Študij notranje oksidacije v naogljičenih hitrostrjenih trakovih Cu

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

Povzetek

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.

Ključne besede

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

Podatki

Jezik:	Slovenski jezik
Leto izida:	2007
Tipologija:	1.01 - Izvirni znanstveni članek
Organizacija:	UM FS - Fakulteta za strojništvo
Založnik:	Inštitut za kovinske materiale in tehnologije Ljubljana
UDK:	669.3:66.094.3:620.18
COBISS:	11119894
ISSN:	1580-2949
Matična publikacija:	Materiali in tehnologije
Št. ogledov:	557
Št. prenosov:	67
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarni jezik:	Angleški jezik
Sekundarni naslov:	ǂThe ǂstudy of the internal oxidation in internally carbonised Cu ribbons
Sekundarni povzetek:	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.
Sekundarne ključne besede:	metallurgy;composites;internal oxidation;graphite;copper ribbons;microstructure;
URN:	URN:NBN:SI
Vrsta dela (COBISS):	Znanstveno delo
Strani:	str. 53-58
Letnik:	ǂLetn. ǂ41
Zvezek:	ǂšt. ǂ1
Čas izdaje:	2007
ID:	1739027