Acta Metallurgica Sinica (English Letters) ›› 2011, Vol. 24 ›› Issue (2): 109-117.DOI: 10.11890/1006-7191-112-109

• 研究论文 • 上一篇    下一篇

Evaluation of Interfacial Strength by an Instrumented Indentation Method and Its Application to an Actual TBC Vane

Yasuhiro YAMAZAKI   

  1. Department of Mechanical and Control Engineering, 1719, Fujihashi, Kashiwazaki,Niigata, 945-1195, Japan
  • 收稿日期:2010-12-01 修回日期:2011-02-25 出版日期:2011-04-25 发布日期:2011-04-20
  • 通讯作者: Yasuhiro YAMAZAKI

Evaluation of interfacial strength by an instrumented indentation method and its application to an actual TBC vane

Yasuhiro YAMAZAKI1, Shin-ichiro KUGA2,Toshihiko YOSHIDA2,3   

  1. 1. Department of Mechanical and Control Engineering, 1719, Fujihashi, Kashiwazaki, Niigata, 945-1195,Japan
    2. Department of Advanced Production Systems Engineering, Niigata Institute of Technology, Graduate School, 1719, Fujihashi, Kashiwazaki, Niigata, 945-1195, Japan
    3. Ryodensya Co., 3699-1 Koshin, Nishi-ku, Niiagta, 950-2023, Japan
  • Received:2010-12-01 Revised:2011-02-25 Online:2011-04-25 Published:2011-04-20
  • Contact: Yasuhiro YAMAZAKI

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Abstract: The thermal fatigue behaviour of an air plasma sprayed thermal barrier coating was investigated. And also the interfacial strengths of thermal barrier coated specimens subjected to thermal fatigue, as well as a retired TBC vane were also evaluated by means of an instrumented indentation machine. The results indicated that, (1) the TGO grew at the interface during thermal fatigue cycle as a function of the exposure time at elevated temperature; (2) the microcracks were initiated in the top coating and at the interface after thermal cycle tests; (3) the interfacial strength of TBC, which was evaluated by the indentation method, increased with the thermal cycles; (4) the interfacial strength of the retired TBC vane was almost equal with that of the as-sprayed TBC specimen.

Key words: Thermal barrier coating, Interfacial fracture toughness, Indentation method