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投稿时间:2024-12-17 修订日期:2024-12-17
投稿时间:2024-12-17 修订日期:2024-12-17
中文摘要: 随着航空发动机的更新迭代,对航空发动机热端部件及其防护材料提出了更高的要求。环境障涂层经过长时间发展,形成了以稀土硅酸盐为主的第三代环境障碍涂层,但是面临长时间CaO-MgO-Al2O3-SiO2 (CMAS)腐蚀,其性能仍难以满足实际工程应用需求。本工作针对1350oC高温下CMAS的腐蚀环境,研究不同热处理时长对Yb2Si2O7- Yb2SiO5复相涂层涂层微观结构及抗CMAS腐蚀性能的影响,分析了不同热处理时长对复相涂层抗CMAS腐蚀能力影响的原因。结果表明:热处理过程中,由于发生相转变引起体积膨胀,涂层内的残余应力由拉应力逐渐转变为压应力,有利于涂层内部裂纹的愈合。腐蚀产物主要是针状的磷灰石相Ca2Yb8(SiO4)6O2,适当时间的热处理可以提高复相陶瓷的抗CAMS腐蚀能力。
Abstract:With the continuous update and iteration of aviation engines, higher requirements are put forward for the hot-end components and protective materials of aviation engines. The environmental barrier coating has undergone long-term development and has formed the third-generation environmental barrier coating based on rare earth silicates, but its performance is still difficult to meet the actual engineering application requirements in the long-term CMAS corrosion environment. This work studied the influence of different heat treatment times on the microstructures and anti-CMAS corrosion properties of the Yb2Si2O7- Yb2SiO5 composite coating at 1350°C, and analyzed the reasons for the influence of different heat treatment times on the anti-CMAS corrosion ability of the composite coating. The results show that during the heat treatment process, the volume expansion caused by the phase transformation leads the residual stress in the coating to change from tensile stress to compressive stress, which is beneficial to the healing of cracks in the coating. The corrosion product is mainly the needle-shaped apatite phase Ca2Yb8(SiO4)6O2, and appropriate heat treatment can improve the anti-CMAS corrosion ability of the composite ceramic.
文章编号: 中图分类号:TG174.4 文献标志码:
基金项目:
作者 | 单位 | 邮编 |
王顺* | 北京理工大学先进结构技术研究院 | 100081 |
郭东辉 | 北京理工大学先进结构技术研究院 | 100081 |
徐宝升 | 北京理工大学先进结构技术研究院 | 100081 |
引用文本:
王顺,郭东辉,徐宝升.热处理对Yb2Si2O7- Yb2SiO5复相涂层抗CMAS腐蚀性能的影响[J].热喷涂技术,2024,16(4):46-54.
Shun Wang,Donghui Guo,Baosheng Xu.Effect of heat treatment on CMAS corrosion resistance of Yb2Si2O7- Yb2SiO5 multiphase coatings[J].Thermal Spray Technology,2024,16(4):46-54.
王顺,郭东辉,徐宝升.热处理对Yb2Si2O7- Yb2SiO5复相涂层抗CMAS腐蚀性能的影响[J].热喷涂技术,2024,16(4):46-54.
Shun Wang,Donghui Guo,Baosheng Xu.Effect of heat treatment on CMAS corrosion resistance of Yb2Si2O7- Yb2SiO5 multiphase coatings[J].Thermal Spray Technology,2024,16(4):46-54.