The bone mineral consists of tiny hydroxyapatite (HA) crystals in the nanoregime. Nanostructured HA is also expected to have better bioactivity than coarser crystals. This paper reports on the in vitro evaluation of bone like HA nanopowders. The prepared HA nanopowder was characterized for its phase purity, chemical homogeneity and bioactivity. Fourier transform infrared (FT-IR) s...

This article focuses on turning superalloy Udimet 720, which is difficult to work with, using different coolant/lubricant methods. The study includes delivering Graphene and Multi-Walled Carbon Nanotubes nanopowders homogeneously dispersed in vegetable oil the cutting area with minimum quantity lubrication (MQL) method. Experiments at speeds feed rates were repeated four environments. Compared ...

A new approach for the development of thermoelectric materials, which focuses on a high-power factor instead large figure merit zT, has drawn attention in recent years. In this context, properties Cu-Ni-based alloys with very high electrical conductivity, moderate Seebeck coefficient, and therefore power are presented as promising low-cost alternative materials applications aiming to have outpu...

Abstract Was carried out the assessment of photocatalytic, cytotoxic properties on cells and antibacterial against E. coli Staphylococcus oxides nanopowders with nanoscale silver coating. Is shown promising use such composites as a photocatalytic agent, well in medicine.

Two-dimensional hexagonal boron nitride (hBN) has attracted large attentions as platforms for realizations integrated nanophotonics and collective effort been focused on the spin defect centers. Here, temperature dependence of resonance spectrum in range 5-600 K is investigated. The zero-field splitting (ZFS) parameter D found to decrease monotonicly with increasing can be described by Varshni ...

Spark plasma sintering has been used for the first time to prepare the ASTM F75 cobalt-chromium-molybdenum (Co-Cr-Mo) orthopaedic alloy composition using nanopowders. In the preliminary work presented in this report, the effect of processing variables on the structural features of the alloy (phases present, grain size and microstructure) has been investigated. Specimens of greater than 99.5 per...

The synthesis parameters and results of investigation of electrical properties of nanopowders produced by a spark erosion of silver electrodes in the air are presented. The powders are composed mostly of metallic silver (52.9 wt. %) and silver nitrate (46.5 wt. %) particles with the size less than 50 nm as determined from the transmission electron microscopy images and their specific surface ar...