Thermodynamics of oxygen and nitrogen in liquid nickel equilibrated with CaO-TiO[sub x] and CaO-TiO[sub x]-Al[sub 2]O[sub 3] melts

Journal Article · Tue Feb 01 00:00:00 EST 1994 · Metallurgical Transactions, B (Process Metallurgy); (United States)

OSTI ID:7284061

Cho, S W; Suito, Hideaki ^[1]

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1. Tohoku Univ., Sendai (Japan)

Equilibrium between CaO-TiO[sub x] or CaO-TiO[sub x]-Al[sub 2]O[sub 3] slags and liquid nickel with respect to oxygen and nitrogen has been studied at 1873 K as a function of Ti (or Al) content in metal, using lime and alumina crucibles. The Al-O, Ti-O, and Ti-Al relations were obtained for liquid nickel equilibrated with these slags. Nitride capacity, C[sub (N)], defined by (mass pct N)[center dot] P[sub O[sub 2]][sup 3/4]/P[sub N[sub 2]][sup 1/2], was evaluated from nitrogen distribution ratios, L[sub N] [l brace]= (mass pct N)/[mass pct N][r brace], coupled with oxygen content in liquid nickel. Activities of Al[sub 2]O[sub 3] and activity coefficients of TiO[sub 2] and TiO[sub 1.5] were estimated either from the content of Al, Ti, and O, using the compiled data for the free energy of formation of oxide and the respective interaction parameters or from the values for L[sub N] and C[sub (N)].

• OSTI ID: 7284061
• Journal Information: Metallurgical Transactions, B (Process Metallurgy); (United States), Vol. 25:1; ISSN 0360-2141
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
THERMODYNAMIC PROPERTIES
CALCIUM OXIDES
NICKEL BASE ALLOYS
FABRICATION
TITANIUM OXIDES
LIQUID METALS
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
ALUMINIUM COMPOUNDS
CALCIUM COMPOUNDS
CHALCOGENIDES
ELEMENTS
FLUIDS
LIQUIDS
METALS
NICKEL ALLOYS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties
360101 - Metals & Alloys- Preparation & Fabrication