Page 134 - 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 ··· 1531

(a) Edge Edge

ZrO 2
30 μm Zr
Intensity/a.u. Intensity/a.u.

E F ZrO 2
Scanning direction
O

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

(b) Edge Edge
Fe
Fe 2 O 3
30 μm
Intensity/a.u. Cr Intensity/a.u.

C D Al
Scanning direction O

100 μm 0 20 40 60 80 100 0 200 400 600 800 1 000
Distance/μm Raman shift/cm −1

(c) Edge Edge
Fe 2 O 3
30 μm Fe
Intensity/a.u. Intensity/a.u. Cr 2 O 3 ·nH 2 O

A B Cr
Al
Scanning direction
O
100 μm 0 25 50 75 100 0 200 400 600 800 1 000
Distance/μm Raman shift/cm −1

Fig. 12 Morphology, composition distribution, and wear products in B-Li water: (a) Zr-4; (b) FeCrAl; (c) FeCrAl/CrN
to testing in air, the internal morphology of the wear Raman spectroscopy results indicated that Fe O and
3
2
track varied across different regions. The edge of the Cr O ·nH O were the primary oxides in the wear
2
3
2
[34]
wear track was smoother, while the middle area was track . It could be concluded that the wear mechanism
covered by flaky wear debris, as shown in Fig. 12(b). of the FeCrAl/CrN mainly include abrasion wear and
The EDS line scan results revealed a sudden increase of oxidation wear.
oxygen content in the middle area of the wear scar, Overall, both FeCrAl and FeCrAl/CrN, as well as
accompanied by a corresponding decreased of iron Zr-4, undergo oxidation wear in air and B-Li water.
content. Raman spectroscopy result indicated that Fe O 3 After the preparation of the FeCrAl coating on the Zr-4,
2
was the main oxide in the wear track. The wear the wear mechanism shifted from adhesive wear to
mechanism of the FeCrAl primarily involves adhesion abrasive wear. This could be attributed to two reasons.
wear and oxidation wear. Firstly, compared with Fe, Zr and ZrO have stronger
2
For the FeCrAl/CrN coating, there were noticeable interdiffusion, which leads to adhesion easily. Secondly,
“plow-like” scratch marks in the wear track, as shown the preparation of FeCrAl coatings increases the
in Fig. 12(c). EDS line scan result indicated a slight hardness of the samples, especially the FeCrAl/CrN,
increase in oxygen content in the wear area, while the which could suppress the elastic deformation of the
content of other elements were not significant change. samples, and the hard oxide phases causing considerable