density functional theory ,(dft) calculations have been performed to investigate the properties ofcarbon decorated (c-decorated) models of boron nitride (bn) nanocones. to this aim, the apex andtip of nanocone have been substituted by the carbon atoms to represent the c-decorated models. theresults indicated that dipole moments and energy gaps could reveal the effects of c-decorations onthe pro...

PEEK is being used increasingly often in seals, bushings, bearings, and other moving parts due to its excellent mechanical tribological properties. Herein, PEEK-based composites were prepared using PI as the organic filler h-BN nano-SiO2 particles inorganic fillers. There was significant improvement properties of at conditions above glass transition temperature; coefficient friction +20P/4B/4Si...

In this paper, we are concerned with the classification problem of proper holomorphic maps between balls in complex spaces. Write Bn = {z ∈ Cn : |z| < 1} and Prop(Bn,BN ) for the collection of all proper holomorphic maps from Bn into BN . We recall that f, g ∈ Prop(Bn,BN ) are said to be equivalent if there are elements σ ∈ Aut(Bn) and τ ∈ Aut (BN ) such that f = τ ◦ g ◦ σ . It is a well-known ...

Several unusual forms of natural graphite from an alkaline pegmatite that crosscuts rischorrite in the Hackman Valley, Khibiny Massif, Kola Peninsula, Russia are described. The graphite occurs macroscopically in two forms: as spherical aggregates up to 2 cm in diameter of friable, radially-aligned fibers ~20 μm in cross section, and as finegrained surface coatings in cavities covering aegirine,...

Stabilizations and atomic level quadrupole coupling constant (CQ) properties have been investigated for graphene–like monolayers (G–monolayers) of boron nitride (BN), boron phosphide (BP), aluminum nitride (AlN), and aluminum phosphide (AlP) structures. To this aim, density functional theory (DFT) calculations have been performed to optimize the model structures and also to evaluate the CQ para...

Density functional theory ,(DFT) calculations have been performed to investigate the properties ofcarbon decorated (C-decorated) models of boron nitride (BN) nanocones. To this aim, the apex andtip of nanocone have been substituted by the carbon atoms to represent the C-decorated models. Theresults indicated that dipole moments and energy gaps could reveal the effects of C-decorations onthe pro...