Hot Corrosion Behavior of Typical Bond Coats in Thermal Barrier Coatings Systems

YANG Yingfei; REN Pan; BAO Zebin

doi:10.16080/j.issn1671-833x.2020.14.041

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Hot Corrosion Behavior of Typical Bond Coats in Thermal Barrier Coatings Systems

更新时间：2025-10-30

- Hot Corrosion Behavior of Typical Bond Coats in Thermal Barrier Coatings Systems
- Aeronautical Manufacturing Technology Vol. 63, Issue 14, Pages: 41-47(2020)
- 作者机构：
  
  1. 国防科技大学智能科学学院,长沙,410073
  2. 装备综合保障国防科技重点实验室,长沙,410073
- 作者简介：
- 基金信息：
- DOI：10.16080/j.issn1671-833x.2020.14.041
  CLC：
- Published：2020
- 稿件说明：
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陈棣湘，任远，王伟 . 热障涂层电磁/电容复合检测技术研究[J]. 航空制造技术, 2020, 63(14): 41-47.

YANG Yingfei, REN Pan, BAO Zebin, DENG Chunming, LI Wei. Hot Corrosion Behavior of Typical Bond Coats in Thermal Barrier Coatings Systems. Aeronautical Manufacturing Technology, 2020, 63(14): 41-47.
陈棣湘，任远，王伟 . 热障涂层电磁/电容复合检测技术研究[J]. 航空制造技术, 2020, 63(14): 41-47. DOI： 10.16080/j.issn1671-833x.2020.14.041.

YANG Yingfei, REN Pan, BAO Zebin, DENG Chunming, LI Wei. Hot Corrosion Behavior of Typical Bond Coats in Thermal Barrier Coatings Systems. Aeronautical Manufacturing Technology, 2020, 63(14): 41-47. DOI： 10.16080/j.issn1671-833x.2020.14.041.

摘要

热障涂层能显著提升发动机叶片的耐高温能力，但由于其工作环境恶劣，容易发生裂纹、烧结、界面开裂、涂层脱落等失效现象。针对单一检测手段获取的信息量有限、难以实现热障涂层全面准确评估的现状，根据电磁法适合检测导电材料、电容法适合检测非导电材料的特点，提出了热障涂层电磁 / 电容复合检测技术，研究了所涉及的检测机理、复合式传感器设计以及涂层参数检测等关键问题。仿真和试验结果表明：传感器电磁检测单元和电容检测单元对涂层厚度的最大检测灵敏度分别达到 0.1Ω/mm 和 15pF/mm，为涂层厚度及介电常数、电导率等参数的定量检测奠定了基础，为热障涂层全面准确的评估提供了有效的解决方案。

Abstract

In order to investigate the hot corrosion behavior of the commonly-used bond coats for thermal barrier coating system

four typical bond coats (i.e.

plain NiAl coating

NiCoCrAlY coating

Pt modified NiAl coating and Pt+Hf co-modified NiAl coating) were comparably evaluated in the mixed salts of Na2SO4/NaCl (mass fraction 75%∶25%) at 900℃. The phase constitution evolution and microstructure change during hot corrosion were analyzed by scanning electron microscope (SEM)

electron probe micro-analyzer (EPMA) and X–ray diffractometer (XRD). The results showed that plain NiAl coating degrades fastest during hot corrosion test. In contrast

the degradation rate of NiCoCrAlY coating is slower. The hot corrosion resistance of the two modified NiAl coatings is satisfactory

Pt modified NiAl is the best among the four coatings. It seems that the addition of Hf does not benefit the hot corrosion resistance of Pt–Al coating.

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