Open AccessPOSITRON ANNIHILATION STUDY ON THE INTERACTION BETWEEN HYDROGEN ATOMS AND DEFECTS IN COLD-ROLLED NICKEL
Author(s) -
Yunhai Wu,
Tian Zhongzhuo,
Chang Xiangrong,
Jijun Xiao
Publication year - 1991
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.40.1883
Subject(s) - vacancy defect , nickel , hydrogen , materials science , dislocation , positron annihilation , atomic physics , economies of agglomeration , cluster (spacecraft) , molecular physics , condensed matter physics , metallurgy , positron , chemistry , physics , nuclear physics , composite material , electron , organic chemistry , economic growth , computer science , economics , programming language
The interaction between hydrogen atoms with defects in coldrolled nickel is investigated by Doppler broadening measurement. Experimental results show that the S-parameter in cold-rolled-hydrogen-charged nickel increases as compared with that of hydrogen-free cold-rolled nickel. And the increament of S-parameter depends on vacancy concentration, being almost independent of dislocation density. It is suggested that hydrogen atoms can act as centers of vacancy agglomeration, leading to the formation of vacancy cluster.