Production of nanotwinned copper via cryogenic milling
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hdl:2099.1/17350
Tipus de documentProjecte Final de Màster Oficial
Data2012-09
Condicions d'accésAccés obert
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Reconeixement-NoComercial-SenseObraDerivada 3.0 Espanya
Abstract
Nanostructured copper powder was synthesized using high velocity cryomilling in order to
induce deformation twinning and deformation twins in the refined microstructure. The
powder was cold compacted and the Vickers hardness determined. A characterization of the
powder evolution with increasing milling time was done using scanning electron
microscopy and its microstructure was analysed with electron backscatter diffraction
(EBSD) and transmission electron microscopy (TEM). The mean hardness for low milling
times was around 140 HV and for high milling times around 170 HV. In this final state, the
microstructure was not homogeneous and showed three different grain-types:
Nanostructured or ultrafine grains around 100-500 nm with nanosized twins, nanosized
grains smaller than 50 nm and large equiaxed grains of 1 μm of diameter. The mean twin
spacing in the nanotwinned grains was around 15 nm.
MatèriesCopper -- Microstructure, Low temperature engineering, Nanostructures, Coure -- Microestructura, Temperatures baixes -- Enginyeria, Nanoestructures
ProvinençaAquest document conté originàriament altre material i/o programari no inclòs en aquest lloc web
TitulacióMÀSTER UNIVERSITARI ERASMUS MUNDUS EN CIÈNCIA I ENGINYERIA DE MATERIALS AVANÇATS (Pla 2014)
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Masterthesis_Guenther_Andreas_Kraemer.pdf | Report | 42,91Mb | Visualitza/Obre |