Dynamic impact strength of diamond-SiC superhard composite
نویسندگان
چکیده
منابع مشابه
Experimental investigation of mechanical and dynamic impact properties of high strength cementitious composite containing micro steel and PP fibers
Cementitious composites are one of the most consumed construction materials in the world. The use of cementitious composites is increasing due to their special characteristics. The behavior of high strength cementitious composites is improved by increasing the fiber percentage. In the present paper, the effects of steel microfibers and polypropylene fibers on mechanical properties and impact re...
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Superhard substances are those a hardness above 20 GPa, i.e. higher than that of corundum (Kislii et al.,1988) or with a Vickers hardness Hv exceeding 40 GPa (Sologenko&Gregorianz, 2005). The ten utmost non-metal substances and refractory compounds form a "hardness pyramid" (Kislii et al.,1988) diamond being on top, followed by cubic-boron nitride and boron carbide. Metal-like ones form a simil...
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Shock consolidation experiments were conducted via flyer impact on synthetic diamond (6-12 ^m) and cubic boron nitride (c-BN) (4-8 /im) admixed with SiC whisker (SCW), Si3N4 whisker (SNW), SiC powder, and Si powder contained in stainless steel capsules under the shock pressure range of 10-30 GPa. Scanning electron microscopy and transmission electron microscopy imaging of the samples revealed n...
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Compressing glassy carbon above 40 GPa, we have observed a new carbon allotrope with a fully sp(3)-bonded amorphous structure and diamondlike strength. Synchrotron x-ray Raman spectroscopy revealed a continuous pressure-induced sp(2)-to-sp(3) bonding change, while x-ray diffraction confirmed the perseverance of noncrystallinity. The transition was reversible upon releasing pressure. Used as an ...
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ژورنال
عنوان ژورنال: Acta Physica Sinica
سال: 2019
ISSN: 1000-3290
DOI: 10.7498/aps.68.20190350