| SiCf/SiC复合材料表面Si/Yb2Si2O7双层涂层结合强度分析 |
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| 引用本文： | 张乐,张艺馨,牛亚然,李其连,邓杨芳,周海滨,姚远,罗文东.SiCf/SiC复合材料表面Si/Yb2Si2O7双层涂层结合强度分析[J].表面技术,2022,51(3):199-207. |
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| 作者姓名： | 张乐 张艺馨 牛亚然 李其连 邓杨芳 周海滨 姚远 罗文东 |
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| 作者单位： | 中国航空制造技术研究院 高能束流加工技术重点实验室,北京 100024;先进表面工程技术航空科技重点实验室,北京 100024,中国航发沈阳黎明航空发动机有限责任公司,沈阳 110043,中国科学院上海硅酸盐研究所,上海 2000504,中国航发四川燃气涡轮研究院,成都 610500,军事科学院 系统工程研究院,北京 100082,中国航空制造技术研究院 复合材料技术中心,北京 100024 |
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| 基金项目： | 国家科技重大专项(2017-VI-0020-0092，2017-VI-0007-0076) |
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| 摘 要： | 目的 通过选择合适的复合材料拉伸方向和涂层制备工艺,在SiCf/SiC复材上获得高结合强度的Si/Yb2Si2O7双层涂层.方法 采用真空等离子喷涂技术在2.5D编织的SiCf/SiC复合材料表面制备Si涂层、Si/Yb2Si2O7双层涂层.采用金相、XRD、SEM和EDS对试样进行表征,采用拉伸试验测试涂层的结合强度...
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| 关 键 词： | SiCf/SiC Si/Yb2Si2O7双层涂层 真空等离子喷涂 环境障涂层 结合强度 |
| 收稿时间： | 2021/4/9 0:00:00 |
| 修稿时间： | 2021/9/6 0:00:00 |
Bonding Strength of Si/Yb2Si2O7 Duplex Coatings on SiCf/SiC Composites |
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| ZHANG Le,ZHANG Yi-xin,NIU Ya-ran,LI Qi-lian,DENG Yang-fang,ZHOU Hai-bin,YAO Yuan,LUO Wen-dong.Bonding Strength of Si/Yb2Si2O7 Duplex Coatings on SiCf/SiC Composites[J].Surface Technology,2022,51(3):199-207. |
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| Authors: | ZHANG Le ZHANG Yi-xin NIU Ya-ran LI Qi-lian DENG Yang-fang ZHOU Hai-bin YAO Yuan LUO Wen-dong |
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| Affiliation: | Science and Technology on Power Beam Processes Laboratory, AVIC Manufacturing Technology Institute, Beijing 100024, China;Aviation Key Laboratory of Science and Technology on Advanced Surface Engineering, Beijing 100024, China;AECC Shenyang Liming Aero Engine Corporation Ltd., Shenyang 110043, China;Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;AECC Sichuan Gas Turbine Establishment, Chengdu 610500, China;Institute of System Engineering, AMS, PLA, Beijing 100082, China; Composite Technology Center, AVIC Manufacturing Technology Institute, Beijing 100024, China |
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| Abstract: | By the means of choosing suitable stretched direction of SiC fiber-reinforced SiC ceramic matrix composites (SiCf/SiC composites) and preparation technology of coatings, this work aims to obtain Si/Yb2Si2O7 duplex coatings of high bonding strength on SiCf/SiC composites. Si coating and Si/Yb2Si2O7 duplex coatings were prepared by vacuum plasma spraying (VPS) on 2.5D woven SiCf/SiC composites. The specimens were investigated by metallographic, XRD, SEM and EDS, and the bonding strength was tested by tensile test. The fracture morphology after the tensile test was observed and possible influence factors of the bonding strength were analyzed. The results show that:by using adhesion-drawing method, the tensile strength of 2.5D woven SiCf/SiC composites is (32.41±3.52) MPa. Porosities of Si coating and Yb2Si2O7 coating are 2.3% and 5.2%. The bonding strength of Si coating on SiCf/SiC is (30.48±4.43) MPa, while that of Si/Yb2Si2O7 duplex coatings (26.23±3.13) MPa. When the Si coating is stretching, parts of Si coating, weft yarn of SiC fibers and SiC ceramic matrix on the surface of SiCf/SiC composites and adhesive film are broken. When the Si/Yb2Si2O7 duplex coating is stretching, a great deal of Si coating, weft yarn of SiC fibers and SiC ceramic matrix on the surface of SiCf/SiC composites and a little of Yb2Si2O7 coating are broken. The main reasons for the high bonding strength of Si/Yb2Si2O7 duplex coatings on SiCf/SiC composites are as follows:the strength of SiCf/SiC along stretched direction is high, and the bonding strength of Si coating and SiCf/SiC is high; the vacuum plasma spraying is beneficial to decrease the defects of coatings; thermal expansion coefficient of Yb2Si2O7 is approximately with that of Si and SiCf/SiC; chemical compatibility between Si coating and Yb2Si2O7 coating is excellent. |
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| Keywords: | SiCf/SiC Si/Yb2Si2O7 duplex coating vacuum plasma spraying environmental barrier coating bonding strength |
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