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Titolo:
Synthesis and characterization of a TiAl/Ti5Si3 composite with a submicrocrystalline structure
Autore:
Senkov, ON; Cavusoglu, M; Froes, FH;
Indirizzi:
Univ Idaho, Inst Mat & Adv Proc, Moscow, ID 83844 USA Univ Idaho Moscow ID USA 83844 Inst Mat & Adv Proc, Moscow, ID 83844 USA
Titolo Testata:
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
fascicolo: 1-2, volume: 300, anno: 2001,
pagine: 85 - 93
SICI:
0921-5093(20010228)300:1-2<85:SACOAT>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
GRAIN-SIZE; NANOCRYSTALLINE MATERIALS; ALLOYS; DUCTILITY; AMORPHIZATION; TEMPERATURE; STABILITY; GROWTH; SYSTEM; TI;
Keywords:
mechanical alloying; hot isostatic pressing; annealing; analytical electron microscopy differential thermal analysis; hardness testing; titanium aluminide; titanium silicide; composite;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
36
Recensione:
Indirizzi per estratti:
Indirizzo: Senkov, ON Universal Energy Syst Inc, 4401 Dayton Xenia Rd, Dayton, OH 45432 USA Universal Energy Syst Inc 4401 Dayton Xenia Rd Dayton OH USA 45432
Citazione:
O.N. Senkov et al., "Synthesis and characterization of a TiAl/Ti5Si3 composite with a submicrocrystalline structure", MAT SCI E A, 300(1-2), 2001, pp. 85-93

Abstract

A Ti-47Al-3Cr/Ti5Si3 composite with a submicrocrystalline structure was produced by mechanical alloying (MA) and hot isostatic pressing (HIP). Blendsof elemental and pre-alloyed powders were used for the MA, Intimate mixingof the elements and powder amorphization occurred during MA. HIP of the MApowder resulted in a fully dense material with a submicron grain size and a homogeneously distributed mixture of gamma-TiAl and Ti5Si3 grains. The average grain size increased from 140 to 540 nm when the HIP temperature was increased from 850 to 1050 degreesC. Grain growth in the composite in the temperature range 850-1100 degreesC was described by the equation D-4 - D-o(4) = K-o exp(- Q/RT)t where Q = 330 kJ mol(-1) and K-o = 3.0 x 10(-18) m(4)s(-1). The kinetic behavior was similar to that for a nanocrystalline Ti-47Al-3Cr alloy annealed in the same temperature range, i.e. the Ti5Si3 phasehad little effect on grain growth. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/09/20 alle ore 12:03:37