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中国腐蚀与防护学报  2011, Vol. 31 Issue (3): 190-195    
  研究报告 本期目录 | 过刊浏览 |
Cr,Al 颗粒尺寸对Ni-Cr-Al复合镀层氧化行为的影响
杨秀英1,2, 赵艳红1, 彭晓2, 王福会2
1. 沈阳理工大学应用技术学院 抚顺 113122
2. 中国科学院金属研究所 金属腐蚀与防护国家重点实验室 沈阳 110016
SIZE EFFECT OF Cr AND Al PARTICLE ON THE OXIDATION BEHAVIOR OF ELECTRODEPOSITED Ni-Cr-Al COMPOSITE COATINGS
YANG Xiuying1,2, ZHAO Yanhong1, PENG Xiao2, WANG Fuhui2
1. Polytechnic School, Shenyang Ligong University, Fushun 113122
2. State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016
全文: PDF(3228 KB)  
摘要: 分别用纳米颗粒Cr (平均尺寸62 nm), Al(平均尺寸85 nm)和微米颗粒Cr 和Al(平均尺寸3 μm)复合电沉积制备Ni-11Cr-3Al纳米复合镀层(ENC)和Ni-11Cr-7Al微米复合镀层(EMC)。纳米颗粒的复合使ENC Ni-11Cr-3Al比EMC Ni-11Cr-7Al的颗粒分布更加均匀,颗粒间距减小近25倍。900℃, 24 h恒温氧化实验表明,ENC Ni-11Cr-3Al与EMC Ni-11Cr-7Al相比氧化速率显著降低。这是由于其快速形成一层连续、致密的Cr2O3膜,进而促进其下Al2O3膜的快速形成所致。
关键词 电沉积Ni-Cr-Al纳米复合镀层颗粒尺寸效应氧化    
Abstract:Two electrodeposited Ni matrix composite coatings were prepared; one was Ni-11Cr-3Al (by mass%) prepared using nano-sized particles of Cr and Al and the other was Ni-11Cr-7Al composite prepared using micron-sized particles of Cr and Al. Compared with the electrodeposited micron-composite (EMC) Ni-11Cr-7Al, the electrodeposited nanocomposite (ENC) Ni-11Cr-3Al exhibited much homogeneous distribution of Cr and Al particles, because of an approximately 25-fold decrease in interparticle spacing. The significantly shorter interparticle spacing allowed the ENC Ni-11Cr-3Al to grow a continuous Cr2O3 layer first and then an Al2O3 layer underneath during a very short stage of oxidation. This is the fundamental reason for the result that the ENC, although it had a lower content of Al, was oxidized slower than the EMC Ni-11Cr-7Al during oxidation in air at 900℃. The size effect of the Cr and Al particles on the oxidation behavior of the electrodeposited Ni-Cr-Al composite coatings is discussed in detail.
Key wordsElectrodeposition    Ni-Cr-Al    nanocomposite    particle size effect    oxidation
收稿日期: 2010-11-15     
ZTFLH: 

TG172.32

 
基金资助:

中国科学院百人计划项目资助

通讯作者: 杨秀英     E-mail: xyyang0821@163.com
Corresponding author: YANG Xiuying     E-mail: xyyang0821@163.com
作者简介: 杨秀英,女,1970年生,博士,教授,研究方向为纳米材料的高温腐蚀性能

引用本文:

杨秀英, 赵艳红, 彭晓, 王福会. Cr,Al 颗粒尺寸对Ni-Cr-Al复合镀层氧化行为的影响[J]. 中国腐蚀与防护学报, 2011, 31(3): 190-195.
YANG Xiu-Yang. SIZE EFFECT OF Cr AND Al PARTICLE ON THE OXIDATION BEHAVIOR OF ELECTRODEPOSITED Ni-Cr-Al COMPOSITE COATINGS. J Chin Soc Corr Pro, 2011, 31(3): 190-195.

链接本文:

https://www.jcscp.org/CN/      或      https://www.jcscp.org/CN/Y2011/V31/I3/190

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