NiCrAlYSi涂层/DD6单晶高温合金界面再结晶和互扩散行为

doi:CNKI:11-1929/V_20101028.1820.001

材料工程与机械制造

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NiCrAlYSi涂层/DD6单晶高温合金界面再结晶和互扩散行为

姚锐, 郭洪波, 彭徽, 宫声凯

北京航空航天大学材料科学与工程学院, 北京 100191

收稿日期:2010-07-26 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:姚锐(1986－ ) 女,硕士。主要研究方向:高温防护涂层。 E-mail: ashely.ruiyao@gmail.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)

Recrystallization and Inter-diffusion Behaviors of NiCrAlYSi Coating/DD6 Single Crystal Superalloy System

YAO Rui, GUO Hongbo, PENG Hui, GONG Shengkai

School of Materials Science and Engineering, Beihang University, Beijing 100191, China

Received:2010-07-26 Revised:2010-08-25 Online:2011-04-25 Published:2011-04-25

摘要/Abstract

摘要： 采用电子束物理气相沉积(EB-PVD)在单晶高温合金DD6基体上沉积NiCrAlYSi涂层。利用X射线衍射(XRD)、扫描电镜(SEM)、能谱仪(EDS)以及透射电镜(TEM)等研究了高温扩散过程中NiCrAlYSi/DD6的界面再结晶和互扩散行为。研究结果表明合金表面喷砂处理后的涂层试样经1 323 K真空热处理4 h后,在涂层/合金基体界面出现了厚度约为7 μm的胞状再结晶区;表面未喷砂处理的涂层试样经过50 h后没有出现再结晶,经过75 h后形成了厚度约为15 μm的再结晶区。在大气中静态氧化500 h后,表面未喷砂处理试样在涂层/合金界面形成了厚度约为28 μm的再结晶区,同时在合金基体中形成了厚度约60 μm、以针状拓扑密堆相(TCP)为主的二次反应区(SRZ),TCP中富含W、Re和Ta元素。

关键词: 单晶高温合金, 涂层, 互扩散, 再结晶, 二次反应区

Abstract: In this paper, the NiCrAlYSi coatings are deposited by electron beam physical vapor deposition (EB-PVD) on nickel-based single crystal superalloy DD6. Inter-diffusion and recrystallization behaviors at the coating/superalloy interface of the coated superalloy substrates are investigated at 1 323 K by X-ray diffraction (XRD), scanning electron microscopy (SEM) equipped with energy dispersive spectrometry (EDS) and transmission electron microscopy (TEM). The results indicate that a recrystallization zone of ~7 μm thickness is formed at the coating/substrate interface of the blasted sample after 4 h vacuum heat-treatment at 1 323 K. Such recrystallization zone is not observed in the unblasted sample even after 50 h heat-treatment. However, a recrystallization zone of ~15 μm thickness is formed in the sample after 75 h. After 500 h isothermal oxidation in air at 1 323 K, a recrystallization zone of ~28 μm thickness is formed in the unblasted sample. Besides, a so-called secondary reaction zone of ~60 μm, basically consisting of topologically close-packed phase (TCP) needles, is formed in the superalloy. The precipitate of TCP is enriched in W, Re and Ta.

Key words: single crystal superalloy, coating, inter-diffusion, recrystallization, secondary reaction zone

中图分类号:

姚锐, 郭洪波, 彭徽, 宫声凯. NiCrAlYSi涂层/DD6单晶高温合金界面再结晶和互扩散行为[J]. 航空学报, 2011, 32(4): 751-757.

YAO Rui, GUO Hongbo, PENG Hui, GONG Shengkai. Recrystallization and Inter-diffusion Behaviors of NiCrAlYSi Coating/DD6 Single Crystal Superalloy System[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2011, 32(4): 751-757.

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E-mail：hkxb@buaa.edu.cn

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NiCrAlYSi涂层/DD6单晶高温合金界面再结晶和互扩散行为

Recrystallization and Inter-diffusion Behaviors of NiCrAlYSi Coating/DD6 Single Crystal Superalloy System

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