skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: In situ Raman spectroscopy of pressure-induced phase transformations in polycrystalline TbPO 4, DyPO 4, and Gd xDy (1–x)PO 4 [ In situ Raman spectroscopy of pressure-induced phase transformations in DyPO 4 and Gd xDy (1–x)PO 4]

Abstract

Xenotime DyPO 4 and Gd xDy (1–x)PO 4 (x = 0.4, 0.5, 0.6) (tetragonal I41amd zircon structure) have been studied at ambient temperature under high pressures inside a diamond anvil cell with in situ Raman spectroscopy. The typical Raman–active modes of the xenotime structure were observed at low pressures and the appearance of new Raman peaks at higher pressures indicated a phase transformation to a lower symmetry structure—likely monoclinic. Raman mode softening was observed, resulting in a line crossing at approximately 7–8 GPa for each material and preceding the phase transformation. The onset of phase transformation for DyPO 4 occurred at a pressure of 15.3 GPa. DyPO 4 underwent a reversible phase transformation and returned to the xenotime phase after decompression. The transformation pressures of the solid solutions (Gd xDy (1–x)PO 4) were in the range 10–12 GPa. The GdxDy(1–x)PO 4 solid solutions yielded partially reversible phase transformations, retaining some of the high–pressure phase spectrum while reforming xenotime peaks during decompression. The substitution of Gd into DyPO 4 decreased the transformation pressure relative to pure DyPO 4. In conclusion, the ability to modify the phase transformation pressures of xenotime rare–earth orthophosphates by chemical variations of solid solutions may provide additionalmore » methods to improve the performance of ceramic matrix composites.« less

Authors:
ORCiD logo [1];  [1]; ORCiD logo [2];  [1]
  1. Colorado School of Mines, Golden, CO (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1464024
Alternate Identifier(s):
OSTI ID: 1416390
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of the American Ceramic Society
Additional Journal Information:
Journal Volume: 101; Journal Issue: 6; Journal ID: ISSN 0002-7820
Publisher:
American Ceramic Society
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; phase transformations; phosphates; Raman spectroscopy; rare earths

Citation Formats

Musselman, Matthew A., Wilkinson, Taylor M., Haberl, Bianca, and Packard, Corinne E.. In situ Raman spectroscopy of pressure-induced phase transformations in polycrystalline TbPO4, DyPO4, and GdxDy(1–x)PO4 [In situ Raman spectroscopy of pressure-induced phase transformations in DyPO4 and GdxDy(1–x)PO4]. United States: N. p., 2017. Web. doi:10.1111/jace.15374.
Musselman, Matthew A., Wilkinson, Taylor M., Haberl, Bianca, & Packard, Corinne E.. In situ Raman spectroscopy of pressure-induced phase transformations in polycrystalline TbPO4, DyPO4, and GdxDy(1–x)PO4 [In situ Raman spectroscopy of pressure-induced phase transformations in DyPO4 and GdxDy(1–x)PO4]. United States. doi:10.1111/jace.15374.
Musselman, Matthew A., Wilkinson, Taylor M., Haberl, Bianca, and Packard, Corinne E.. Fri . "In situ Raman spectroscopy of pressure-induced phase transformations in polycrystalline TbPO4, DyPO4, and GdxDy(1–x)PO4 [In situ Raman spectroscopy of pressure-induced phase transformations in DyPO4 and GdxDy(1–x)PO4]". United States. doi:10.1111/jace.15374.
@article{osti_1464024,
title = {In situ Raman spectroscopy of pressure-induced phase transformations in polycrystalline TbPO4, DyPO4, and GdxDy(1–x)PO4 [In situ Raman spectroscopy of pressure-induced phase transformations in DyPO4 and GdxDy(1–x)PO4]},
author = {Musselman, Matthew A. and Wilkinson, Taylor M. and Haberl, Bianca and Packard, Corinne E.},
abstractNote = {Xenotime DyPO4 and GdxDy(1–x)PO4 (x = 0.4, 0.5, 0.6) (tetragonal I41amd zircon structure) have been studied at ambient temperature under high pressures inside a diamond anvil cell with in situ Raman spectroscopy. The typical Raman–active modes of the xenotime structure were observed at low pressures and the appearance of new Raman peaks at higher pressures indicated a phase transformation to a lower symmetry structure—likely monoclinic. Raman mode softening was observed, resulting in a line crossing at approximately 7–8 GPa for each material and preceding the phase transformation. The onset of phase transformation for DyPO4 occurred at a pressure of 15.3 GPa. DyPO4 underwent a reversible phase transformation and returned to the xenotime phase after decompression. The transformation pressures of the solid solutions (GdxDy(1–x)PO4) were in the range 10–12 GPa. The GdxDy(1–x)PO4 solid solutions yielded partially reversible phase transformations, retaining some of the high–pressure phase spectrum while reforming xenotime peaks during decompression. The substitution of Gd into DyPO4 decreased the transformation pressure relative to pure DyPO4. In conclusion, the ability to modify the phase transformation pressures of xenotime rare–earth orthophosphates by chemical variations of solid solutions may provide additional methods to improve the performance of ceramic matrix composites.},
doi = {10.1111/jace.15374},
journal = {Journal of the American Ceramic Society},
number = 6,
volume = 101,
place = {United States},
year = {Fri Dec 08 00:00:00 EST 2017},
month = {Fri Dec 08 00:00:00 EST 2017}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on December 8, 2018
Publisher's Version of Record

Save / Share:

Works referenced in this record:

Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides
journal, September 1976


Hydrostatic limits of 11 pressure transmitting media
journal, March 2009

  • Klotz, S.; Chervin, J-C.; Munsch, P.
  • Journal of Physics D: Applied Physics, Vol. 42, Issue 7, Article No. 075413
  • DOI: 10.1088/0022-3727/42/7/075413

High-pressure stability and compressibility ofAPO4 (A=La, Nd, Eu, Gd, Er, and Y) orthophosphates: An x-ray diffraction study using synchrotron radiation
journal, February 2010

  • Lacomba-Perales, R.; Errandonea, D.; Meng, Y.
  • Physical Review B, Vol. 81, Issue 6, Article No. 064113
  • DOI: 10.1103/PhysRevB.81.064113

Theoretical and experimental study of the structural stability of TbPO4 at high pressures
journal, April 2010

  • López-Solano, J.; Rodríguez-Hernández, P.; Muñoz, A.
  • Physical Review B, Vol. 81, Issue 14, Article No.144126
  • DOI: 10.1103/PhysRevB.81.144126

Calibration of the ruby pressure gauge to 800 kbar under quasi-hydrostatic conditions
journal, January 1986

  • Mao, H. K.; Xu, J.; Bell, P. M.
  • Journal of Geophysical Research, Vol. 91, Issue B5, p. 4673-4676
  • DOI: 10.1029/JB091iB05p04673