Laser Ablation Behavior of W/ZrC Cermet Fabricated by Displacive Compensation of Porosity (DCP) Method

doi:10.15541/jim20170089

Abstract

Abstract:

W/ZrC cermet was successfully fabricated by a Displacive Compensation of Porosity method, and then laser ablation behaviors of W/ZrC cermet under different laser energy and ablation time were studied. Results showed that a small ablation pit was produced on the W/ZrC cermet during the laser ablation, and depth of the ablation pit increased with increasing laser power and prolonging ablation time. Besides, several homocentric loops which had different kinds and microstructures of oxides were formed around the ablation pit. The volatilization of residual Cu and formation of ZrO₂ layer played significant roles in protecting W/ZrC cermet from being further oxidized during the laser ablation.

Key words: W/ZrC cermet, laser ablation, microstructure

CLC Number:

TQ174

YU Yi-Ping, WANG Song, LI Wei. Laser Ablation Behavior of W/ZrC Cermet Fabricated by Displacive Compensation of Porosity (DCP) Method[J]. Journal of Inorganic Materials, 2017, 32(12): 1332-1336.

Figures/Tables 5

Fig. 1 Backscattered electron image (a) and XRD pattern (b) of W/ZrC cermet fabricated by DCP method

Fig. 2 Morphologies of the laser ablation surface of W/ZrC cermet Under different laser energy for 30 s: (a) 10 J/s; (b) 20 J/s; (c) 30 J/s Under different ablation time with a 30 J/s laser: (d) 5 s; (e) 60 s; (f) 120 s

Fig. 3 The laser ablation depth of W/ZrC cermet (a) Under different laser energy for 30 s; (b) Under different ablation time with a 30 J/s laser

Fig. 4 Morphologies and EDS analysis of the laser ablation surface of W/ZrC cermet^(a) Macro morphology; (b-e) Micro morphologies relative to part I -IV, respectively

Fig. 5 Secondary electron image and backscattered electron image of the polished surface of ablation pit of W/ZrC cermet

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