DCP法W/ZrC金属陶瓷的激光烧蚀行为研究

doi:10.15541/jim20170089

摘要/Abstract

摘要：

采用DCP法制备了W/ZrC金属陶瓷, 然后研究了在不同激光能量和烧蚀时间下W/ZrC金属陶瓷的激光烧蚀行为。研究表明: W/ZrC金属陶瓷在激光烧蚀过程中产生了一个较小的烧蚀坑, 烧蚀坑的深度随着激光能量的增加和烧蚀时间的延长而增大。在烧蚀坑的周围, 许多不同种类和结构的氧化物堆积组成了几个同心环。铜的挥发和氧化锆层的形成对防止W/ZrC金属陶瓷进一步氧化有着重要作用。

关键词: W/ZrC金属陶瓷, 激光烧蚀, 微观结构

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

中图分类号:

TQ174

余艺平, 王松, 李伟. DCP法W/ZrC金属陶瓷的激光烧蚀行为研究[J]. 无机材料学报, 2017, 32(12): 1332-1336.

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.

图/表 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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