Solubility of Nitrogen in Liquid Chromium and Chromium-Iron Alloys
- 1 January 1983
- journal article
- Published by Iron and Steel Institute of Japan in Tetsu-to-Hagane
- Vol. 69 (8) , 913-920
- https://doi.org/10.2355/tetsutohagane1955.69.8_913
Abstract
The solubility of nitrogen in liquid chromium and chromium-iron alloys has been studied by a sampling method at the temperatures of 1550°1780°C and under 0.041.0 atm of nitrogen. The free energy of solution and the activity of nitrogen in liquid chromium and chromium-iron alloys were determined by applying the interstitial model for the experimental results. The results obtained are summerized as follows: (1) Nitrogen dissolved in liquid chromium and chromium-iron alloys upto 50% Fe does not obey Henry's law, and solubility of nitrogen in liquid chromium is given by the following equation. log K(Z)=5515/T-3.193, K(Z)=aN/√PN2=ψNZN/√PN2 (2) Activity coefficients of nitrogen based on pure liquid chromium are expressed as follows : log ψNN(cr)=(4235/T-1.513)·YN YNFeN(cr)=1.80·YFe YFecrN(Fe)=(-13765/T+3.10)·XCr XcrfcrN(Fe)=(-148/T+0.033)·[%Cr] [%Cr]N and ZN are the mole ratio and the lattice ratio of nitrogen in liquid metal respectively.Keywords
This publication has 1 reference indexed in Scilit:
- Nitrogen solution and titanium nitride precipitation in liquid Fe-Cr-Ni alloysMetallurgical Transactions B, 1977