Biomedical Engineering Reference
In-Depth Information
a
b
Ca
Ca
P
P
C
O
C
O
Ca
Ca
Ti
0.0
1.0
2.0
3.0
4.0
5.0
6.0
0.0
1.0
2.0
3.0
4.0
5.0
6.0
Energy/keV
Energy/keV
c
d
Ca
Ca
P
P
O
Ti
Ca
Ca
C
O
Ti
C
V
V
0.0
1.0
2.0
3.0
4.0
5.0
6.0
0.0
1.0
2.0
3.0
4.0
5.0
6.0
Energy/keV
Energy/keV
Fig. 3.12
EDX spectra of wear particles on enamel surfaces subjected to different cycles [
35
]: (
a
)
original surface; (
b
) 1,000 cycles; (
c
) 2,000 cycles; (
d
) 5,000 cycles
a
b
20
100 cycles
15
1 000 cycles
10
2 000 cycles
5
5 000 cycles
0
0
2 000
4 000
6 000
10 µm
Number of cycles
1 mm
Variation of wear depth as function
of number of cycles
Profile
Fig. 3.13
Profi le and depth of wear scars on the surfaces of enamel [
35
]
The area of wear scar on the enamel surface increased with the number of cycles.
After 1,000 cycles, the width of the wear scar obviously exceeded the Hertzian
contact diameter, and there were obvious ploughing as well as some delamination
pits on the worn surface of enamel (Fig.
3.10c
). The uneven worn surface resulted
from some rugged components in the profi les (Fig.
3.13a
). Generally, for brittle
