Characterization and Comparison of Rapidly Solidified Al Particles Mechanically Milled Nanostructures and their Consolidated Structures Made by High Energy Rate Forming (HERF) Technique

Abstract

The aim of the present work is to produce new types of solid nanomaterials for different purposes (coatings, fillers, foams, bulk pieces, etc.). Technologies such as RS Al flake production, high energy mechanical milling and high energy rate forming technology (HERF) for compacting are used. The products are analyzed mainly by XRD, SEM and TEM methods. It was shown that the new-type of RS Al “flake” material is suitable not only for pigments but also for powder metallurgical purposes, i.e. Al based nanocomposites. By choosing suitable parameters for mechanical alloying with the Fritsch Planetary mill 4, very fine, alloyed and composited nanostructures can be produced (Al-4.5w%Cu- 10w%Al2O3, Al-15w%Pb) Dynamic compaction (HERF) using explosive techniques seems to offer a good way for the compaction of Al (metal) matrix nanostructured composites.

Nano-Mechanical and Surface Morphological Properties of TiN Coating Produced by PVD on Tool Steel

“…Nanoindentation is an art of hardness test with an extremely low penetration of the indenter tip into the sample surface. This later characteristics is used in nano-mechnaical investigations of thin hard coatings [9] and nanostructured materials [10], nevertheless some intrinsic systematic error sources raise difficulties in the application of the method [11]. The nanoindentation tests were carried out using a fully calibrated Hysitron Triboindenter equipped wit a 2D transducer and a standard Berkovich indenter tip.…”