About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
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Advanced Coatings for Wear and Corrosion Protection
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| Presentation Title |
Temperature Dependent Morphological and Compositional Evolutions of the Water Vapor Induced Oxides in a Fe-Ni-Cr-Si-Mn-Nb Alloy |
| Author(s) |
Sung-Il Baik, Farahnaz Haftlang, Shipeng Shu, Maryam Kazemzadeh-Atoufi, Mark B. Davis, Deepak Kumar, Robin Ziebarth, Sandeep Dhingra, Robert D. Morgan, Peter W. Voorhees, David N. Seidman |
| On-Site Speaker (Planned) |
Farahnaz Haftlang |
| Abstract Scope |
The objectives of this study are to explore the carburization resistance of a pre-oxidized Ni-Cr-Fe- alloy for producing commercial ethylene at elevated temperatures. In this investigation, the superficial oxide layer’s durability is examined in the temperature range of 900-1100 °C in a carbonaceous environment in the presence of different oxygen partial pressures. According to our microstructural observations of pre-oxidized samples, the superficial oxide layer consists of Cr2O3 and a Mn oxide, as the outer layer, and SiO2 as the inner layer. The pre-oxidized sample exhibits excellent resistance to carbonaceous attack at 900°C. The surface oxide is partially spalled for alloys heat treated at 1000 °C. At 1100 °C, the dewetting process of the SiO2 layer has rapid oxidation kinetics with a continuous supply of Cr from the alloy’s matrix resulting in greater adherence of the superficial oxide layer to the alloy’s matrix and subsequently, prevention of its spallation. |