Synthesis of a New MAX Compound (Cr0.5V0.5)2GeC and its Compressive Behavior up to 49 GPa

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

DOI:https://doi.org/10.1016/j.jallcom.2008.07.102· OSTI ID:980604

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

In this paper we report for the first time the synthesis of a new ternary layered ceramic (Cr0.5V0.5)2GeC, a 211 Mn+1AXn compound by hot-pressing. Scanning electron microscopy and X-ray diffraction were used to characterize and confirm the hexagonal crystal structure of this ternary layered ceramic. The calculated lattice parameters are a = 2.9773 A and c = 12.1619 A. Using a diamond anvil cell and synchrotron radiation we also report the pressure dependencies of the lattice parameters. No phase transformation was observed and the phase is stable up to 49 GPa. The bulk modulus of (Cr0.5V0.5)2GeC calculated using the Birch-Murnaghan equation of state is 219 {+-} 5 GPa with K? = 4.1 {+-} 0.3, which is higher than the end members V2GeC and Cr2GeC.

• Research Organization: Brookhaven National Laboratory (BNL) National Synchrotron Light Source
• Sponsoring Organization: Doe - Office Of Science
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 980604
• Report Number(s): BNL--93522-2010-JA
• Journal Information: Journal of Alloys and Compounds, Journal Name: Journal of Alloys and Compounds Vol. 475; ISSN 0925-8388; ISSN JALCEU
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
43 PARTICLE ACCELERATORS
BEHAVIOR
CERAMICS
CRYSTAL STRUCTURE
DIAMONDS
EQUATIONS
HOT PRESSING
LATTICE PARAMETERS
PHASE TRANSFORMATIONS
SCANNING ELECTRON MICROSCOPY
SYNCHROTRON RADIATION
SYNTHESIS
X-RAY DIFFRACTION
national synchrotron light source