Page 132 - 摩擦学学报2025年第10期

第 10 期 SU Yongyao, et al.: Exploring the Impact and Mechanism of CrN Interlayer on the Tribological ··· 1529

(a)

O ZrO 2
200 μm
Intensity/a.u. Zr Intensity/a.u.

A B ZrO 2
Scanning direction

500 μm 0 100 200 300 400 500 0 200 400 600 800 1 000
Distance/μm Raman shift/cm −1

(b) Edge Edge

Fe 2 O 3
Fe
40 μm
Intensity/a.u. Cr Intensity/a.u. Cr 2 O 3

C D Al
Scanning direction
O
500 μm 0 50 100 150 200 250 0 200 400 600 800 1 000
Distance/μm Raman shift/cm −1
(c)
Edge Edge
Fe 2 O 3
Fe
40 μm
Intensity/a.u. Cr Intensity/a.u. Cr 2 O 3

E F Al
Scanning direction
O
500 μm 0 40 80 120 160 200 0 200 400 600 800 1 000
Distance/μm Raman shift/cm −1

Fig. 9 Morphology, composition distribution, and wear product (in air): (a) Zr-4; (b) FeCrAl; (c) FeCrAl/CrN
track. This might be attributed to the high hardness of water. As shown in Fig. 10(a), the friction coefficient of
FeCrAl/CrN, which made it challenging for the hard the samples ranged from 0.47 to 0.63, with the
oxide phases (such as Fe O and Cr O ) generated FeCrAl/CrN coating exhibited a minimum value of
2
3
3
2
during friction to embed into the coating, resulting in approximately 0.47. Fig. 10(b) presented the wear rates
their dispersion at the friction interface. Under the shear of the samples, showed that the coated samples have
stress of the friction pair, these phases cut the coating, lower wear rate compared to Zr-4 substrate. The
creating furrows. EDS line scans indicated an increase in FeCrAl/CrN displayed the lowest wear rate of
3
−7
oxygen content within the worn area, while the content approximately 6×10 mm /(N·m), which was two orders
3
−5
of other elements remains almost unaltered. Raman of magnitude lower than that of Zr-4 [7.7×10 mm /(N·m)]
spectroscopy further confirms the presence of Fe O and in B-Li water. This indicated that applyed FeCrAl
3
2
Cr O as the main oxides in the wear track. coating on the surface of Zr-4 effectively reduced the
2
3
Consequently, it could be inferred that the main wear wear loss in B-Li water, and the addition of the CrN
mechanism of the FeCrAl/CrN was abrasive wear and interlayer further enhanced the wear resistance of the
oxidation wear. FeCrAl coating. It should be noted that the wear rate of
Fig. 10 illustrated the friction coefficient and wear all three samples in B-Li water was lower than their
rate of FeCrAl, FeCrAl/CrN, and Zr-4 substrate in B-Li wear rate in air. Particularly, the wear rate of the