Two steps CrAlFeSi coating on low carbon steel prepared by mechanical alloying and its oxidation properties



Document title: Two steps CrAlFeSi coating on low carbon steel prepared by mechanical alloying and its oxidation properties
Journal: Anais da Academia Brasileira de Ciencias
Database: PERIÓDICA
System number: 000435869
ISSN: 0001-3765
Authors: 1
2
1
1
1
1
1
Institutions: 1Indonesian Institute of Sciences, Research Center for Physics, Banten. Indonesia
2Mercu Buana University, Department of Mechanical Engineering, Jakarta. Indonesia
Year:
Volumen: 92
Number: 3
Country: Brasil
Language: Inglés
Document type: Artículo
Approach: Aplicado, descriptivo
English abstract Two steps CrAlFeSi coating has been fabricated on low carbon steel via mechanical alloying methods and its oxidation properties have been elucidated thoroughly. First, Al coating was deposited on the low carbon steel substrate via mechanical alloying for 1 h. Afterward, CrAlFeSi coating was deposited on Al coating using the same technique for 2 h. The effect of annealing at 650 °C on the oxidation behavior of two steps CrAlFeSi coatings was examined thoroughly. The microstructure of the coating layer before and after annealing was relatively similar. Microholes and microcracks were found in the coating layer of the substrate before and after annealing. Intermetallic phases were observed in the samples along with the major elements. The mass gain after cyclic oxidation at 800 °C in the air atmosphere for a substrate with two coating layers reduced by a factor of 10 compared to the substrate without coating layer, which is likely due to the formation of Al2O3 on the outer layer during the oxidation process. The thin layer of Al2O3 protects the inner layer from severe oxidation. Therefore, the two steps coating of CrAlFeSi on the low carbon steel can be used as an alternative method for reducing the oxidation at high temperature
Disciplines: Ingeniería
Keyword: Ingeniería metalúrgica,
Aleación mecánica,
Acero de bajo carbón,
Recubrimientos,
Recocido,
Oxidación
Keyword: Metallurgical engineering,
Mechanical alloying,
Coatings,
Annealing,
Oxidation
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