Cavitation-erosion resistance of aluminum oxide and silicon carbide.

Circumstellar aluminum oxide and silicon carbide in interplanetary dust particles

A systematic NanoSIMS isotope imaging study of sub-micrometer phases in interplanetary dust particles (IDPs) has led to the discovery of two presolar grain types that previously were observed only in primitive meteorites. A 350 · 600 nm Al2O3 grain has a large O enrichment and a slight O depletion, as well as a Mg excess due to the decay of extinct Al. Because of its relatively large size and p...

Functionalized silicon nanoparticles from reactive cavitation erosion of silicon wafers.

A new sonochemical process for the top-down production of silicon nanoparticles (<1 nm) with surface functional groups is described. The procedure involves a combination of acoustic cavitation erosion of a single-crystalline silicon surface coupled with simultaneous reaction with a reactive organic compound such as 1-hexyne. The sonochemical formation of the photoluminescent silicon nanoparticl...

Effect of Porosity on Cavitation Erosion Resistance of HVOF Processed Tungsten Carbide Coatings

The phenomenon of cavitation is widely experienced in both pumps and under-water components of hydro power plants. The mechanism of material damage during cavitation is mainly attributed to implosion of high velocity bubbles on to the surface giving raise to local increase in stresses in excess of 1.4 GPa. In addition, material wastage due to particle induced erosion is observed in hydro plants...

Experimental study of fracture mechanics in the aluminum matrix composites containing Fifteen percent silicon carbide particles

In this investigation ‚the fracture toughness of A356 containing15%SiC composite was studied. Al/SiC composites have been considered because of their mechanical and erosion properties .Low fracture toughness in Al/SiC as compared with Aluminium alloys is one of its disadvantage. In this study at first A356 alloy was melted in a smelting electrical furnace then poured into the mould. A356-15% Si...

Tailoring Oxide/Silicon Carbide Interfaces: NO Annealing and Beyond