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首页> 外文期刊>Applied Surface Science >Plasma sprayed Lanthanum zirconate coating over additively manufactured carbon nanotube reinforced Ni-based Composite: Unique performance of thermal barrier coating system without bondcoat
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Plasma sprayed Lanthanum zirconate coating over additively manufactured carbon nanotube reinforced Ni-based Composite: Unique performance of thermal barrier coating system without bondcoat

机译：等离子体喷涂镧镀锌涂层含有含量的碳纳米管加强Ni的复合材料：无粘连涂层的热障涂层系统的独特性能

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摘要

For advanced thermal barrier coating (TBC) system in a modern aero and land based engine, there is pressing needs to impede the uncontrolled growth of thermally grown oxide (TGO) layers as well as the weight reduction of overall TBC system. To address both the issues, present study introduces a ?bondcoat less? TBC. Selective laser melting (SLM) technique has been used to fabricate two different substrates of composition NiCrAlY and NiCrAlY + 1 wt% carbon nanotube (CNT). Lanthanum zirconate (LZ) coating was deposited over the prepared substrate by plasma spraying technique. SLM processed NiCrAlY + 1 wt% CNT substrate showed the relatively higher increase in hardness and elastic modulus by 1.6 and 2.7 times, respectively. Top coat LZ coating and reinforced CNTs in NiCrAlY significantly suppressed the growth of the TGO layer at 1800 ?C. It is shown that a fine microstructure, absence of pores in the coating and addition of CNTs in conjunction prevent the diffusion of the reactive species Al, Cr, Y from the NiCrAlY substrate towards the coating interface. Further, LZ coating despotised over NiCrAlY + 1 wt% CNT substrate was intact even after 48 cycles during the thermal shock resistance performed at 1800 ?C.
机译：对于现代航空和陆基发动机的先进的热障涂层（TBC）系统，需要妨碍热生长氧化物（TGO）层的不受控制的生长以及整体TBC系统的重量减少。为了解决这两个问题，目前的研究介绍了一个少的粘合剂？ TBC。选择性激光熔化（SLM）技术已用于制造两种不同的组合物肌肉和幼亮+ 1wt％碳纳米管（CNT）的基底。通过等离子体喷涂技术在制备的基材上沉积镧锆酸盐（LZ）涂层。 SLM加工的Nicraly + 1wt％CNT衬底显示硬度和弹性模量的相对较高增加1.6和2.7倍。顶层涂层LZ涂层和Nicraly的增强CNT显着抑制了1800℃的TGO层的生长。结果表明，涂​​层中不存在孔的细菌，并结合添加CNT，防止反应物种Al，Cr，Y的扩散朝向涂层界面。此外，即使在1800℃下进行的热抗冲击性期间，即使在48次循环之后，LZ覆盖也完好无损。

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