Biomedical Engineering Reference
In-Depth Information
0.20
Remineralized
Eroded
Original
0.15
0.10
0.05
0.00
0
10
20
30
40
Normal load/mN
Fig. 4.34
Variation in the mean friction coeffi cient with normal load [
63
]
0.20
Remineralized
Eroded
Original
0.15
0.10
0.05
0.00
0.00
0.05
0.10
0.15
0.20
Displacement/mm
Fig. 4.35
Variation in the friction coeffi cient with displacement at the normal load of 20 mN [
63
]
increased with the normal load for the three surfaces. The friction coeffi cient of the
eroded surface was higher than that of the original surface, and it increased a little
after 12 h of remineralization. Both the eroded and the remineralized surfaces
showed a bigger fl uctuation in the coeffi cient of friction compared to the original
surface.
Typical nanoscratch profi les at different normal loads are shown in Figs.
4.36
,
and
4.37
gives the wear volume on the original, eroded, and remineralized surfaces.
The wear volume was found to be much higher on the eroded surface than on the
original surface. The wear -resistance of the eroded surface was enhanced to some
extent after 12 h of remineralization. Under the same loading level, the wear volume
on the remineralized surface was signifi cantly lower than that on the eroded surface,
but it was still higher than that on the original surface.
