航空学报 > 2011, Vol. 32 Issue (4): 758-764   doi: CNKI:11-1929/V.20101110.1442.001

Ru过渡层对NiCoCrAlY涂层与DD6单晶高温合金界面扩散行为的影响

王娟1, 彭徽1, 陈国忠2, 郭洪波1, 宫声凯1   

  1. 1. 北京航空航天大学 材料科学与工程学院, 北京 100191;
    2. 中航工业沈阳黎明航空发动机(集团)有限责任公司, 辽宁 沈阳 110043
  • 收稿日期:2010-07-24 修回日期:2010-08-25 出版日期:2011-04-25 发布日期:2011-04-25
  • 通讯作者: Tel.: 010-82317117 E-mail: guo.hongbo@buaa.edu.cn E-mail:guo.hongbo@buaa.edu.cn
  • 作者简介:王娟(1986- ) 女,硕士。主要研究方向:高温防护涂层。 Tel: 010-82317117 E-mail: wwjj0209@163.com郭洪波(1971- ) 男,博士,副教授,博士生导师。主要研究方向:高温防护涂层。 Tel: 010-82317117 E-mail: guo.hongbo@buaa.edu.cn
  • 基金资助:

    国家自然科学基金(50771059,50731001); 国家"973"计划(2010CB631200); 高等学校博士学科点专项科研基金(20070006017)

Impact of Ru Buffer Layer on Diffusion Behavior Between NiCoCrAlY and Single Crystal Superalloy DD6

WANG Juan1, PENG Hui1, CHEN Guozhong2, GUO Hongbo1, GONG Shengkai1   

  1. 1. School of Materials Science and Engineering, Beihang University, Beijing 100191, China;
    2. AVIC Shenyang Liming Aero-engine(Group)Corporation Ltd., Shenyang 110043, China
  • Received:2010-07-24 Revised:2010-08-25 Online:2011-04-25 Published:2011-04-25

摘要: 针对第二代单晶高温合金DD6开展了一种具有阻扩散功能的金属防护涂层的探索性研究。采用电镀和电子束物理气相沉积(EB-PVD)方法在DD6单晶高温合金上制备了NiCoCrAlY/Ru双层结构涂层,同时采用EB-PVD在单晶合金上沉积了单层NiCoCrAlY涂层。研究结果表明,在1 050 ℃大气环境中扩散处理300 h后,涂覆单一NiCoCrAlY涂层的单晶高温合金基体中析出了厚度约为55 μm的互扩散区(IDZ)以及厚度达25 μm的二次反应区(SRZ)。与单一的NiCoCrAlY涂层相比,NiCoCrAlY/Ru涂覆的合金基体中只有少量的拓扑密堆相(TCP)析出。NiCoCrAlY/Ru双层结构涂层减缓了涂层中的Al元素的内扩散,有效地抑制了基体SRZ的形成。

关键词: 电子束物理气相沉积, 单晶高温合金, 涂层, 二次反应区, 拓扑密堆相, 互扩散

Abstract: In this paper, a metallic protective coating is investigated as a diffusion barrier on the second generation single crystal superalloy DD6. A double layer of NiCoCrAlY/Ru coating is prepared by electroplating and electron beam physical vapor deposition (EB-PVD) on a sample of single crystal superalloy DD6. Also, a single NiCoCrAlY coating is deposited onto the single crystal superalloy by EB-PVD. The results show that an interdiffusion zone (IDZ) of ~55 μm and a secondary reaction zone (SRZ) of ~25 μm are formed in the superalloy after 300 h heat-treatment at 1 050 ℃ in atmospheric environment. Compared with the single NiCoCrAlY coating, the NiCoCrAlY/Ru coating effectively suppressed the formation of SRZ in the superalloy. There are only tiny amounts of topologically close-packed phases (TCP) precipitated in the superalloy.

Key words: electron beam physical vapor deposition, single crystal superalloy, coating, secondary reaction zone, topologically close-packed phase, interdiffusion

中图分类号: