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Nucleation thermodynamics of cubic boron nitride upon high-pressure and high-temperature supercritical fluid system in nanoscale

Article Abstract:

A thermodynamic analysis in nanoscale is proposed, with respect to the effect of nanosize-induced additional pressure on Gibbs free energy of critical nuclei of cubic boron nitride, to elucidate nucleation of c-BN in a high-pressureband high temperature supercritical fluid system. The results indicate the effect of surface tension induced by the nanosize curvature of critical nuclei could drive the metastable phase region of x-BN nucleation into stable phase region in the phase diagram.

Boron nitride

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A nanoscaled thermodynamic approach in nucleation of CVD diamond on nondiamond surfaces

Article Abstract:

Diamond nucleation was studied in relation to nanoscaled thermodynamics aiming at a clear insight into heterogeneous nucleation of CVD diamond. The nanothermodynamic analyses are expected to be a general approach to elucidate nucleation of diamond and related materials in low-temperatures and low-pressure gas phase.

Gem Diamonds, All Other Nonmetallic Mineral Mining, Miscellaneous nonmetallic minerals, Diamonds, Chemical vapor deposition, Diamond crystals, Chemical vapour deposition

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Size-dependent formation enthalpy of nanocompounds

Article Abstract:

A quantitative thermodynamics model for the size-dependent formation enthalpy of nanocompounds is proposed. The thermal stability of nanocompounds decreases as the size dependence of formation enthalpy when the size of these nanostructures decreases.

Enthalpy, Nanoparticles

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