Iron, nickel and its alloys are critically important materials for industrial and technological applications due to their unique magnetic properties, strength, and thermal expansion. In this study, lasers were used to compress and heat Fe36Ni alloy (36 wt% Ni) and pure nickel up to the melting temperature using a combination of shock and ramp compression. The structure was measured using nanosecond in-situ x-ray diffraction, and simultaneous velocimetry was used to measure the pressure up to 454 GPa. A mixed face-centered-cubic (fcc) solid–liquid phase in Fe36Ni at 311 GPa provides experimental evidence that, compared to pure iron, the incorporation of nickel expands the stability field of the fcc phase to the melting curve. At lower temperatures, a mixed fcc and hexagonal-close-packed (hcp) phase is observed in ramp-compressed Fe36Ni at 278 GPa. At the higher compressions, a structure inconsistent with fcc, hcp, and body-centered cubic (bcc) is observed. In the case of pure Ni, the fcc phase is stable under ramp compression up to 402 GPa.
Polsin, D. N., et al. "Atomic structure and melting of Ni and Fe<sub>36</sub>Ni up to 400 GPa." Physical Review. B, vol. 109, no. 21, Jun. 2024. https://doi.org/10.1103/physrevb.109.214112
Polsin, D. N., Chin, D. A., Duffy, T. S., Ginnane, M., Gong, X., Hansen, L. E., LaPierre, A. J., Marshall, M. C., Collins, G. W., & Rygg, J. R. (2024). Atomic structure and melting of Ni and Fe<sub>36</sub>Ni up to 400 GPa. Physical Review. B, 109(21). https://doi.org/10.1103/physrevb.109.214112
Polsin, D. N., Chin, D. A., Duffy, T. S., et al., "Atomic structure and melting of Ni and Fe<sub>36</sub>Ni up to 400 GPa," Physical Review. B 109, no. 21 (2024), https://doi.org/10.1103/physrevb.109.214112
@article{osti_2382766,
author = {Polsin, D. N. and Chin, D. A. and Duffy, T. S. and Ginnane, M. and Gong, X. and Hansen, L. E. and LaPierre, A. J. and Marshall, M. C. and Collins, G. W. and Rygg, J. R.},
title = {Atomic structure and melting of Ni and Fe<sub>36</sub>Ni up to 400 GPa},
annote = {Iron, nickel and its alloys are critically important materials for industrial and technological applications due to their unique magnetic properties, strength, and thermal expansion. In this study, lasers were used to compress and heat Fe36Ni alloy (36 wt% Ni) and pure nickel up to the melting temperature using a combination of shock and ramp compression. The structure was measured using nanosecond in-situ x-ray diffraction, and simultaneous velocimetry was used to measure the pressure up to 454 GPa. A mixed face-centered-cubic (fcc) solid–liquid phase in Fe36Ni at 311 GPa provides experimental evidence that, compared to pure iron, the incorporation of nickel expands the stability field of the fcc phase to the melting curve. At lower temperatures, a mixed fcc and hexagonal-close-packed (hcp) phase is observed in ramp-compressed Fe36Ni at 278 GPa. At the higher compressions, a structure inconsistent with fcc, hcp, and body-centered cubic (bcc) is observed. In the case of pure Ni, the fcc phase is stable under ramp compression up to 402 GPa.},
doi = {10.1103/physrevb.109.214112},
url = {https://www.osti.gov/biblio/2382766},
journal = {Physical Review. B},
issn = {ISSN 2469-9950},
number = {21},
volume = {109},
place = {United States},
publisher = {American Physical Society (APS)},
year = {2024},
month = {06}}
SHOCK COMPRESSION OF CONDENSED MATTER - 2015: Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter, AIP Conference Proceedingshttps://doi.org/10.1063/1.4971671