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Titolo:
Effects of O-2 gas on the size and structure of Cr clusters formed by plasma-gas-condensation
Autore:
Hihara, T; Peng, DL; Sumiyama, K;
Indirizzi:
Nagoya Inst Technol, Dept Mat Sci & Engn, Showa Ku, Nagoya, Aichi 4668555,Japan Nagoya Inst Technol Nagoya Aichi Japan 4668555 agoya, Aichi 4668555,Japan
Titolo Testata:
MATERIALS TRANSACTIONS
fascicolo: 8, volume: 42, anno: 2001,
pagine: 1480 - 1484
SICI:
1345-9678(200108)42:8<1480:EOOGOT>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
ULTRAFINE METAL PARTICLES; THIN-FILMS; MAGIC NUMBERS; DEPOSITION; NB; FE; IMPACT; TA;
Keywords:
A15-type structure; bcc structure; Chromium cluster; plasma-gas-condensation; time-of-flight mass spectrometer;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
29
Recensione:
Indirizzi per estratti:
Indirizzo: Hihara, T Nagoya Inst Technol, Dept Mat Sci & Engn, Showa Ku, Nagoya, Aichi 4668555,Japan Nagoya Inst Technol Nagoya Aichi Japan 4668555 hi 4668555,Japan
Citazione:
T. Hihara et al., "Effects of O-2 gas on the size and structure of Cr clusters formed by plasma-gas-condensation", MATER TRANS, 42(8), 2001, pp. 1480-1484

Abstract

Cr clusters have been produced by a plasma-gas-condensation type cluster deposition apparatus, and studied using a time-of-flight mass spectrometer and a transmission electron microscope. The Cr clusters formed in high pressure inert (Ar and/or lie) gas atmosphere are of an A15-type structure. Whenan O-2. Ps is mixed with the inert gases in the source (sputtering) chamber, a bcc phase is formed together with Cr2O3. The O-2 gas introduction leads to an increase in the gas temperature of the source chamber probably due to release of the formation enthalpy of the oxide. The A15 phase is annealed by such excess heat and becomes the equilibrium bee phase. The sizes of bee clusters are smaller than those of the A15-clusters, probably due to theheterogeneous nucleation promoted by the oxide formation.

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Documento generato il 15/07/20 alle ore 08:33:12