| High temperature performance of arc-sprayed aluminum bronze coatings for steel |
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| 作者单位： | School of Materials Science and Engineering Shenyang University of Technology Shenyang 110023 China，School of Materials Science and Engineering Shenyang University of Technology Shenyang 110023 China，State Key Laboratory for Corrosion and Protection Institute of Metal Reseach Shenyang 110015 China |
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| 摘 要： | 1 Introduction The aluminum bronze coatings on steel substrate which are sprayed by electric arc process have been developed as possible new candidates for the use to high temperature applications, while their corrosion properties at high temperature in …
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| 关 键 词： | 铝青铜 涂层 电弧喷镀 高温氧化 钢 |
| 收稿时间： | 2006-02-22 |
| 修稿时间： | 2006-04-04 |
High temperature performance of arc-sprayed aluminum bronze coatings for steel |
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| Authors: | ZHANG Zhong-li LI De-yuan WANG Shui-yong |
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| Affiliation: | 1. Laboratoire de Tribologie et Dynamique des Systèmes, Université de Lyon, Ecole Centrale de Lyon, 69134 Ecully, France;2. Bauman Moscow State Technical University, 2-Baumanskaia 5, Moscow 105005, Russia;3. Spanish National Research Council, Institute “Eduardo Torroja” (IETCC-CSIC), C/Serrano Galvache 4, Madrid 28033, Spain;4. Department of Mechanical Technology, Unversity Rey Juan Carlos, C/Tulipán s/n, Móstoles 28933, Madrid, Spain;5. Spanish National Research Council (CSIC), Institute of Materials Science of Madrid (ICMM-CSIC), C/Sor Juana Inés de la Cruz 3, Madrid 28049, Spain;1. Institute of Applied Mathematics and Mechanics, Peter the Great Polytechnic University, St-Petersburg 195251, Russia;2. Central Research Institute of Structural Materials “Prometey”, St-Petersburg 191015, Russia |
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| Abstract: | The high-temperature oxidation behavior of arc-sprayed aluminum bronze coatings on steel substrate was studied during isothermal exposures in air at 900 °C. The surface morphologies and interface of the coatings after isothermal oxidation at 900 °C for different times were observed. The experiments showed that the coatings on steel substrate were not deteriorated and the substrate was protected well, being exposed to high temperatures up to 900 °C. The coatings withstood more than ten times thermal shock tests without any coating separation. The thermal expansion coefficient of the coatings was measured, revealing not much difference between it and that of steel substrate. After exposure at high temperature, the coatings were still adhered to steel substrate well. Isothermal mass gain of the coatings at elevated temperature in dry air was measured by means of a thermal balance and the oxidation behavior was evaluated by oxidation kinetic curves, exhibiting the oxidation kinetics curve accorded with a parabolic law. The parabolic rate constant of the oxidation kinetic curve is 1.02×10−9 g2·cm−4·s−1 for the first 60 min and from 150 min to 2 880 min the constant is 5.1×10−12g2·cm−4·s−1. |
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| Keywords: | aluminum bronze coatings arc spray high temperature oxidation |
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