| Pd-Ni-Al涂层的高温短期氧化行为 |
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| 引用本文： | 李猛进,孙晓峰,管恒荣,姜晓霞,胡壮麒. Pd-Ni-Al涂层的高温短期氧化行为[J]. 腐蚀科学与防护技术, 2003, 15(2): 67-71 |
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| 作者姓名： | 李猛进 孙晓峰 管恒荣 姜晓霞 胡壮麒 |
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| 作者单位： | 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;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;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;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;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 |
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| 摘 要： | 在M38镍基高温合金上电镀Pd-20 mass%Ni合金，采用低压固体粉末包埋渗铝方法制备钯改性铝化物涂层，XRD分析表明，涂层主要由β-(Ni,Pd)Al相组成.利用TGA、SEM等方法，研究了涂层在800℃、900℃和1100℃的高温氧化行为表明，β-(Ni,Pd)Al涂层恒温氧化动力学遵循抛物线规律；1000℃氧化动力学则不遵循抛物线规律.在800℃和900℃下，β-(Ni,Pd)Al涂层表面氧化产物包括α-Al2O3、θ-Al2O3和少量的γ-Al2O3；在1000℃下，涂层表面存在α-Al2O3和θ-Al2O3两种氧化物；在1100℃下，涂层表面氧化产物主要是α-Al2O3.此外，在各温度下涂层表面的氧化产物中都含有少量的TiO2，随着温度升高，其含量增加.
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| 关 键 词： | Pd-Ni-Al涂层 高温氧化 氧化动力学θ-Al2O3 |
| 文章编号： | 1002-6495(2003)02-0067-05 |
| 修稿时间： | 2002-09-09 |
HIGH TEMPERATURE OXIDATION BEHAVIOR OF (Ni,Pd)Al COATING |
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| LI Mengjin,SUN Xiaofeng,GUAN Hengrong,JIANG Xiaoxia,Hu ZhuangqiState Key Laboratory for Corrosion and Protection. HIGH TEMPERATURE OXIDATION BEHAVIOR OF (Ni,Pd)Al COATING[J]. Corrosion Science and Protection Technology, 2003, 15(2): 67-71 |
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| Authors: | LI Mengjin SUN Xiaofeng GUAN Hengrong JIANG Xiaoxia Hu ZhuangqiState Key Laboratory for Corrosion Protection |
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| Affiliation: | LI Mengjin,SUN Xiaofeng,GUAN Hengrong,JIANG Xiaoxia,Hu ZhuangqiState Key Laboratory for Corrosion and Protection,Institute of Metal Research,The Chinese Academy of Sciences,Shenyang 110016 |
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| Abstract: | (Ni,Pd)Al coating prepared by low pressure pack cementation on nickel-based superalloy M38 predeposited with Pd-20mass% Ni alloy,iscomposed of β-(Ni,Pd)Al phase.The isothermal oxidation behavior of the coating at 800℃-1100℃ was investigated by TGA、SEM.It was found that the oxidation kinetics accorded preferably with parabolic law at 800℃,900℃ and 1100℃,but not at 1000℃.θ-Al2O3 and α-Al2O3 were the main oxidation product and γ-Al2O3 was very little at 800℃ and 900℃,θ-Al2O3 and α-Al2O3 at 1000℃,and only α-Al2O3 at 1100℃.In addition,there was a little TiO2 on the coating surface,and the content of TiO2 was increasing with rising of the temperature. |
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| Keywords: | Pd-Ni-Al coating high temperature oxidation oxidation kinetics θ-Al2O3 |
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