Študij notranje oksidacije v naogljičenih hitrostrjenih trakovih Cu

Rebeka Rudolf (Author), Ladislav Kosec (Author), Ivan Anžel (Author), Leo Gusel (Author), Mojmir Poharc (Author)

Abstract

In this paper we present a composite with fine dispersion of nano-sized bubbles, which can be formed by internal oxidation of fine dispersed graphite particles. For this purpose the initial pure Cu ribbons were internally carbonised to obtain very fine, some 100 nm-sized graphite particles homogeneously distributed in the Cu matrix. By the internal oxidation process the reaction of dissolved oxygen with graphite yields the gas products (CO, CO2) which cannot be dissolved in the crystal lattice of the metal. The gas products are meshed in the space previously occupied by graphite and they have a greater specific volume than the solid graphite, thus establishing the compressive stresses in the metalic matrix and consequently causing the strengthening offect. On the other hand, such stress fields can react with sliding dislocation, whereby they impede the dislocation motion and consequently we would expect that the composite mechanical properties would be improved.

Keywords

metalurgija;kompoziti;notranja oksidacija;grafit;bakrovi trakovi;mikrostruktura;

Data

Language:	Slovenian
Year of publishing:	2007
Typology:	1.01 - Original Scientific Article
Organization:	UM FS - Faculty of Mechanical Engineering
Publisher:	Inštitut za kovinske materiale in tehnologije Ljubljana
UDC:	669.3:66.094.3:620.18
COBISS:	11119894
ISSN:	1580-2949
Parent publication:	Materiali in tehnologije
Views:	557
Downloads:	67
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	ǂThe ǂstudy of the internal oxidation in internally carbonised Cu ribbons
Secondary abstract:	In this paper we present the composite with the fine dispersion of nano-sized bubbles, which can be formed by the internal oxidation of fine dispersed graphite particles. For this purpose the initial pure Cu ribbons were internally carbonised to obtain very fine some 100 nm sized graphite particles homogeneously distributed in the Cu matrix. By the internal oxidation process the reaction of dissolved oxygen with graphite yields the gas products (CO, CO2), which cannot be dissolved in crystal lattice of the metal. The gas products are meshed in the space previously occupied by graphite and they have a greater specific volume than solid graphite, thus establishing the compressive stresses in the metallic matrix and consequently causing the strengthening effect. On the other hand, such stress field can react with sliding dislocation, whereby they impede the dislocation motion and consequently it would expect that the composite mechanical properties would be improved.
Secondary keywords:	metallurgy;composites;internal oxidation;graphite;copper ribbons;microstructure;
URN:	URN:NBN:SI
Type (COBISS):	Scientific work
Pages:	str. 53-58
Volume:	ǂLetn. ǂ41
Issue:	ǂšt. ǂ1
Chronology:	2007
ID:	1739027