Page 133 - 摩擦学学报2025年第10期

1530 摩擦学学报（中英文） 第 45 卷

FeCrAl/CrN coating in B-Li water was less than one- curves revealing comparable wear depths of 0.67 µm
3
−6
fifth of its wear rate [3.2×10 mm /(N·m)] in air. This and 0.66 µm, respectively, as illustrated in Fig. 11(b)
was likely due to the formation of a liquid film at the and 11(c). These findings visually highlighted the
friction pair and specimen interface in the B-Li water, efficacy of applying the FeCrAl coating on the surface
which partially dissociates contact between the friction of Zr-4 in reduced wear loss in B-Li water.
pair and sample, thus effectively reducing the wear rate The morphology and composition of the wear
[35]
of the samples . tracks were shown in Fig. 12. For the Zr-4 substrate,
Fig. 11 presented the 3D topography, optical irregular blocky worn products adhered to the bottom of
microscopy morphology, and cross-sectional profile of the wear track, exhibiting clear scratch marks (inset), as
the wear scars for FeCrAl, FeCrAl/CrN and Zr-4 depicted in Fig. 12(a). The EDS line scan results
substrate in B-Li water. In Fig. 11(a), black debris was indicated an increase in O content in the wear area,
observed scattered in the wear track of Zr-4, with a while Raman spectroscopy indicated that the main
cross-sectional profile indicated a significant wear depth component of the wear debris was ZrO . The wear
2
of up to 16.8 µm. While, the wear of FeCrAl and mechanisms between Zr-4 and ZrO mainly were
2
FeCrAl/CrN was not severe, with cross-sectional profile adhesion wear and oxidation wear. For FeCrAl, similar

1.0 80

(a) (b)
0.8 75
Friction coeffiicient 0.6 Wear rate/[10 −6 mm 3 /(N·m)] 70

0.4

0.2 5

0.0 0
Zr-4 FeCrAl FeCrAl/CrN Zr-4 FeCrAl FeCrAl/CrN
Fig. 10 Friction coefficient and wear rate of FeCrAl, FeCrAl/CrN, and Zr-4 substrate in B-Li water:
(a) friction coefficient; (b) wear rate

z/μm z/μm z/μm
(a) 2.95 (b) 1.88 (c) 4.01

−31.83 −11.99 −7.49

2.524
1.893 1.893 1.893 2.524 1.893 2.524
1.420 1.420 1.893 1.420 1.893
0.947 1.262 y/mm 0.947 1.262 0.947 1.262 y/mm
x/mm
0.473 0.631 x/mm 0.473 0.631 y/mm x/mm 0.473 0.631
0 0
(a1) (b1) 0 0 (c1) 0 0

16.8 μm
0.67 μm 0.66 μm
200 μm 200 μm 200 μm

Fig. 11 Optical microscope morphology and cross-section profile of wear tracks in B-Li water:
(a) Zr-4; (b) FeCrAl; (c) FeCrAl/CrN