Скачать или смотреть In-situ synthesis via laser metal deposition of a lean Copper nanocomposite

This movie clip reports about our recent paper on the in-situ synthesis, via laser metal deposition, of a lean Copper Chromium Niobium conductive alloy, which is hardened by Chromium nano-scale precipitates, and by Laves phase micro-particles.
Electrically conductive, yet mechanically strong copper alloys, are essential materials in highly mechanically loaded electrical devices.
We demonstrate a novel in-situ synthesis approach, via laser metal deposition, in a compositionally lean copper alloy with only 3.4 percent Chromium and only 0.6 percent Niobium.
The Mechanical Strength of this chemically lean alloy, comes from chromium nano-scale precipitates, formed in-situ with only 4 nanometer diameter, and from Laves phase particles , with a size below 1 micron, homogeneously dispersed across the microstructure.
This dual phase dispersion, in a nearly pure copper matrix, is achieved through a suited combination of chromium alloying and cooling rate, during laser metal deposition synthesis.
The as-synthesized alloy has a conductivity of 68% of the electrical conductivity of pure Copper and a Vickers hardness of 146, at room temperature.

Original publication: https://www.sciencedirect.com/science...


© Dierk Raabe