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Melting temperature measurement of refractory oxide ceramics as a function of oxygen fugacity using containerless methods

Journal Article · · Journal of the American Ceramic Society
DOI:https://doi.org/10.1111/jace.17216· OSTI ID:1648884
 [1];  [2];  [2];  [3];  [4]
  1. Univ. of California, Davis, CA (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Materials Development, Inc., Arlington Heights, IL (United States); Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
  4. Univ. of California, Davis, CA (United States); Arizona State Univ., Tempe, AZ (United States)
An aerodynamic conical nozzle levitator (CNL) has been used to measure the melting temperatures of refractory ceramics. The well-established method of cooling traces has been adapted to allow measurements for air-sensitive samples using a controlled atmosphere, where the oxygen partial pressure can be adjusted and monitored in real time. In this study, we explain the details of a system that we developed for use at the Spallation Neutron Source (Oak Ridge National Laboratory). Measurements of the melting behavior of (Fe,Cr,Al)3O4 spinels were made between log (PO2 (atm)) of -0.7 and -5. The melting temperature of hercynite is found to be oxygen potential dependent, ranging between 1692 and 1767°C at log (PO2) values from -4.42 to -0.70.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE; USDOE Office of Nuclear Energy (NE)
Grant/Contract Number:
AC02-06CH11357; AC05-00OR22725
OSTI ID:
1648884
Alternate ID(s):
OSTI ID: 1632217
OSTI ID: 1756847
Journal Information:
Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 9 Vol. 103; ISSN 0002-7820
Publisher:
American Ceramic SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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