Abstract
The activities of Nd in the Nd–Fe alloys were determined by double Knudsen cell mass spectrometry. The activities of Nd in Nd–Fe alloys with Nd concentration from 8.5 to 93 at% were determined at 1373–1523 K, measuring the ion current of vapor of Nd in equilibrium with melts, Nd 2Fe 17 + γFe, Nd 2Fe 17 + liquid, and γFe + liquid. The standard Gibbs energy of formation of Nd 2Fe 17 was calculated from the activities of Nd obtained from the measurement, as follows: 2 Nd ( l ) + 17 Fe ( γ ) = N d 2 F e 17 ( s ) , Δ G f Nd 2 F e 17 ° = − 238,000 + 130 T ± ( 21,000 ) J/mol ( 1373 – 1473 K ) . The activities of Fe in Nd–Fe alloys were calculated based on the Gibbs–Duhem equation.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
