Forming nanostructured hypereutectic aluminum via high-velocity oxyfuel spray deposition

Abstract

Al-Si alloys are widely used in aerospace and automobile industries due to their high strength-to-weight ratio and superior wear and corrosion resistance. Increasing the percentage of silicon in these alloys improves their wear resistance and strength considerably, but impairs their ductility. This problem can be overcome by refi ning the microstructure of hypereutectic alloys by varying the processing conditions. High velocity oxyfuel (HVOF) spray deposition is an effi cient process to deposit nanostructured Al-Si coatings and near-net-shape spray-formed structures. This article deals with the microstructural evolution in an Al21wt.% Si alloy processed through HVOF spraying.

Computer-Controlled Detonation Spraying: Flexible Control of the Coating Chemistry and Microstructure

“…Nano-sized features of thermally sprayed coatings may be either inherited from the nanostructured powder agglomerates or form as a result of rapid cooling of molten particles upon deposition [35][36][37][38]. In a composite material, the formation of nanostructures may occur in parallel to chemical reactions.…”

The commercialization of nanomaterials: Today and tomorrow

“…[17][18][19] Typically, solid-state involving the addition of particles to reduce the density of polymeric materials, prevent corrosion of metallic substrates, or enhance/ modify surface and structural properties are fruitful areas for development. • The addition of nanoscale constituents to polymer fi lms has been found to produce novel properties.…”

Plasma And Cold Sprayed Aluminum Carbon Nanotube Composites: Quantification Of Nanotube Distribution And Multi-Scale Mechanical Properties

“…On the other hand, it could also lead to total conversion of the CNTs and deterioration of mechanical properties of the CNT [36,37]. Several other processes like mechanical milling [22,28], HVOF [32,38] and equal channel angular pressing [39][40][41] could result in mechanical damage of the CNT structure. So it is necessary to assess processes based on the damage/changes they introduce in the CNTs.…”