Structural damage in boron carbide under contact loading
作者： D Ge , V Domnich , T Juliano , E.A Stach , Y Gogotsi
DOI: 10.1016/J.ACTAMAT.2004.05.007
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摘要: Abstract A systematic study of mechanical deformation boron carbide under contact loading is conducted using scratching and depth-sensing indentation (nanoindentation). Both single crystal polycrystalline materials are investigated by means Raman microspectroscopy transmission electron microscopy (TEM). High resolution TEM images scratch debris reveal various microstructural changes including formation nanocrystals, as well lattice shearing distortion on nanoscale. Deformation bands microcracks oriented along the (1 1 3) planes visible in cross-sectional micrographs indentations. Narrow amorphous local disordered areas observed plan-view images. Evidence for a high-pressure phase also presented. It concluded that nanoindentation change microstructure similar manner. In addition, evidence sp 2 hybridized carbon result structural induced found energy loss spectroscopy (EELS).
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