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A typical HRTEM image of nano-WC recorded with the incident beam parallel to the  zone axis.
Selected x-ray diffraction patterns of nano-WC up to 35.6 GPa.
Experimental pressure-volume data for nano-WC up to 35.6 GPa. The variations of lattice constants with pressure are shown in the inset.
Unit-cell volumes as a function of pressure for WC obtained from first-principles calculations. The pressure dependent lattice constants and a supercell for WC are plotted in the inset.
Summary of bulk modulus , its pressure derivative , linear bulk moduli ( and ), and their pressure derivatives ( and ) for WC obtained from both high-pressure experiment and theoretical calculations.
Calculated elastic constants , bulk modulus , and shear modulus for WC (all in GPa). A set of previously reported data are listed for comparison.
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