Author/Authors :
J. N. Wei، نويسنده , , T. C. Huang، نويسنده , , L. Zhao، نويسنده , , J. M. Yu، نويسنده , , W. J. Xie، نويسنده , , G. M. Li، نويسنده ,
Abstract :
The effects of temperature on the damping
behavior of bulk graphite were investigated and some
novel phenomena were observed. The internal friction (IF)
background of the bulk graphite has small temperature
dependent and the IF value is much smaller than that of
reported data. Moreover, two IF peaks were found in the
IF-temperature spectrums. The first is proved to originate
from the sweeping motion of in-plane dislocations and is a
relaxation-type IF peak. The average activation energy of
the peak is around 1.10 ± 0.06 eV and the pre-exponential
factor s0 is 10-14 s. The second is a transformation peak,
resulting from the transformation of asphalt that was used
as binder in preparation of bulk graphite.
