Site occupancies in ternary C15 ordered Laves phases

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Site occupancies in three C15-structured AB{sub 2}(X) Laves phases have been determined by Atom Location by CHanneling Enhanced MIcroanalysis (ALCHEMI). In NbCr{sub 2}(V), the results were consistent with exclusive site occupancies of Nb for the A sublattice and Cr and V for the B sublattice. The B-site occupancy of V is not expected from atom size effects alone. In NbCr{sub 2}(Ti), the results were consistent with Ti partitioning mostly to the A sites with some anti-site defects likely. In HfV{sub 2}(Nb), the results were consistent with Nb partitioning between the A and B sites. The results of the ALCHEMI analyses ... continued below

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8 p.

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Kotula, P.G.; Chu, F.; Thoma, D.J.; Mitchell, T.E.; Anderson, I.M. & Bentley, J. December 31, 1996.

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Description

Site occupancies in three C15-structured AB{sub 2}(X) Laves phases have been determined by Atom Location by CHanneling Enhanced MIcroanalysis (ALCHEMI). In NbCr{sub 2}(V), the results were consistent with exclusive site occupancies of Nb for the A sublattice and Cr and V for the B sublattice. The B-site occupancy of V is not expected from atom size effects alone. In NbCr{sub 2}(Ti), the results were consistent with Ti partitioning mostly to the A sites with some anti-site defects likely. In HfV{sub 2}(Nb), the results were consistent with Nb partitioning between the A and B sites. The results of the ALCHEMI analyses of these ternary C15 Laves phase materials will be discussed with respect to previously determined phase diagrams and first-principles total energy and electronic structure calculations.

Physical Description

8 p.

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INIS; OSTI as DE97001690

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  • 1996 Fall meeting of the Materials Research Society (MRS), Boston, MA (United States), 2-6 Dec 1996

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  • Other: DE97001690
  • Report No.: LA-UR--96-4068
  • Report No.: CONF-961202--30
  • Grant Number: W-7405-ENG-36
  • DOI: 10.2172/441755 | External Link
  • Office of Scientific & Technical Information Report Number: 441755
  • Archival Resource Key: ark:/67531/metadc677597

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  • December 31, 1996

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  • July 25, 2015, 2:21 a.m.

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  • May 20, 2016, 3:09 p.m.

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Kotula, P.G.; Chu, F.; Thoma, D.J.; Mitchell, T.E.; Anderson, I.M. & Bentley, J. Site occupancies in ternary C15 ordered Laves phases, report, December 31, 1996; New Mexico. (digital.library.unt.edu/ark:/67531/metadc677597/: accessed July 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.