长期氧化、表面粗糙度对多元包覆YSZ涂层材料的1300℃窄波段积分发射率的影响规律研究  

Study on the Effects of Long-Term Oxidation and Surface Roughness on the Narrow-Band Integral Emissivity at 1300℃of Multi-Coated YSZ Coating Materials

作　　者：冯宇涛 刘森辉 李成新[1] 李长久[1] FENG Yutao;LIU Senhui;LI Chengxin;LI Changjiu(School of Materials Science and Engineering,Institute of Welding and Coating,Xi'an Jiaotong University,Xi'an 710049,China)

机构地区：[1]西安交通大学材料科学与工程学院、金属材料强度国家重点实验室焊接与涂层研究所,西安71009

出　　处：《热喷涂技术》2025年第1期84-97,共14页Thermal Spray Technology

基　　金：国家重点研发计划(2021YFB4001400);陕西省重点研发计划(S2023-YF-LLRH-QCYK-0201);先进功能涂层技术西安国际合作研究中心、清洁高效透平动力装备全国重点实验室(DEC8300CG202319411EE280490);国家自然科学基金重点项目(U2430212)。

摘　　要：氧化锆具有2 680℃的高熔点,以及2.12 W/mK的低热导率。通过掺杂氧化钇抑制其晶型转变的氧化钇稳定氧化锆(Yttria-Stabilized Zirconia,YSZ)是目前使用最为广泛的热障涂层材料,能够长期承受1 100℃的高温。然而,当温度超过1 000℃时,部件的辐射强度会显著增大,导致辐射传热的比例不断提高。由于YSZ在高温下处于半透明状态,难以有效阻碍辐射传热。针对YSZ在1 000℃以上无法有效抑制辐射传热的问题,本研究系统探讨了影响YSZ涂层材料积分发射率的关键因素,包括粗糙度、角度和长期氧化等,揭示了这些因素对YSZ积分发射率的影响规律,并通过多元金属掺杂实现了YSZ涂层积分发射率的进一步降低。研究结果表明,YSZ涂层在1 100℃下的积分发射率主要受粗糙度和掺杂成分的影响。具体而言,粗糙度越大,涂层的积分发射率越高。通过添加Ni、Al等元素或采用Pt包覆工艺,可以有效降低YSZ的积分发射率,使其最终降至0.18±0.03。其中,Pt包覆虽然效果显著,但成本较高;相比之下,Ni和Al的掺杂方案更具成本优势。在1 100℃长期氧化实验中,系统测量了样品在不同氧化时间下的发射强度变化,测试温度分别为1 100℃和1 300℃。实验发现,Al或Ni单独掺杂的YSZ材料表现出较好的积分发射率稳定性。具体而言,Ni-YSZ在经历1 100℃长期氧化500 h后,其1 100℃下的发射率变化控制在14%以内;而NiAl双掺杂材料在经过100 h氧化后,积分发射率出现显著提升。本研究通过系统的多元掺杂实验和积分发射率影响因素分析,为高温辐射抑制涂层的开发提供了重要的理论依据。这些研究成果有望应用于航空航天和燃气轮机等高温服役环境中的关键部件。Zirconia exhibt a high melting point of 2680℃and a low thermal conductivity of 2.12 Yttria-Stabilized Zirconia(YSZ),which is doped with yttrium oxide to inhibit its crystalline transition,is currently the most widely used material for thermal barrier coatings and is capable of withstanding high temperatures up to 1100°C for a long time.However,at temperatures above 1000℃,the radiation intensity of components increases steadily,and the proportion of radiative heat transfer rises accordingly,while YSZ remains semitransparent at high temperatures and cannot effectively impede radiative heat transfer.To address the issue of YSZ being unable to effectively suppress radiative heat transfer above 1000℃,factors influencing the total emissivity of YSZ coatings,such as roughness,angle,and long-term oxidation,were investigated.The study revealed the effects of roughness and long-term oxidation on the total emissivity of YSZ,and further reduced the total emissivity of YSZ coatings through multicomponent metal doping.The results show that the total emissivity of YSZ coatings at 1100℃is significantly influenced by surface roughness and doping composition.Higher surface roughness results in higher emissivity.Additionally,the total emissivity of YSZ is effectively reduced by introducing elements such as Ni and Al or applying Pt coating.The emissivity is ultimately reduced to 0.18±0.03,with Pt coating showing the most notable effect,though at a higher cost.In contrast,Ni and Al doping strategies offered a more cost-effective solution.During long-term oxidation experiments at 1100℃,the emissivity variations of samples are measured with increasing oxidation time at 1100℃and 1300℃.YSZ materials doped with Ni or Al individually exhibit better emissivity stability.For Ni-doped YSZ,the emissivity change after 500 hours of oxidation at 1100℃remained within 14%.However,NiAl co-doped materials show a significant increase in total emissivity after 100 hours of oxidation.Through experimental investigations into rational mu

关 键 词：等离子喷涂 热障涂层 发射率 掺杂改性 YSZ 

分 类 号：TG174.4[金属学及工艺—金属表面处理]