Open AccessTHE DIFFUSION THEORY OF OUTGASSING OF SOME NON-CRYSTAL MATERIALS IN VACUUM
Author(s) -
Gao Ben-Hui,
Xue Da-Tong
Publication year - 1980
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.29.93
Subject(s) - outgassing , lapping , diffusion , materials science , diffusion process , crystal (programming language) , thermodynamics , chemistry , physics , composite material , innovation diffusion , organic chemistry , computer science , programming language , knowledge management
In the early works of Dayton, Schram and Jaeckel, the hypothesis or the model of theory on the outgassing process of material in the Vacuum was given. So far, these conclusions have been accepted as the base for research on outgassing process.But it has already been found that the experimental results of outgassing rates of some non-crystal-line materials (for example, rubber, plastics etc.) are not in agreement with the above mentioned theories. In 1964, we suggested two theoretical models, i.e., "twofold over lapping diffusion" and "non-uniform concentration diffusion". We found that all the abnormal phenomena observed in the experiments can be thoroughly explained by these diffusion mechanisms.We have improved the method of experiment in outgassing rate measurement.