Improvement of Oxidation and Delamination Resistant Properties in Thermal Barrier Coatings by Means of Plasma Thermal Spraying

通过等离子热喷涂提高热障涂层的抗氧化和抗分层性能

• 批准号: 13450041
• 负责人: SHOJI Tetsuo
• 金额: $ 9.66万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13450041/
• 关键词: Thermal Barrier Coating(TBC); Thermally Grown Oxide (TGO); Bond coating; Cerium (Ce); Silicon (Si); Four Point Bending; Laser remelting; 熱遮へいコーティング

We suggested that degradation of thermal barrier coating (TBC) was induced by thermal stress due to formation and growth of thermally grown oxide (TGO) in YSZ top coat and MCrAlY bond coat, and by the decrease in bonding strength due to formation of many pores in TGO. In order to inhibit of formation of pores in TGO, an improvement of chemical composition of bond coat material was considered. Ce and Si added MCrAlY bond coat material was developed. As a result, morphology of the TGO changed drastically, namely TGO grew up from the interior of the bond coat like wooden root (wedge shaped TGO). Furthermore, the developed material also inhibited the growth of nickel and cobalt oxides, which have bad influence on formation of pores. And four point bending test was carried out to evaluated the interface strength. The strain of developed bond coat material used for TBC was three times higher than conventional one. Accordingly, the improvement of delamination resistant property using the developed bond coat material was successful.Also, a technique of laser remelting to a bond coat was developed to improve the oxidation resistant property. An objective of laser remelting is to produce a dense and less impure TGO. As a result, if conventional bond material (MCrAlY) was used, TGO thickness decreased and dense alumina formed. Moreover, laser remetled TBC was found to have stronger bending strength than the standard TBC, probably due to disappearance of pores in TGO.The improvement of oxidation and delamination resistant properties was succeeded by means of modification of bond coat material and usage of laser remelting technique.

我们认为，热障涂层（TBC）的退化是由热应力引起的热生长氧化物（TGO）的形成和生长的YSZ顶涂层和MCrAlY粘结层，并通过在结合强度下降，由于在TGO中形成许多孔隙。为了抑制TGO中孔隙的形成，考虑改进粘结涂层材料的化学组成。研制了添加Ce和Si的MCrAlY粘结涂层材料。其结果是，TGO的形态发生了急剧变化，即TGO从粘结层的内部像树根一样生长（楔形TGO）。此外，所开发的材料还抑制了镍和钴氧化物的生长，这对孔的形成有不良影响。并通过四点弯曲试验对界面强度进行了评价。开发的粘结层材料用于TBC的应变是传统粘结层材料的三倍。因此，使用开发的粘结涂层材料的抗分层性能的改善是成功的。此外，激光重熔粘结涂层的技术，以提高抗氧化性能的开发。激光重熔的目的是产生致密且不纯的TGO。结果，如果使用常规粘结材料（MCrAlY），则TGO厚度减小并且形成致密氧化铝。通过对粘结层材料的改性和激光重熔技术的应用，提高了热障涂层的抗氧化和抗分层性能。

项目成果

加藤俊樹, 小川和洋, 庄子哲雄: "耐はく離性に優れた熱遮へいコーティングの開発"溶射. 39巻・2号. 275-280 (2002)

Toshiki Kato、Kazuhiro Okawa、Tetsuo Shoko：“具有优异抗剥落性的热屏蔽涂层的开发”热喷涂，第 39 卷，第 275-280 期。

Kazuhiro Ogawa, Takeshi Masuda, Tetsuo Shouji: "Kinetics of Thcrmally Grown Oxidc at Interface Between Thermal Barrier Coating and MCrAlY Bond Coatings"Proceedings of the International Thermal Spray Conference 2001. 187-194 (2001)

Kazuhiro Okawa、Takeshi Masuda、Tetsuo Shouji：“热障涂层和 MCrAlY 粘结涂层界面处热生长氧化物的动力学”2001 年国际热喷涂会议记录。187-194 (2001)

小川和洋: "YSZ/MCrAlYCeSi熱遮へいコーティングの高温酸化挙動"溶射技術. 22巻・2号. 37-44 (2002)

Kazuhiro Okawa：“YSZ/MCrAlYCeSi 热屏蔽涂层的高温氧化行为”《热喷涂技术》第 22 卷，第 2. 37-44 期（2002 年）。

T.Sato, O.P.Solonenko, H.Nishiyama: "Optimization for Plasma Spraying Processes by Numerical Simulation"Thin Solid Films. Vol.40,No.1. 54-59 (2002)

T.Sato、O.P.Solonenko、H.Nishiyama：“通过数值模拟优化等离子喷涂工艺”固体薄膜。

T.Sato, O.P.Solonenko, H.Nishiyama: "Optimization for Plasma Spraying Processes by Numerical Simulation"Thin Solid Films. Vol.40, No.1. 54-59 (2002)

T.Sato、O.P.Solonenko、H.Nishiyama：“通过数值模拟优化等离子喷涂工艺”固体薄膜。