Point defect characterization in CoAl using positron annihilation
Conference
·
OSTI ID:20001656
Vacancy-like defects in CoAl in the composition range 48.5 at.% {lt} C{sub Co} {lt} 53 at.% are investigated by means of positron lifetime spectroscopy and Doppler-broadening measurements. The observed lifetimes in the annealed samples confirm that defects are quenched-in during the production of the samples. The values of the positron lifetime and the S-parameter decrease with increasing Co concentration. After quenching from 1,400 C or 1,600 C an increase in the positron parameters is observed. Long-time annealing of the Co-rich sample shows a dramatic decrease of the positron lifetime to the expected bulk lifetime.
- Research Organization:
- Technische Univ. Graz (AT)
- Sponsoring Organization:
- Fonds zur Foerderung der Wissenschaftlichen Forschung of Austria
- OSTI ID:
- 20001656
- Report Number(s):
- CONF-981104--; ISBN 1-55899-458-0; ISSN 1067-9995
- Country of Publication:
- United States
- Language:
- English
Similar Records
An investigation of point defects in NiAl using positron annihilation techniques
An investigation of vacancy-like defects in stoichiometric NiAl by means of positron annihilation measurements
Positron annihilation study on hafnium metals given various treatments
Conference
·
Thu Jul 01 00:00:00 EDT 1999
·
OSTI ID:20001640
An investigation of vacancy-like defects in stoichiometric NiAl by means of positron annihilation measurements
Journal Article
·
Thu Dec 10 23:00:00 EST 1998
· Acta Materialia
·
OSTI ID:328271
Positron annihilation study on hafnium metals given various treatments
Journal Article
·
Sun Aug 01 00:00:00 EDT 1993
· Scripta Metallurgica et Materialia; (United States)
·
OSTI ID:6354102