Characterization of the defects responsible for the precipitation of silver from dilute Pb-Ag solid solutions

Journal Article · Thu Dec 01 00:00:00 EST 1994 · Acta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-7151(94)90182-1· OSTI ID:6863414

Menaie, A ^[1]; Amenzou, H; Bernardini, J ^[2]; Moya, G ^[3]

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1. Ecole Normale Superieure Rabat (Morocco). Lab. de Physique des Materiaux
2. Faculte des Sciences St Jerome, Marseille (France). Lab. de Metallurgie
3. Ecole Normale Superieure Rabat (Morocco) Faculte des Sciences St Jerome, Marseille (France). Lab. de Physique des Materiaux

The diffusion coefficients of silver (D*) have been measured during its precipitation from dilute Pb-Ag solid solutions (92 [times] 10[sup [minus]6] at/at and 184 [times] 10[sup [minus]6] at/at) by using [sup 110]Ag radiotracer between 327 and 363 K. The diffusion activation energy Q[sub D*] = 49.4 kJ/mol is smaller than the diffusion activation energy (Q[sub D] = 60 kJ/mol) of silver in pure lead but is in fair agreement with the activation energy for precipitation of silver previously measured by the authors (E[sub a] = 50 kJ/mol). Evidence that the (Pb-Ag) pair is the defect responsible on the one hand for silver migration during the precipitation in these dilute alloys and on the other hand for silver diffusion in pure lead and lead-silver solid solutions is reviewed.

• OSTI ID: 6863414
• Journal Information: Acta Metallurgica et Materialia; (United States), Vol. 42:12; ISSN 0956-7151
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
LEAD ALLOYS
CRYSTAL DEFECTS
SILVER
PRECIPITATION
SILVER ALLOYS
ATOM TRANSPORT
EXPERIMENTAL DATA
SILVER 110
TRACER TECHNIQUES
ALLOYS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CRYSTAL STRUCTURE
DATA
DAYS LIVING RADIOISOTOPES
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTS
INFORMATION
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPE APPLICATIONS
ISOTOPES
METALS
NEUTRAL-PARTICLE TRANSPORT
NUCLEI
NUMERICAL DATA
ODD-ODD NUCLEI
RADIATION TRANSPORT
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
SEPARATION PROCESSES
SILVER ISOTOPES
TRANSITION ELEMENTS
360102* - Metals & Alloys- Structure & Phase Studies