Compressibility and structural stability of ultra-incompressible bimetallic interstitial carbides and nitrides

DOI: 10.1103/PhysRevB.85.144103

Authors: D. Errandonea (Universitat de València) , J. Ruiz-fuertes (Universitat de València) , J. Sans (Universitat de València) , D. Santamaria Perez (University Complutense of Madrid) , O. Gomis (Universitat Politècnica de València) , A. Gómez (Universitat Politècnica de València) , F. Sapiña (Universitat de Valencia)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review B , VOL 85 (14)

State: Published (Approved)
Published: April 2012
Diamond Proposal Number(s): 6517

Abstract: We have investigated by means of high-pressure x-ray diffraction the structural stability of Pd2Mo3N, Ni2Mo3C0.52N0.48, Co3Mo3C0.62N0.38, and Fe3 Mo3C. We have found that they remain stable in their ambientpressure cubic phase at least up to 48 GPa. All of them have a bulk modulus larger than 330 GPa, the least compressible material being Fe3Mo3C, B0 = 374(3) GPa. In addition, apparently a reduction of compressibility is detected as the carbon content is increased. The equation of state for each material is determined. A comparison with other refractory materials indicates that interstitial nitrides and carbides behave as ultra-incompressible materials.

Subject Areas: Physics


Instruments: I15-Extreme Conditions