|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Materials Processing Fundamentals
||Predominant Areas on a Partial Pressure Diagram for Multi-Component Systems: II. Applications, Gibbs Phase Rule and 3D Visualization
||H.H. Huang, Courtney Young
|On-Site Speaker (Planned)
Kellogg predominance area diagrams are normally used to present dominant solid species as a function of two gaseous species. The applications of the diagrams are in many scientific areas. Examples reported in the literature are illustrated and reconstructed. These include Pyrometallurgical processes: oxidation roasting of Cu-Fe and Zn-Fe sulfides and chlorination of Ti-Fe and Rare Earth oxides, Geochemical formation: Fe-S2-O2-SiO2 system under the magmatic condition, and Ti-Fe-S2-O2 system from Metamorphic process and Ceramic and Semiconductor processes: Volatility diagram and Dry etch of Cu-Cl system, and Hot wire Chemical vapor deposition of polynuclear silicon from silane gas. Examples also include the Cu-Fe-S2(g)-O2(g) diagram side-by-side with the ternary diagram of Cu-S-Fe system. Two methods of construction are: Line method plot the boundary for each predominant species surrounded by the other, the point method identifies the number of stable species and shows them restricted by mass balanced. Both methods satisfy the Gibbs phase rule during calculation as well as viewing the plotted diagram. The calculation for a 2-dimensional diagram can be extended into another dimension such as an additional gas species or temperature. Calculated results can be imported to a 3D personal computer program. A 3D wireframe volume plot of Cu under pS2, pO2, pCO2 system from Garrels and Christ was used to verify the calculation and presentation utilizing the ParaView program. A 3D graph permits visualization of an entire system by executing rotation, clipping, slicing and even making a movie.
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