Mayar Mohammed Mostafa Mohammed Ali <br/><br/>
High temperature oxidation of non-equiatomic AL₅CR₁₂FE₃₅ MN₂₈NI₂₀ high entropy alloy /  
 عالية الانتروبى AlCrFeMnNi دراسة سلوك الاكسدة عند درجات الحرارة العالية لسبيكة  
Mayar Mohammed Mostafa Mohammed Ali ; Supervised Fawzi A.A. Elrefaie , Hafiz A. Ahmed , Mohamed Abdelhady Gepreel 
 - Cairo :   Mayar Mohammed Mostafa Mohammed Ali ,   2019 
 - 82 P. :   charts , facsimiles ;   30cm  
<br/><br/>Thesis (M.Sc.) - Cairo University - Faculty of Engineering - Department of  Metallurgical Engineering  
<br/><br/> Oxidation behavior of non-equiatomic AL₅CR₁₂FE₃₅ MN₂₈NI₂₀ high entropy alloy was investigated at 900-1100 in air for continuous 100 hours. The oxidation rate followed parabolic law with an activation energy equals to 100.8 kJ/mol. At all temperatures the alloy produced a duplex layer scale consisted of manganese oxides that overlays layer of Mn-Cr-Fe spinel oxides. While at 1000-1100 the alloys were also oxidized internally consisted of aluminum oxide precipitates deep in the alloy. The samples oxidized at 1000 for 1 and 24 hours formed scale of Mn3O4 overlaying Mn-Cr-Fe rich spinel oxide 
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<br/><br/><label>Subjects--Index Terms: </label>AlCrFeMnNi high entropy alloy High temperature oxidation  Manganese oxides