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

doi:10.7527/S1000-6893.2015.0043

材料工程与机械制造

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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

许安, 周敏, 杨阳, 秦泽华, 李伟洲

广西大学材料科学与工程学院, 南宁 530004

收稿日期:2014-10-27 修回日期:2015-02-06 出版日期:2015-11-15 发布日期:2015-02-11
通讯作者: 李伟洲,Tel.:0771-3270152,E-mail:liwz2008@hotmail.com E-mail:liwz2008@hotmail.com
作者简介:许安,男,硕士研究生。主要研究方向:材料表面处理与防护。E-mail:xuangx123@163.com;李伟洲,男,博士,研究员,博士生导师。主要研究方向:材料表面处理与防护。Tel:0771-3270152,E-mail:liwz2008@hotmail.com
基金资助:
国家自然科学基金(51371059,51361003,51001032);广西自然科学基金(2014GXNSFCA118013,0731013);广西高等学校高水平创新团队项目(第二批);广西自然科学基金创新研究团队项目(2011GXNSFF018001)

Influence of CrON diffusion barrier on elements inter-diffusion between NbCrAl coating and Nb-based superalloy

XU An, ZHOU Min, YANG Yang, QIN Zehua, LI Weizhou

School of Materials Science and Engineering, Guangxi University, Nanning 530004, China

Received:2014-10-27 Revised:2015-02-06 Online:2015-11-15 Published:2015-02-11
Supported by:
National Natural Science Foundation of China (51371059,51361003,51001032);Guangxi National Natural Science Foundation (2014GXNSFCA118013,0731013);High Level Innovation Teams from Universities of Guangxi (the Second Batch);Guangxi National Natural Science Fund for Innovative Research Team (2011GXNSFF018001)

摘要/Abstract

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1000℃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1000℃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。

关键词: 磁控溅射技术, 涂层, Nb基合金, 扩散阻挡层, 互扩散

Abstract:

NbCrAl coatings with and without CrON diffusion barrier (DB) are prepared on C103 Nb-based superalloy by magnetron sputtering technique. The element diffusion behavior of two kinds of the coatings during vacuum heat treatment at 900℃ and 1000℃ is investigated. The results indicate that the as-deposited NbCrAl coating is composed of Cr₂Nb and AlNb₂ with amorphous phases. After vacuum heat treatment, NbAl₃ and (Nb,Cr) precipitated phases are formed. When the heat treatment temperature is increased to 1000℃ from 900℃, the rate of diffusion of elements in the NbCrAl coating becomes accelerated. Cr and Al elements in the samples without a DB diffuse to C103 substrate are 2.76wt% and 1.21wt%, while in the samples with a DB are only 2.52wt% and 0.84wt%. CrON diffusion barrier maintains continuous and has good adhesion to the coating and substrate as well. During high-temperature treatment, the CrON diffusion barrier, which is mainly composed of Cr₂O₃ and Al₂O₃ phases with close-packed hexagonal structure phases, effectively suppresses the elements inter-diffusion between the coating and substrate.

Key words: magnetron sputtering, coating, Nb-based superalloy, diffusion barrier, inter-diffusion

中图分类号:

许安, 周敏, 杨阳, 秦泽华, 李伟洲. 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[J]. 航空学报, 2015, 36(11): 3734-3741.

XU An, ZHOU Min, YANG Yang, QIN Zehua, LI Weizhou. Influence of CrON diffusion barrier on elements inter-diffusion between NbCrAl coating and Nb-based superalloy[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2015, 36(11): 3734-3741.

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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

Influence of CrON diffusion barrier on elements inter-diffusion between NbCrAl coating and Nb-based superalloy

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