YSZ–TiSiCThermal Barrier Coating and Its Self-Healing Mechanism Under High Temperatures

CHEN Hongfei; ZHANG Chi; YANG Guang; LIU Bin; GAO Yanfeng; QIAN Lingyi; GAO Dong

doi:10.16080/j.issn1671–833x.2019.18.090

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YSZ–TiSiCThermal Barrier Coating and Its Self-Healing Mechanism Under High Temperatures

更新时间：2025-10-30

- YSZ–TiSiCThermal Barrier Coating and Its Self-Healing Mechanism Under High Temperatures
- Aeronautical Manufacturing Technology Vol. 62, Issue 18, Pages: 90-96(2019)
- 作者机构：
  
  1. 上海大学材料科学与工程学院,上海,200444
  2. 中国航发商用航空发动机有限责任公司,上海,200241
- 作者简介：
- 基金信息：
- DOI：10.16080/j.issn1671–833x.2019.18.090
  CLC：
- Published：2019
- 稿件说明：
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陈宏飞，张弛，杨光，刘斌，高彦峰，钱凌翼，高栋. YSZ–Ti3SiC2热障涂层及其高温自愈合机制[J]. 航空制造技术, 2019, 62(18): 90-96.

CHEN Hongfei, ZHANG Chi, YANG Guang, LIU Bin, GAO Yanfeng, QIAN Lingyi, GAO Dong. YSZ–Ti3SiC2 Thermal Barrier Coating and Its Self-Healing Mechanism Under High Temperatures. Aeronautical Manufacturing Technology, 2019, 62(18): 90-96.
陈宏飞，张弛，杨光，刘斌，高彦峰，钱凌翼，高栋. YSZ–Ti3SiC2热障涂层及其高温自愈合机制[J]. 航空制造技术, 2019, 62(18): 90-96. DOI： 10.16080/j.issn1671–833x.2019.18.090.

CHEN Hongfei, ZHANG Chi, YANG Guang, LIU Bin, GAO Yanfeng, QIAN Lingyi, GAO Dong. YSZ–Ti3SiC2 Thermal Barrier Coating and Its Self-Healing Mechanism Under High Temperatures. Aeronautical Manufacturing Technology, 2019, 62(18): 90-96. DOI： 10.16080/j.issn1671–833x.2019.18.090.

摘要

采用Ti

SiC

作为新型自愈合剂，利用大气等离子喷涂将混合均匀的YSZ–Ti

SiC

粉体制备成厚涂层。为观测高温下涂层氧化及裂纹的自愈合行为，通过外加载荷的方式在涂层表面预制裂纹，并将样品置于1050℃空气气氛中进行等温热处理。通过分析涂层制备、热处理前后的物相和形貌演变发现：涂层中的部分Ti

SiC

在喷涂后分解为TiC与SiO

，热处理后涂层表面形成外层为TiO

，内层为TiO

和SiO

混合物的双层结构。在自愈合过程中，裂纹内的愈合剂氧化生成SiO

与TiO

，随着扩散控制的氧化反应不断进行，氧化物逐渐积累并填补裂纹。此外，在SiO

与TiO

生成的同时引起的体积膨胀使裂纹周围产生一定的压应力，强化了愈合效果，最终完全愈合裂纹。

Abstract

As a new self-healing agent

SiC

was added into yttria-stabilized zirconia (YSZ) thermal barrier coatings. By atmospheric plasma spraying (APS)

thick coatings were prepared using an YSZ–Ti

SiC

mixing powder. To observe oxidation and self-healing behavior

cracks were prefabricated on the surface of YSZ–Ti

SiC

coating by uniform external load. The prepared samples were then isothermally treated at 1050℃ in air. The phase and morphology evolution of the coatings

as well as the self-healing behavior were investigated

via several analyzing methods. The results showed that a part of Ti

SiC

was decomposed into amorphous SiO

and TiC after spraying and a double layered structure composed of a TiO

outer layer and a TiO

+SiO

inner layer was formed after isothermal treatment. In the process of self-healing

oxidation of the healing agent in the coating led to the growth of silicon oxide and titanium oxide in the cracks. These oxides gradually filled the cracks due to the diffusion-controlled oxidation. Meanwhile

the compressive stress induced by the volume expansion due to SiO

and TiO

growth in the crack enhanced the healing effect. Eventually the prefabricated cracks were healed.

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