Compressibility of Nb[supscript 2]AsC to 41 GPa

Journal Article · Mon Jul 19 04:00:00 EDT 2010 · Appl. Phys. Lett.

DOI:https://doi.org/10.1063/1.1884261· OSTI ID:1008506

Kumar, R S; Rekhi, S; Cornelius, A L; Barsoum, M W ^[1]

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1. UNLV

Room temperature synchrotron x-ray diffraction experiments were performed on the layered hexagonal ternary carbide Nb{sub 2}AsC in a diamond anvil cell to a pressure of 41 GPa. The structure is stable with no phase transitions observed in this pressure range. The bulk modulus is 224 {+-} 2 GPa, with a pressure derivative of 4; the former is the highest bulk modulus for a M{sub n+1}AX{sub n} (MAX) phase, including Ti{sub 3}SiC{sub 2}, measured to date. Nb{sub 2}AsC is also the first MAX phase for which the compressibility along the a direction is higher than along the c direction; in other words, the c/a ratio increases strongly with applied pressure.

• Research Organization: Advanced Photon Source (APS), Argonne National Laboratory (ANL), Argonne, IL (US)
• Sponsoring Organization: USDOE
• OSTI ID: 1008506
• Journal Information: Appl. Phys. Lett., Journal Name: Appl. Phys. Lett. Journal Issue: (11) ; 03, 2005 Vol. 86; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

43 PARTICLE ACCELERATORS
CARBIDES
COMPRESSIBILITY
DIAMONDS
PRESSURE RANGE
SYNCHROTRONS
X-RAY DIFFRACTION