Page 71 - 《摩擦学学报》2021年第2期

216 摩 擦 学 学 报 第 41 卷

8
4 2 50 N 4 2 50 N 6 4 50 N
Tangential force/N −2 Tangential force/N −2 Tangential force/N −2
2
0
0
0
−4
−6
−4
−8
−6 −4 −10
−6
0 100 0 100 0 100
10 000 0 10 000 0 10 000 0
amplitude/μm
amplitude/μm
amplitude/μm
20 000 −100 Displacement 20 000 −100 Displacement 20 000 −100 Displacement
30 000 Number of cycles 30 000 Number of cycles 30 000
Number of cycles
(a) 50 N/25 μm (b) 50 N/50 μm (c) 50 N/100 μm
2 2 2 20 N
20 N 1 20 N 1
Tangential force/N −1 Tangential force/N −1 Tangential force/N −1
1
0
0
0
−2
0 100 −2 0 100 −2 0 100
10 000 0 10 000 0 10 000 0
amplitude/μm
amplitude/μm
amplitude/μm
20 000 −100 Displacement 20 000 −100 Displacement 20 000 −100 Displacement
30 000 Number of cycles 30 000 Number of cycles 30 000
Number of cycles
(d) 20 N/25 μm (e) 20 N/50 μm (f) 20 N/100 μm

0.6 10 N 0.6 10 N 0.6 10 N
Tangential force/N −0.2 Tangential force/N −0.2 Tangential force/N −0.2
0.4
0.4
0.4
0.2
0.2
0.2
0.0
0.0
0.0
−0.4
−0.6
−0.6
−0.6 −0.4 −0.4
0 100 0 100 0 100
10 000 0 10 000 0 10 000 0
amplitude/μm
amplitude/μm
amplitude/μm
20 000 −100 Displacement 20 000 −100 Displacement 20 000 −100 Displacement
30 000 Number of cycles 30 000 Number of cycles 30 000
Number of cycles
(g) 10 N/25 μm (h) 10 N/50 μm (i) 10 N/100 μm
0.6 0.6 0.6
5 N 0.4 5 N 0.4 5 N
Tangential force/N −0.2 Tangential force/N −0.2 Tangential force/N −0.2
0.4
0.2
0.2
0.2
0.0
0.0
0.0
−0.4
−0.6
−0.6 −0.4 −0.4
−0.6
0 100 0 100 0 100
10 000 0 10 000 0 10 000 0
amplitude/μm
amplitude/μm
amplitude/μm
20 000 −100 Displacement 20 000 −100 Displacement 20 000 −100 Displacement
30 000 Number of cycles 30 000 Number of cycles 30 000
Number of cycles
(j) 5 N/25 μm (k) 5 N/50 μm (l) 5 N/100 μm

Fig. 2 Fretting loops(F t -D-N) of DLC film at different load and displacement amplitude
图 2 DLC薄膜在不同载荷及位移幅值条件下的F t -D-N曲线