Re对NiCrAlY涂层热腐蚀行为的影响

中国腐蚀与防护学报

2010, Vol. 30

Issue (2): 150-154

会议论文

本期目录 | 过刊浏览

Re对NiCrAlY涂层热腐蚀行为的影响

韦华;黄粮;梁静静;孙晓峰;管恒荣;胡壮麒

中国科学院金属研究所高温合金研究部沈阳110016

EFFECT OF Re ON THE HOT-CORROSION BEHAVIOR OF A NiCrAlY OVERLAY COATING

WEI Hua; HUANG Liang; LIANG Jingjing; SUN Xiaofeng; GUAN Hengrong; HU Zhuangqi

Superalloy Division;Institute of Metal Research; Chinese Academy of Sciences;Shenyang 110016

全文: PDF(2073 KB)

摘要:

通过电弧离子镀制备了NiCrAlYRe和NiCrAlY涂层，经真空热处理后涂层均由γ´-Ni₃Al、γ-Ni、 β-NiAl和α-Cr四相构成。在NiCrAlYRe涂层中，Re主要存在于α-Cr相，Re促进了α-Cr相在涂层中的析出，并提高了α-Cr在长期氧化过程中的稳定性，特别在氧化膜/涂层界面上析出了大量富Re的α-Cr。由于富Re的α-Cr 同α-Al₂O₃具有极为接近的热膨胀系数，降低了氧化膜中的热应力，提高了NiCrAlY 涂层表面抗剥落能力。添加Re明显提高了NiCrAlY涂层在900℃90%Na₂SO₄+ 10%K₂SO₄介质中的抗热腐蚀性能。

关键词 ： NiCrAlY, 热腐蚀, 电弧离子镀(AIP)

Abstract：

Arc ion plating (AIP) was used to produce NiCrAlY and NiCrAlYRe overlay coatings. After heat treatment in vacuum, both of the coatings consisted of γ‘-Ni₃Al, γ-Ni, β-NiAl and α-Cr. Re in the NiCrAlYRe coating existed in α-Cr and promoted the precipitation and thermal stability of α-Cr. The existence of α-Cr in the interface of coating and substrate lowered coefficient of thermal expansion and thus reduced thermal stress in the surface scale, improving adherence of the scale. The addition of Re obviously increased hot corrosion resistance of NiCrAlY in 90%Na₂SO₄+10 mass%K₂SO₄.

Key words： NiCrAlY hot corrosion AIP

收稿日期: 2009-11-02

ZTFLH:

TG174

通讯作者: 韦华 E-mail: hwei@imr.ac.cn

Corresponding author: WEI Hua E-mail: hwei@imr.ac.cn

作者简介: 韦华, 男，1974年生，博士生，研究员，研究方向为高温防护涂层的性能

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引用本文:

韦华;黄粮;梁静静;孙晓峰;管恒荣;胡壮麒. Re对NiCrAlY涂层热腐蚀行为的影响[J]. 中国腐蚀与防护学报, 2010, 30(2): 150-154.
WEI Hua, HUANG Liang, LIANG Jing-Jing, XUN Xiao-Feng, GUAN Heng-Rong, HU Zhuang-Qi. EFFECT OF Re ON THE HOT-CORROSION BEHAVIOR OF A NiCrAlY OVERLAY COATING. J Chin Soc Corr Pro, 2010, 30(2): 150-154.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2010/V30/I2/150

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