Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

您目前所在的位置:首页 - 期刊简介 - 详细页面

中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第23卷    第4期    总第169期    2013年4月

[PDF全文下载]        

    

文章编号:1004-0609(2013)04-0977-10
电弧离子镀NiCrAlY涂层对镍基单晶合金热腐蚀行为的影响
卢旭东1,田素贵2,王  涛1,朱德刚1

(1. 沈阳理工大学 装备工程学院,沈阳 110159;
2. 沈阳工业大学 材料科学与工程学院,沈阳 110870
)

摘 要: 采用电弧离子镀技术在镍基单晶合金表面沉积Ni28Cr11Al0.5Y涂层,研究镍基单晶合金及其Ni28Cr11Al0.5Y涂层在900 ℃的75%Na2SO4+25% K2SO4(质量分数)熔盐中的热腐蚀行为。结果表明:镍基单晶合金受到了严重的热腐蚀,镍基单晶合金内部出现了严重的内硫化和内氧化现象,且内硫化物区域和内氧化物区域出现明显分层结构,与外腐蚀层相邻的区域为内氧化区域,远离外腐蚀层的基体内部形成内硫化区域;而Ni28Cr11Al0.5Y涂层在热腐蚀过程中,表面生成连续的Al2O3氧化膜,且随腐蚀时间延长,Al2O3氧化膜的厚度增大,表现出优良的抗热腐蚀性能。

 

关键字: 镍基单晶合金;电弧离子镀;熔盐;热腐蚀;内氧化;内硫化

    Influence of NiCrAlY coatings by arc ion plating on hot corrosion behaviour of single crystal nickel-based superalloy
LU Xu-dong1, TIAN Su-gui2, WANG Tao1, ZHU De-gang1

1. Equipment Engineering College, Shenyang Ligong University, Shenyang 110159, China;
2. School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, China

Abstract:Ni28Cr11Al0.5Y coatings were deposited on a single crystal Ni-base superalloy substrate by arc ion plating. The corrosion behaviors of the superalloy and Ni28Cr11Al0.5Y coatings in molten 75%Na2SO4+25% K2SO4 (mass fraction) at 900 ℃ were studied. The results indicate that the superalloy suffer catastrophic hot corrosion, and serious internal oxidation and internal sulfidation occur in a single crystal Ni-base superalloy. The regions near the layer of the surface are identified as the internal oxidizing zones, and the matrix region far from the layer of the surface is identified as the internal sulfidation zone. During the hot corrosion of Ni28Cr11Al0.5Y, the continuous Al2O3 oxidation film forms, and with the hot corrosion time increasing, the oxidation film becomes thick and has better hot corrosion resistance property.

 

Key words: single crystal Ni-base superalloy; arc ion plating; molten sulfate; hot corrosion; internal oxidation; internal sulfidation

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

主管:中国科学技术协会 主办:中国有色金属学会 承办:中南大学
湘ICP备09001153号 版权所有:《中国有色金属学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市岳麓山中南大学内 邮编:410083
电 话:0731-88876765,88877197,88830410   传真:0731-88877197   电子邮箱:f_ysxb@163.com