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等离子喷涂-物理气相沉积制备纳米复合结构环境障涂层及其热循环性能(英文)

Nano-composite Structured Environmental Barrier Coatings Prepared by Plasma Spray-Physical Vapor Deposition and Their Thermal Cycle Performance

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【作者】 王超张小锋周克崧刘敏邓畅光邓春明牛少鹏许世鸣陈志坤曾威

【Author】 Wang Chao;Zhang Xiaofeng;Zhou Kesong;Liu Min;Deng Changguang;Deng Chunming;Niu Shaopeng;Xu Shiming;Chen Zhikun;Zeng Wei;The Key Laboratory of Guangdong for Modern Surface Engineering Technology, National Engineering Laboratory for Modern Materials Surface Engineering Technology, Guangdong Institute of New Materials;South China University of Technology;

【通讯作者】 张小锋;

【机构】 广东省新材料研究所现代材料表面工程技术国家工程实验室广东省现代表面工程技术重点实验室华南理工大学

【摘要】 在SiC/SiC陶瓷基复合材料(CMC)上制备了具有3层结构(Si/Mullite/Yb2SiO5)的环境障涂层(EBCs)。提出了一种新的等离子喷涂-物理气相沉积(PS-PVD)方法制备EBCs以减少Si C/Si C CMC在水氧腐蚀下的降解。在制备EBCs之前,用喷雾干燥塔制备了团聚的Yb2SiO5粉末。然后通过PS-PVD技术制备了致密的EBCs,得到了具有层状和柱状复合结构的Yb2SiO5涂层,并给出了这种特殊结构的沉积示意图。此外,测试了PS-PVD制备的EBCs在1300℃到室温水中的热循环性能。在30次热循环实验后未出现明显的散裂现象,表明EBCs具有良好的抗热震性能。

【Abstract】 Environmental barrier coatings(EBCs) consisting of a tri-layer structure(Si/mullite/Yb2SiO5) were prepared on Si C/Si C ceramic matrix composite(CMC). For decreasing the degradation of water-oxygen corrosion of Si C/Si C CMC, a novel EBCs fabrication method of plasma spray-physical vapor deposition(PS-PVD) was proposed in this work. Prior to EBCs preparation, agglomerated Yb2SiO5 powders was fabricated by spray dryer. After that, dense EBCs were fabricated by PS-PVD technique, where the Yb2SiO5 coating with laminar and columnar composited structure was achieved. And the deposition diagram of this special structure was presented. Besides, the thermal cycle performance of PS-PVD EBCs was tested from 1300 ℃ to room temperature in water. Results show that no apparent spallation appears after 30 cycles, indicating that the EBCs have a good thermal shock performance.

【基金】 National Key R&D Program of China(2017YFB0306100);Guangdong Academy of Sciences Program(4052018XMZC0001020364,2017GDASCX-0843,2017GDASCX-0202);Guangdong Technical Research Program(2014B070706026);Guangzhou Technical Research Program(201605131008557,201707010385,201510010095);Guangdong Natural Science Foundation(2016A030312015,2017A030310315)
  • 【文献出处】 稀有金属材料与工程 ,Rare Metal Materials and Engineering , 编辑部邮箱 ,2019年11期
  • 【分类号】TB306
  • 【被引频次】9
  • 【下载频次】270
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