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Titolo:
Recrystallization and grain growth of sintered aluminium powder alloys studied by using a nuclear non-destructive technique
Autore:
El Wahab, MA;
Indirizzi:
Ain Shams Univ, Dept Phys, Fac Girls, Cairo, Egypt Ain Shams Univ Cairo Egypt ams Univ, Dept Phys, Fac Girls, Cairo, Egypt
Titolo Testata:
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
fascicolo: 1-2, volume: 315, anno: 2001,
pagine: 240 - 244
SICI:
0921-5093(20010930)315:1-2<240:RAGGOS>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
POSITRON-ANNIHILATION; BOUNDARIES; RECOVERY; AL;
Keywords:
positron annihilation; SAP alloys; grain boundaries; lifetime parameters; trapping rate;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
15
Recensione:
Indirizzi per estratti:
Indirizzo: El Wahab, MA Ain Shams Univ, Dept Phys, Fac Girls, 1 Asmaa Fahmy St, Cairo, Egypt Ain Shams Univ 1 Asmaa Fahmy St Cairo Egypt t, Cairo, Egypt
Citazione:
M.A. El Wahab, "Recrystallization and grain growth of sintered aluminium powder alloys studied by using a nuclear non-destructive technique", MAT SCI E A, 315(1-2), 2001, pp. 240-244

Abstract

Positron lifetimes have been measured for cold rolled (similar to 90%) sintered aluminium powder (SAP) alloys with different amounts of Al2O3 contentand for similar samples annealed at temperatures ranging from 623 to 873 K(recrystallization region). The same measurements were performed on aluminium (99.5%) for comparison. In the present study, calculations of the average lifetime tau (av) and tau (bulk) and the trapping rate k were deduced from the lifetime parameters in the free and trapped states tau (1), tau (2) and their intensities I-1, I-2. The present lifetime parameters were used to explain the effect of amount of alumina on recrystallization and grain growth of SAP alloys. The trapping locations are suggested to be at grain boundaries since increasing of alumina increases the grain size and varies theinterparticle spacing. (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 25/11/20 alle ore 10:13:37