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Titolo:
Influence of Si, Ni and Co additions on gold alloy for investment cast process
Autore:
Gusmano, G; Montanari, R; Montesperelli, G; Tata, ME; Bemporad, E; Valente, M; Kaciulis, S; Mattogno, G;
Indirizzi:
Univ Ancona, Dipartimento Fis & Ingn Mat & Territorio, Ancona, Italy Univ Ancona Ancona Italy nto Fis & Ingn Mat & Territorio, Ancona, Italy Univ Roma Tor Vergata, Dipartimento Sci & Tecnol Chim, I-00173 Rome, ItalyUniv Roma Tor Vergata Rome Italy I-00173 ecnol Chim, I-00173 Rome, Italy Univ Roma Tor Vergata, Dipartimento Ingn Meccan, INFM, I-00173 Rome, ItalyUniv Roma Tor Vergata Rome Italy I-00173 ccan, INFM, I-00173 Rome, Italy Univ Roma 3, Dipartimento Ingn Meccan, Rome, Italy Univ Roma 3 Rome Italy iv Roma 3, Dipartimento Ingn Meccan, Rome, Italy Univ Rome La Sapienza, Dipartiment Ing CHim Mat Met & Mat Prime, I-00185 Rome, Italy Univ Rome La Sapienza Rome Italy I-00185 Mat Prime, I-00185 Rome, Italy CNR, Ist Chim Mat, I-00185 Rome, Italy CNR Rome Italy I-00185CNR, Ist Chim Mat, I-00185 Rome, Italy
Titolo Testata:
JOURNAL OF ALLOYS AND COMPOUNDS
fascicolo: 1-2, volume: 325, anno: 2001,
pagine: 252 - 258
SICI:
0925-8388(20010726)325:1-2<252:IOSNAC>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Keywords:
transition metal alloys; microstructure; mechanical properties;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
13
Recensione:
Indirizzi per estratti:
Indirizzo: Montesperelli, G Univ Ancona, Dipartimento Fis & Ingn Mat & Territorio, Ancona, Italy Univ Ancona Ancona Italy t & Territorio, Ancona, Italy
Citazione:
G. Gusmano et al., "Influence of Si, Ni and Co additions on gold alloy for investment cast process", J ALLOY COM, 325(1-2), 2001, pp. 252-258

Abstract

The aim of this paper is the study of the influence of addition of Si, Ni and Co on the microstructure and mechanical feature of Is-ct gold alloys, in order to reduce production rejects in the investment cast process. For this reason, a typical alloy containing Ag, Cu and Zn usually used for jewelry manufacturing, has been used to prepare four master alloys with variable concentrations of Si, Co and Ni; 18-ct gold alloys were also prepared. It has been demonstrated that the increasing of Si concentration induces embrittlement in gold alloys. XPS analysis on fractured samples revealed the presence of SiO2 at the grain boundaries of samples containing 0.25 wt.% of Si. The addition of Ni and Co permitted to obtain gold alloys with good mechanical properties and surface finishing. It has been also demonstrated that Ni and Co form insoluble intermetallic compounds with Si that decrease SiO2 content at the grain boundaries thus preventing embrittlement. XRD analysispermitted to identify the compounds as Ni3Si and Co2Si. (C) 2001 Elsevier Science B.V. All rights reserved.

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Documento generato il 19/09/20 alle ore 09:07:30