Sintering of copper, nickel and tungsten studied by positron lifetime spectroscopy

T. Staab, C. Hubner, R. Krause Rehberg, H. S. Leipner, W. Zeiger, B. Vetter

Abstract

Dislocations and vacancy clusters are produced by pressing and recover during sintering. We find that the main decrease of defects is happening at the time when the intensive shrinkage stage begins. Hence sintering could possibly happen as a defect induced diffusion process. Considering powders of different particle sizes we find that with decreasing particle size there is an increasing part of positrons annihilating at surface states. We confirmed this by a Monte Carlo simulation of the positron diffusion.
Original languageEnglish
JournalMaterials Science Forum
Volume175
Issue number178
Pages (from-to)541-544
Number of pages4
ISSN0255-5476
DOIs
Publication statusPublished - 01.11.1994

Fingerprint

Dive into the research topics of 'Sintering of copper, nickel and tungsten studied by positron lifetime spectroscopy'. Together they form a unique fingerprint.

Cite this