High-pressure study of low-compressibility Ta2N
Data(s) |
18/09/2007
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Resumo |
Room temperature synchrotron x-ray diffraction experiments were performed on nanocrystal Ta<sub>2</sub>N in a diamond anvil cell to a pressure of 55.48 GPa. This nitride is a well-known kind of high-hardness material, and it is found to be highly incompressible. The structure is stable with no phase transitions observed in this pressure range. The zero-pressure bulk modulus and its pressure derivative at ambient pressure are B<sub>0</sub> = 360 ± 3 GPa, B<sub>0</sub>' = 4, and in room conditions, the a and c parameters are 3.054 Å, 4.996 Å, respectively. The bulk modulus of Ta<sub>2</sub>N is greater than those of TaC, ε-TaN, Cr<sub>2</sub>N and MoN. The differences in bulk moduli might be due to the differences in structure and the cohesive energy among these phases.<br /> |
Identificador | |
Idioma(s) |
eng |
Publicador |
Institute of Physics Publishing |
Relação |
http://hdl.handle.net/10.1088/0953-8984/19/42/425233 |
Direitos |
2007, Institute of Physics Publishing |
Palavras-Chave | #elastic moduli #high pressure effects #nanocrystals #nitrides #phase transitions #x ray diffraction analysis |
Tipo |
Journal Article |