Positron-annihilation studies of a superplastic Al-Ca-Zn alloy
- 1 January 1986
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine A
- Vol. 53 (1) , 123-129
- https://doi.org/10.1080/01418618608242812
Abstract
The Al‒(5 wt%)Ca‒(5 wt%)Zn alloy has been studied by positron annihilation and transmission electron microscopy. Positron trapping has been observed in specimens of Al‒(5 wt%)Ca‒(5 wt%)Zn from lifetime and Doppler-broadening measurements. The trapping has been attributed to incoherent matrix-precipitate interfaces and to grain boundaries. The results can only be interpreted if the grain boundary contains more than one kind of trap for positrons. This hypothesis is in agreement with the present knowledge of the grain boundary structure.Keywords
This publication has 15 references indexed in Scilit:
- A Positron study of iron alloysPhysica Status Solidi (a), 1984
- A positron study of a fine-grained Zn-Al-Mg alloySolid State Communications, 1984
- Positron trapping in the alloy Fe-1.25 wt% CPhysica Status Solidi (a), 1983
- A new superplastic aluminum sheet alloyMaterials Science and Engineering, 1980
- A study of precipitate formation in aluminium-copper alloys by positron annihilation and transmission electron microscopyPhilosophical Magazine A, 1980
- Positron diffusion in metals and trapping at grain boundariesPhilosophical Magazine A, 1980
- Annihilation gamma-ray lineshape parametersApplied Physics A, 1977
- A new method of investigating recrystallization on the basis of positron annihilationPhysics Letters A, 1976
- Positron diffusion in metalsSolid State Communications, 1974
- Positron lifetimes and trapping probabilities observed separately for vacancies and dislocations in aluminiumJournal of Physics F: Metal Physics, 1972