In-situ monitoring of internal oxidation of dillute alloys

Mihael Brunčko (Avtor), Ivan Anžel (Avtor), Albert C. Kneissl (Avtor)

Povzetek

This paper presents a non-destructive measurement method that enables identification and characterization of phenomena during internal oxidation of metallic materials as well as monitoring the kinetics of internal oxidation using "in-situ" electrical resistance measurements. A special laboratory device, based on the unique measurement cell, for the electrical resistance measurements at high temperatures and the model for electrical resistance transformation into an instantaneous microstructure were developed. To accomplish this, the process of internal oxidation was divided into the sequence of the key partial reactions that were presented in the model as the parallel andžor serial connected time variable resistors in the electrical circuit. The validity of the transformation model was experimentally confirmedby internal oxidation of Ag-Sn (2 at.% Sn) alloy at different oxidation temperatures in air atmosphere. The comparison of the results obtained by "in-situ" electrical resistance measurements with those obtained by metallographic analysis and Wagnerćs theory shows that the novel method presents a more effective tool for monitoring of internal oxidation kinetics. The method identifies also the microstructural defects and their influences onthe kinetics of internal oxidation.

Ključne besede

metalurgija;zlitina Ag-Sn;notranja oksidacija;električna upornost;metallurgy;Ag-Sn alloy;internal oxidation;electrical resistance;

Podatki

Jezik:	Angleški jezik
Leto izida:	2007
Tipologija:	1.01 - Izvirni znanstveni članek
Organizacija:	UM FS - Fakulteta za strojništvo
UDK:	669
COBISS:	10702870
ISSN:	0010-938X
Št. ogledov:	1242
Št. prenosov:	32
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarni jezik:	Angleški jezik
Sekundarne ključne besede:	metalurgija;zlitina Ag-Sn;notranja oksidacija;električna upornost;
URN:	URN:SI:UM:
Strani:	str.1228-1244
Letnik:	ǂVol. ǂ49
Zvezek:	ǂiss. ǂ3
Čas izdaje:	Mar. 2007
ID:	8718624