Present paper reports an overview on the processing, corrosion behavior and applications of various metal matrix composites with a special focus on iron based metal matrix nanocomposites. As iron has a much higher melting temperature compared to aluminum, copper and magnesium therefore it is synthesized using powder metallurgy technique. P/M technique is widely used because it provides microstr...

A spark plasma sintering (SPS) apparatus was used for the first time as an analytical testing tool for studying creep in ceramics at elevated temperatures. Compression creep experiments on a fine-grained (250 nm) polycrystalline magnesium aluminate spinel were successfully performed in the 1100-1200 °C temperature range, under an applied stress of 120-200 MPa. It was found that the stress expon...

The objective of this paper is to investigate the use calcium aluminate cements as alternative within context nuclear waste stabilization by solidification. Using an external 60Co source, effect γ-radiation on H2 gas production one cement-based materials (cement “Ciment Fondu”) and its stable hydrates, was studied. amount produced these cement pastes found be much lower (up five times less) tha...

The synthesis of three-dimensional (3-D) assemblies of zirconia nanocrystals via the shape-preserving reactive conversion of biologically reproducible, silica-based microtemplates (diatom microshells) is demonstrated for the first time. Silica diatom microshells were first converted into magnesia replicas via an oxidation–reduction displacement reaction with magnesium gas. The magnesia replicas...

MgAl and MgAl/ZnO coatings were prepared by plasma electrolytic oxidation (PEO) of AZ31 magnesium alloy in aluminate electrolyte (5 g/L NaAlO2) without with addition ZnO particles various concentrations. The coating was partially crystallized contained MgO MgAl2O4 phases. to had no significant effect on the surface morphology formed coatings, while Zn content increased particle X-ray diffractio...

The Holocene Wolfenden tufa deposit in south-eastern British Columbia, western Canada, preserves a unique record of the earliest stages calcium carbonate deposition resulting from microbial extracellular polymeric substances-mediated precipitation amorphous (ACC) with partial transformation to monohydrocalcite (MHC) and subsequently nanocrystalline calcite. This is first documentation mineralog...