Fig.1

Design scheme of protective coating system and preparation process schematic diagram of optimized ZrB2/SiC/CVD-SiC coating

Fig. 2

Schematic diagram of CVD-SiC reaction device

Table 1

CVD-SiC precipitation parameters

Table 2

Fs laser etched parameters

Fig.3

SEM photographs of ZrB2/SiC powder

Table 3

Spraying parameters

Fig.4

Schematic diagram of ablation test

Table 4

Ablation parameters

Fig.5

Effect of laser etched repetition on depth of CVD-SiC surface

Fig.6

3D surface morphologies and cross section morphologies of array structure surfaces

Fig.7

Surface and section SEM photographs of array structure etched 5 times and C， O， Si elemental distributions after femtosecond laser etching

Fig.8

SEM photograph for cross-section of coating and schematic of spring and bonding of ZrB2/SiC coating

Fig.9

Temperature curves under thermal conductive graphite grinding tool

Fig.10

Abrasion curves under insulated asbestos substrate

Fig.11

Schematic diagram of heat flow spreading mechanism

Fig.12

Photographs of sample after ablation at different etched repetitions under thermal conductive graphite grinding tool

Fig.13

XRD pattern of coating of sample 5 times after ablation

Fig.14

Cross-section SEM photographs and EDS elemental distributions of samples etched 5 times

Fig.15

Schematic diagram of anti-ablation process

Fig.16

Effect of ablation cycles on ablation performance

Fig.17

Photograph of sample after 3 cycles ablation

Fig.18

SEM photographs of surface after 10 min（3 cycles） of ablation

Fig.19

Photograph of sample without CVD-SiC transition layer after 10 min of ablation