付朗,毛杰,邓子谦,邓春明,刘敏,曾德长.PS-PVD制备锆酸钆热障涂层及其性能研究[J].表面技术,2021,50(10):293-300.
FU Lang,MAO Jie,DENG Zi-qian,DENG Chun-ming,LIU Min,ZENG De-chang.Microstructure and Mechanical Properties of Gadolinium Zirconate Coatings Prepared by Plasma Spray-Physical Vapor Deposition[J].Surface Technology,2021,50(10):293-300 |
| PS-PVD制备锆酸钆热障涂层及其性能研究 |
| Microstructure and Mechanical Properties of Gadolinium Zirconate Coatings Prepared by Plasma Spray-Physical Vapor Deposition |
| 投稿时间：2020-11-03 修订日期：2021-02-25 |
| DOI：10.16490/j.cnki.issn.1001-3660.2021.10.030 |
| 中文关键词: 热障涂层 双陶瓷层体系 锆酸钆 等离子喷涂-物理气相沉积 杨氏模量 |
| 英文关键词:thermal barrier coatings (TBCs) double ceramic layer system gadolinium zirconate plasma spray-physical vapor deposition (PS-PVD) Young’s modulus |
| 基金项目:广东省重点领域计划(2019B010936001);国家科技重大专项(2017-VI-0010-0081);广东特支计划本土创新创业团队(2019BT02C629);广东省科技计划项目(2020B1515020036，2020B151502122);广州市科技计划项目(202007020008);广东省科学院项目(2019GDASYL-0104022);国家自然科学基金青年基金(52001077) |
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| Author | Institution |
| FU Lang | School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China;Key Lab of Guangdong for Modern Surface Engineering Technology, National Engineering Laboratory for Modern Materials Surface Engineering Technology, Institute of New Materials, Guangdong Academy of Sciences, Guangzhou 510651, China |
| MAO Jie | Key Lab of Guangdong for Modern Surface Engineering Technology, National Engineering Laboratory for Modern Materials Surface Engineering Technology, Institute of New Materials, Guangdong Academy of Sciences, Guangzhou 510651, China |
| DENG Zi-qian | Key Lab of Guangdong for Modern Surface Engineering Technology, National Engineering Laboratory for Modern Materials Surface Engineering Technology, Institute of New Materials, Guangdong Academy of Sciences, Guangzhou 510651, China |
| DENG Chun-ming | Key Lab of Guangdong for Modern Surface Engineering Technology, National Engineering Laboratory for Modern Materials Surface Engineering Technology, Institute of New Materials, Guangdong Academy of Sciences, Guangzhou 510651, China |
| LIU Min | Key Lab of Guangdong for Modern Surface Engineering Technology, National Engineering Laboratory for Modern Materials Surface Engineering Technology, Institute of New Materials, Guangdong Academy of Sciences, Guangzhou 510651, China |
| ZENG De-chang | School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China |
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| 中文摘要: |
| 目的 采用等离子喷涂-物理气相沉积(PS-PVD)工艺制备出柱状结构完整、力学性能优异的锆酸钆热障涂层。方法 以纳米团聚的8YSZ、Gd2Zr2O7(GZO)及(Gd0.9Yb0.1)2Zr2O7(GYbZ)粉末为原料，采用PS-PVD工艺在镍基高温合金表面分别制备单层GZO涂层、GZO/YSZ双层结构涂层及GYbZ/YSZ双层结构涂层。采用X射线衍射仪、扫描电镜、能谱分析等检测手段，表征了热障涂层的相组成、微观结构及化学成分变化。采用纳米压痕试验仪测试了涂层的力学性能。采用电子万能试验机测试涂层的结合强度。结果 GZO涂层与GYbZ涂层均为缺陷萤石相，涂层均呈现典型的羽毛柱状结构，且柱晶间隙存在大量的未熔粒子。在制备过程中，单层GZO涂层便出现了剥落，双陶瓷层结构中的GZO涂层未剥落但内部存在大量微裂纹，而Yb掺杂的GZO涂层((Gd0.9Yb0.1)2Zr2O7，GYbZ)内无裂纹存在;和GZO涂层相比，GYbZ涂层具有更高的硬度(5.4 GPa)、杨氏模量(111.6 GPa)和结合强度(41.3 MPa)。结论 采用现有的PS-PVD工艺参数，成功制备出柱状结构的单层GZO涂层、GZO/YSZ及GYbZ/YSZ双陶瓷层热障涂层，YSZ作为中间过渡层能改善GZO涂层与粘结层的热膨胀不匹配，而Yb元素的加入，可以有效提高GZO涂层的硬度和结合强度，但同时也会造成涂层的杨氏模量升高。 |
| 英文摘要: |
| The paper aims to prepare gadolinium zirconate thermal barrier coatings (TBCs) with perfect columnar structure and excellent mechanical properties by plasma spraying-physical vapor deposition (PS-PVD). Using nano agglomerated 8YSZ, Gd2Zr2O7 (GZO) and (Gd0.9Yb0.1)2Zr2O7 (GYbZ) powders as raw materials, GZO single ceramic layer (SCL), GZO/YSZ double ceramic layer (DCL) and GYbZ/YSZ DCL were prepared respectively on Ni-based superalloys by PS-PVD. The phase composition and microstructure of TBCs were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The mechanical properties of TBCs were tested by nano indentation tester and the bonding strength was tested by electronic universal testing machine. The results indicated that both GZO coating and GYbZ coating were defective fluorite phase and presented typical featherlike columnar structure, besides, there were many unmelted particles in the column crystal gap due to the liquid deposition. In the DCL system, the growth of GZO layer was along the growth direction of YSZ layer, but there was an obvious interface in element distribution between the two layers. For the thermal expansion mismatch between the GZO coating and bonding coating as well as the low fracture toughness of GZO materials, the GZO SCL peeled off in the preparation process. The GZO-DCL had no spalling but there were many microcracks inside, which indicated that YSZ coating could alleviate the thermal expansion mismatch between the GZO layer and bonding coating. Furthermore, no crack was found in Yb doped GZO (GYbZ)coating, because toughness of the GZO coating could be improved by doping Yb into GZO material. Besides, compared with GZO coating, Yb doped GZO(GYbZ)coating showed higher hardness (5.4 GPa), higher Young’s modulus (111.6 GPa), and higher tensile strength (41.3 MPa). In the tensile test, the fracture occurred in the GYbZ layer, indicating that the poor fracture toughness of GYbZ material is still the main reason for coating failure. |
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