Cr,Al颗粒尺寸对Ni-Cr-AI复合镀层氧化行为的影响
SIZE EFFECT OF Cr AND Al PARTICLE ON THE OXIDATION BEHAVIOR OF ELECTRODEPOSITED Ni-Cr-Al COMPOSITE COATINGS
查看参考文献9篇
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文摘
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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J尺寸3Um)复合电沉积制备Ni-IICr-3AI纳米复合镀层(ENC)和Ni-IICr-7AI微米复合镀层(EMC)。纳米颗粒的复合使ENC Ni-IICr-3AI比EMC Ni-IICr-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,ENCNi-IICr-3AI与EMC Ni-IICr-7AI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Cr_20_3膜,进而促进其下Al_20_3膜的快速形成所致。 |
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其他语种文摘
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Two electrodeposited Ni matrix composite coatings were prepared;one was Ni-llCr-3A1 (by mass%)prepared using nano-sized particles of Cr and Al and the other was Ni-llCr-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-llCr-3Al to grow a continuous Cr203 layer first and then an A1203 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-llCr-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. |
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来源
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中国腐蚀与防护学报
,2011,31(3):190-195 【核心库】
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关键词
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电沉积
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Ni-Cr-AI
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纳米复合镀层
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颗粒尺寸效应
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氧化
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地址
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1.
沈阳理工大学应用技术学院, 中国科学院金属腐蚀与防护国家重点实验室, 抚顺, 113122
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沈阳理工大学应用技术学院, 抚顺, 113122
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中国科学院金属研究所, 中国科学院金属腐蚀与防护国家重点实验室, 沈阳, 110016
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1005-4537 |
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学科
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金属学与金属工艺 |
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基金
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中国科学院“百人计划”项目
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文献收藏号
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CSCD:4240485
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