Meso-porous metal materials have enhanced surface energies offering unique surface properties with potential applications in chemical catalysis, molecular sensing and selective separation. In this paper, commercial 20 nm diameter metal nano-particles, including silver and copper were blended with 7 nm silica nano-particles by shear mixing. The resulted powders were cold-sintered to form dense, ...

The present study examines the effect of silicon dioxide (SiO2) nano-additives on performance and emission characteristics a diesel engine fuelled with soybean biodiesel. Soybean biofuel was prepared using transesterification process. morphology studied scanning electron microscopy (SEM), X-ray diffraction (XRD) energy-dispersive spectroscopy (EDS). Ultrasonication process used for homogeneous ...

In this study, the effect of variety of Nano- additives doping on the hydration resistance of the MgO-CaO system was investigated. Samples were prepared from calcined dolomite and magnesite. Nano-additives that contained cations with various valences (trivalent and tetravalent) used as  a dopant. The bulk density, apparent porosity and hydration resitance were studied and evaluated. Also, phase...

Despite SiGe being one of the most widely studied thermoelectric materials owing to its application in radioisotope thermoelectric generators (RTG), the thermoelectric figure-of merit (ZT) of p-type SiGe is still quite low, resulting in poor device efficiencies. In the present study, we report a substantial enhancement in ZT∼ 1.2 at 900 °C for p-type nanostructured Si80Ge20 alloys by creating s...

Electrochemical migration (ECM) of sintered nano-Ag could be a serious reliability concern for power devices with high-density packaging. An anti-ECM nano-Ag-SiOx paste was proposed by doping 0.1wt% SiOx nanoparticles rather than previously used expensive noble metals, e.g., palladium. The ECM lifetime the 1.5 to 3 times longer that nano-Ag, due fact protect Ag from oxidation. thermo-mechanical...

Nano-Y2O3 reinforced Ti-47.7Al-7.1Nb-(V, Cr) alloy was fabricated by a powder metallurgy route using spark plasma sintering (SPS), and the influence of nano-Y2O3 contents on microstructure mechanical properties were investigated systematically. The results revealed that ultimate tensile strength elongation 570 ± 28 MPa 1.7 0.6% at 800 °C, 460 23 6.1 0.4% 900 °C with no nano-Y2O3, 662 24 5.5 0.5...

For certain product applications in pharmaceutical, chemical and material sectors, sintering of powders while retaining grain sizes in the sub-micron range becomes a critical processing step. The key to nanosintering and compaction is to achieve densification by limiting coarsening and undesirable microstructural transformations. Densification commonly results in grain coarsening. Nanosintering...

Abstract The introduction of different additives into the cooling and lubrication systems in metal cutting process, contributed to improving machining process sustainability. Different types can help reduce friction, wear contact surfaces, improve heat dissipation from zone, etc. With development nanotechnology, great focus has been placed on investigation using nano-particles, nano-additives n...

Nano-crystalline Sr0.5Ba0.5Nb2O6 powders with addition of LiNbO3 or LiF as sintering additives were prepared by a soft-chemistry synthesis using polyethylene glycol. Calcination at 600 ?°C results in nanocrystalline (dcryst. ?? ?30 ?nm) which sintered between 1000 and 1300 to ceramic bodies. By 10 20 ?mol% LiNbO3, the temperature was reduced about 200 ?K activation energy initial stage decrease...