16 May 2013 Reflectivity and laser ablation of ZrB2/Cu ultra high temperature ceramic
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Proceedings Volume 8796, 2nd International Symposium on Laser Interaction with Matter (LIMIS 2012); 87960T (2013) https://doi.org/10.1117/12.2011293
Event: 2nd International Symposium on Laser Interaction with Matter (LIMIS 2012), 2012, Xi'an, Shaanxi, China
Abstract
Ultra high temperature ceramics (UHTCs) were thought to be candidates for laser protective materials due to their high melting point, thermal shock and ablation resistance. The ablation behaviors of UHTCs like ZrB2 and its composite had been intensely investigated by the means of arc, plasma, oxyacetylene ablation. However, the ablation behavior under laser irradiation was still unknown by now. In this paper, the dense bulk composites of ZrB2/Cu were successfully sintered by spark plasma sintering (SPS) at 1650 degree C for 3min. The reflectivity of the composites measured by spectrophotometry achieved 60% in near infrared range and it decreased with the increasing wavelength of incident light. High intensity laser ablation was carried out on the ZrB2/Cu surface. The phase composition and microstructure changes before and after laser irradiation were characterized by X-ray diffraction and SEM respectively. The results revealed that the oxidation and melting were the main mechanisms during the ablation processing.
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Zhenyu Yan, Zhenyu Yan, Zhuang Ma, Zhuang Ma, Shizhen Zhu, Shizhen Zhu, Ling Liu, Ling Liu, Qiang Xu, Qiang Xu, } "Reflectivity and laser ablation of ZrB2/Cu ultra high temperature ceramic", Proc. SPIE 8796, 2nd International Symposium on Laser Interaction with Matter (LIMIS 2012), 87960T (16 May 2013); doi: 10.1117/12.2011293; https://doi.org/10.1117/12.2011293
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