ÐWe analyse the development of shear bands in axisymmetric, thermomechanical deformations of a circular tungsten heavy alloy (WHA) rod impacting at normal incidence a smooth rigid target. The rod's material is modeled either as a mixture of Fe±Ni±W particles interspread randomly among the W-particles or as a homogeneous alloy. For comparison purposes we also analyse deformations of a pure W and...

Genuine, nondegraded PAMAM dendrimers self-assemble with siRNA into nanoscale particles that are efficient for siRNA delivery and induce potent endogenous gene silencing.

Nano-dispersed Fe and Fe3O4 on reduced graphene oxide (Fe /Fe3O4-RGO) was prepared and characterized. The prepared Fe/Fe3O4-RGO was used as a magnetically separable Fenton-like catalyst and showed superior catalytic activity compared to Fe3O4-RGO and Fe3O4 as well as other Fenton-like catalysts for the removal of phenol. The Fe/Fe3O4-RGO achieved 100% removal efficiency for phenol within 30 min...

The objective of this study is to evaluate the emulsifier role in the synthesis of Iron Polyaniline nanocomposite by in-situ oxidative polymerization of aniline and reduction of Iron ions into Fe nanoparticles. The polymerization of aniline was carried out in the presence of FeCl as oxidizing agent. During the reaction 3 aniline monomers undergo oxidation and form polyaniline (PANI) whereas the...

Nanoscale zerovalent iron (NZVI) such as Toda Kogyo RNIP-10DS has been used for site remediation, yet information is lacking regarding how far injected NZVI can travel, how long it lasts, and how it transforms to other minerals in a groundwater system. Previously we reported effective mass destruction of chlorinated ethenes dominated by tetrachloroethene (PCE) using emulsified zerovalent iron (...

An Al-1.08 vol.%Si alloy was cold rolled to a reduction of 98% (vM = 4.5) and then annealed at different temperatures up to 210C (0.52 Tm) for different times. The deformed structure is characterized by a nanoscale lamellar structure with the presence of Si particles of coarse (> 1m), medium (100 nm – 1 m) and fine (< 100 nm) sizes in the microstructure. Deformation zones are formed around ...

We investigate the effect of nanoscale variations in the surface roughness of individual particles on macroscale granular flow characteristics. Experiments were conducted in circular rotating tumblers with smooth and rough 2 and 3 mm steel particles. The smooth beads had a rms surface roughness of approximately 30 to 60 nm; rough beads had a surface roughness of approximately 240 to 350 nm. The...

Nanoscale particles embedded in a metallic matrix are of considerable interest as a route towards identifying and tailoring material properties. Al-Li alloys, which form ordered nanoscale precipitates of Al(3)Li for a range of concentrations, have been deployed successfully in the aerospace industry owing to their superior strength-to-weight ratio. The precipitates are metastable and their elec...