCrAl涂层以Cr2Nb和AlNb2相为主,含非晶态组织;真空热处理后生成了NbAl3和(Nb,Cr)沉淀相。热处理温度由900℃升至1 000℃时,NbCrAl涂层中元素扩散速度加快。不含扩散阻挡层样品中Cr和Al元素扩散至基体的含量分别为2.76wt%和1.21wt%,而含扩散阻挡层样品中Cr和Al元素扩散到基体的含量分别仅为2.52wt%和0.84wt%。扩散阻挡层保持连续,且与涂层及基体的界面结合良好,经高温处理后主要以密排六方结构的Cr2O3和Al2O3相为主,有效地抑制了元素互扩散。
[Abstract]:NbCrAl coatings with and without CrON diffusion barrier layers were prepared on C103 Nb based superalloys by magnetron sputtering technique. The diffusion behavior of the two coatings after vacuum heat treatment at 900 鈩,
本文编号:2362305
[Abstract]:NbCrAl coatings with and without CrON diffusion barrier layers were prepared on C103 Nb based superalloys by magnetron sputtering technique. The diffusion behavior of the two coatings after vacuum heat treatment at 900 鈩,
本文编号:2362305
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