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Stability Of Cementite Formed From Hematite And Titanomagnetite Ore, Raymond J. Longbottom, Oleg Ostrovski, Jianqiang Zhang, David J. Young
Stability Of Cementite Formed From Hematite And Titanomagnetite Ore, Raymond J. Longbottom, Oleg Ostrovski, Jianqiang Zhang, David J. Young
Faculty of Engineering - Papers (Archive)
The stability of cementite formed during the reduction of hematite and preoxidized titanomagnetite ores in a methane-hydrogen gas mixture was examined in the temperature interval 500oC to 900oC for the hematite ore and 300oC to 1100oC for titanomagnetite. Cementite formed from hematite ore was most stable at temperatures between 750oC to 770oC. Its decomposition rate increased with decreasing temperature between 750oC and 600oC and with increasing temperature above 770oC. Cementite formed from preoxidized titanomagnetite was most stable in the temperature range 700 …
Phase Stability And Consolidation Of Glassy/Nanostructured Al85ni9nd4co2 Alloys, Laichang Zhang, M Calin, M Branzei, L Schultz, J Eckert
Phase Stability And Consolidation Of Glassy/Nanostructured Al85ni9nd4co2 Alloys, Laichang Zhang, M Calin, M Branzei, L Schultz, J Eckert
Faculty of Engineering - Papers (Archive)
Al85Ni9Nd4Co2 metallic glass/nanostructured ribbons and powders were used as starting materials for producing bulk amorphous/nanostructured Al-based alloys. Glassy ribbons were obtained by melt spinning at wheel surface velocities ranging from 5 to 37 m/s. The amorphous ribbons exhibited a supercooled liquid region of ∼20 K, a reduced glass transition temperature of ∼0.47 and γ ∼ 0.328. Mechanical alloying of the elemental powder mixture did not lead to amorphization. However, amorphous powders obtained by milling the glassy ribbons for 9 h exhibited a thermal stability similar to the initial ribbons. Isothermal differential scanning calorimetry …