Thermodynamic Assessment of the PO-NaO and PO-MgO Systems.

Knowledge about the thermodynamic equilibria of the PO-NaO and PO-MgO systems is very important for controlling the phosphorus content of steel materials in the process of steelmaking dephosphorization. The phase equilibrium and thermodynamic data of the PO-NaO and PO-MgO systems were critically evaluated and re-assessed by the CALPHAD (CAlculation of PHAse Diagram) approach. The liquid phase was described by the ionic two-sublattice model for the first time with the formulas (Na)(O, PO, PO, PO) and (Mg)(O, PO, PO, PO), respectively, and the selection of the species constituting the liquid phase was based on the structure of the phosphate melts.

Insight-HXMT observations of jet-like corona in a black hole X-ray binary MAXI J1820+070.

A black hole X-ray binary produces hard X-ray radiation from its corona and disk when the accreting matter heats up. During an outburst, the disk and corona co-evolves with each other. However, such an evolution is still unclear in both its geometry and dynamics.