نتایج جستجو برای: boron carbide
تعداد نتایج: 26716 فیلتر نتایج به سال:
In response to Werheit's Comment, we first discuss the following three points: (i) Attribution of Raman bands with help calculations based on density functional perturbation theory (DFPT), (ii) similarity spectrum boron carbide $\ensuremath{\alpha}$ rhombohedral boron, and (iii) dependence experimental frequency excitation laser. Central point at stake, also present a computed for time 405-atom...
Disordered structures of boron nitride (BN), graphite, boron carbide (BC), and boron carbon nitride (BCN) systems are considered important precursor materials for synthesis of superhard phases in these systems. However, phase transformation of such materials can be achieved only at extreme pressure-temperature conditions, which is irrelevant to industrial applications. Here, the phase transitio...
Grain boundaries, ubiquitous in real materials, play an important role the mechanical properties of ceramics. Using boron carbide as a typical superhard but brittle material under hypervelocity impact, we report atomistic reactive molecular dynamics simulations using ReaxFF force field fitted to quantum mechanics examine grain-boundary engineering strategies aimed at improving properties. In pa...
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