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Ablation behaviour of ZrC coating by novel solid shielding/shrouded plasma spray
Surface Engineering ( IF 2.8 ) Pub Date : 2021-02-23 , DOI: 10.1080/02670844.2020.1850195
Akbar Eshaghi 1 , Zia Valefi 1 , Naser Ehsani 1
Affiliation  

ABSTRACT

In this study, for the first time, ZrC coating was deposited on SiC coated graphite by optimized atmospheric plasma spray (i.e. solid shielding shrouded plasma spray (SSPS)) method. Then SSPS-ZrC coatings were compared with the atmospheric plasma spray APS-ZrC coatings. The results indicated that the the SSPS-ZrC coated sample had lower porosity compared with APS-ZrC coating (3% and 7.5% respectively) and the ablation test revealed that the linear and mass ablation rates of the ZrC coating applied by APS method were 3.7×10−3 mm.s−1 and 22×10−3 g.s−1, while those for SSPS coating were 2.2×10−3 mm.s−1 and 14×10−3 g.s−1, respectively. The results showed that applying the ZrC coating with the SSPS method can improve the ablation resistance of the equipment used in harsh conditions, significantly. It is attributed to the formation of a continuous zirconia (ZrO2) layer on the surface during the ablation test of the ZrC coating.



中文翻译:

新型固体屏蔽/覆盖等离子喷涂对 ZrC 涂层的烧蚀行为

摘要

在这项研究中,ZrC 涂层首次通过优化的大气等离子喷涂(即固体屏蔽罩等离子喷涂(SSPS))方法沉积在碳化硅涂层石墨上。然后将 SSPS-ZrC 涂层与大气等离子喷涂 APS-ZrC 涂层进行比较。结果表明,与 APS-ZrC 涂层相比,SSPS-ZrC 涂层样品具有较低的孔隙率(分别为 3% 和 7.5%),烧蚀试验表明,APS 法涂覆的 ZrC 涂层的线性和质量烧蚀率为 3.7 ×10 -3 mm.s -1和22×10 -3 gs -1,而SSPS涂层为2.2×10 -3 mm.s -1和14×10 -3 gs -1, 分别。结果表明,采用 SSPS 方法应用 ZrC 涂层可以显着提高在恶劣条件下使用的设备的抗烧蚀性。这归因于在 ZrC 涂层的烧蚀试验期间在表面上形成了连续的氧化锆 (ZrO 2 ) 层。

更新日期:2021-02-23
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