SiC纳米线对大气等离子喷涂硅涂层性能的影响

doi:10.3969/j.issn.1001-1935.2024.05.001

耐火材料 ›› 2024, Vol. 58 ›› Issue (5): 369-375.DOI: 10.3969/j.issn.1001-1935.2024.05.001

• 研究开发 • 下一篇

SiC纳米线对大气等离子喷涂硅涂层性能的影响

王博¹⁾, 庄辛鹏²⁾, 李归¹⁾, 王宇龙¹⁾, 李媛琪¹⁾, 施伟³⁾, 李佳艳¹⁾

1)大连理工大学材料科学与工程学院辽宁大连 116024
2)中国兵器科学研究院宁波分院浙江宁波 315103;
3)大连海洋大学机械与动力工程学院辽宁大连 116023

收稿日期:2024-03-11 出版日期:2024-10-15 发布日期:2024-10-16
作者简介:王博:女,1991年生,博士研究生。E-mail:wangbo18@mail.dlut.edu.cn
基金资助:
中央引导地方科技发展专项项目(2021FRD05006)。

Effect of SiC nanowires on performance of atmosphere plasma sprayed Si coatings

Wang Bo, Zhuang Xinpeng, Li Gui, Wang Yulong, Li Yuanqi, Shi Wei, Li Jiayan

School of Materials Science and Engineering,Dalian University of Technology,Dalian 116024,Liaoning,China

Received:2024-03-11 Online:2024-10-15 Published:2024-10-16

摘要/Abstract

摘要： 为提升C/SiC复合材料表面Si涂层的韧性及其与C/SiC复合材料的结合强度,首先以10 mm×10 mm×10 mm的C/SiC复合材料作为基体,在基体表面生成约20 μm厚的SiC纳米线(SiCnws)多孔层;再用大气等离子体喷涂法分别将生长SiCnws的基体和未生长SiCnws的基体喷涂约30、60、90 μm厚的Si涂层。研究SiCnws对涂层试样的结合强度和抗氧化性的影响,并借助XRD、SEM、TEM和EDS对所制备的SiCnws和SiCnws/Si涂层进行物相组成、显微结构的分析。结果表明:1)制备的SiCnws形状平直,表面光滑,取向随机,直径为100～200 nm,是沿[111]晶向择优生长的β-SiC;2)SiCnws引入到Si涂层后,SiCnws/Si涂层试样的结合强度均比相应的Si涂层试样的高,说明SiCnws增强了Si涂层与C/SiC复合材料的结合;3)从室温至1 400 ℃经历12次热震循环后,SiCnws/Si涂层试样的质量损失率比相应Si涂层试样的低20.7%~37.2%,说明SiCnws能有效缓解热应力,抑制裂纹的形成和扩展,降低裂纹尺寸和数量,提高涂层的抗氧化性。

关键词: C/SiC复合材料, SiC纳米线, Si涂层, 抗氧化性能, 结合强度

Abstract: This work aims at improving the toughness of Si coatings in C/SiC composite surface and the bonding strength between them.C/SiC composites with the sizes of 10 mm×10 mm×10 mm were used as the matrix and a 20 μm SiC nanowire (SiCnws) porous layer was in-situ generated on the matrix surface;then,Si coatings with different thicknesses (30,60,and 90 μm) were sprayed on the matrix with or without the SiC nanowire porous layer by the atmosphere plasma sprayed method.The effect of the SiCnws on the bonding strength and oxidation resistance of the coated samples were investigated.The phase and morphology of the SiCnws and SiCnws/Si coatings were characterized by XRD,SEM,TEM and EDS.The results show that (1) the obtained SiCnws have flat shapes,smooth surface,random orientation,with diameters of 100-200 nm,which are β-SiC with a preferential growing direction along [111];(2)the bonding strength of the SiCnws/Si with the matrix is higher than that of the Si coating with the matrix,so the introduction of SiCnws increases the bonding strength;(3)the mass loss of the SiCnws/Si coatings is 20.7%-37.2% lower than that of the Si coatings after suffering 12 cycles of thermal shocks between the room temperature and 1 400 ℃,indicating that SiCnws release the thermal stress,prevent the formation and growth of cracks,and enhance the oxidation resistance.

Key words: C/SiC composites, SiC nanowires, Si coating, oxidation resistance, bonding strength

中图分类号:

TB332

王博, 庄辛鹏, 李归, 王宇龙, 李媛琪, 施伟, 李佳艳. SiC纳米线对大气等离子喷涂硅涂层性能的影响[J]. 耐火材料, 2024, 58(5): 369-375.

Wang Bo, Zhuang Xinpeng, Li Gui, Wang Yulong, Li Yuanqi, Shi Wei, Li Jiayan. Effect of SiC nanowires on performance of atmosphere plasma sprayed Si coatings[J]. Refractories, 2024, 58(5): 369-375.

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SiC纳米线对大气等离子喷涂硅涂层性能的影响

Effect of SiC nanowires on performance of atmosphere plasma sprayed Si coatings

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