PSI - Issue 32

M.A. Eryomina et al. / Procedia Structural Integrity 32 (2021) 284–290 Eremina/ Structural Integrity Procedia 00 (2019) 000 – 000

288

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of large pores along with thicker layers of soft binder metal between carbide inclusions facilitate the penetration of abrasive grains to a considerable depth, which leads to severe destruction of the sample surface.

Table 3. Coefficients of friction and values of linear wear of samples .

Maximal wear after 10-min friction against WC-Co alloy ball (  m) (±0.5)

Maximal wear after 10-min friction against steel disc (  m) (±2)

Maximal wear after 10-min friction against steel ball (  m) (±0.5)

Average coefficient of friction against WC-Co alloy ball (±0.01)

Average coefficient of friction against steel disc (±0.01)

Average coefficient of friction against steel ball (±0.01)

Sample

1 2 3 4

0.45 0.27 0.54 0.60

10

- - - -

- - - -

0.33

10

2 7 4

0.11*/0.35 0.11*/0.45 0.13*/0.53

7 1 2 0

Compacts

Coating 1

-

-

0.20*/0.28

1

0.22

*at the initial stage of testing

a

1 cm

b

70  m

c

Fig. 4.(a) Optical image of the surface, (b) cross section, and (c) XRD pattern of the coating.