Synthesis and Structural Stability of Ti2GeC

Journal Article · Thu Jan 01 04:00:00 EST 2009 · Journal of Alloys and Compounds

DOI:https://doi.org/10.1016/j.jallcom.2008.06.073· OSTI ID:980601

Phatak, N; Saxena, S; Fei, Y; Hu, J

In this paper we report the synthesis of a ternary-layered ceramic, Ti2GeC, a 211 Mn+1AXn compound by hot-pressing. X-ray analysis confirmed the hexagonal crystal symmetry. Using a synchrotron radiation and a diamond anvil cell, we measured the pressure dependencies of the lattice parameters. The phase is structurally stable up to the 49 GPa-the maximum experimental pressure reached. The bulk modulus of Ti2GeC calculated using the Birch-Murnaghan equation of state is 211 {+-} 4 GPa with K? = 3.9 {+-} 0.2. Surprisingly the bulk modulus was found to be greater than both Ti2AlC and Ti2SC by 13% and 10%. Also, Ti2GeC has the highest bulk modulus among M2GeC phases where M = Ti, V, Cr.

• Research Organization: Brookhaven National Laboratory (BNL) National Synchrotron Light Source
• Sponsoring Organization: Doe - Office Of Science
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 980601
• Report Number(s): BNL--93519-2010-JA
• Journal Information: Journal of Alloys and Compounds, Journal Name: Journal of Alloys and Compounds Vol. 474; ISSN 0925-8388; ISSN JALCEU
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
CRYSTALS
DIAMONDS
EQUATIONS
HOT PRESSING
LATTICE PARAMETERS
STABILITY
SYMMETRY
SYNCHROTRON RADIATION
SYNTHESIS
national synchrotron light source