Fatigue crack growth behavior of interface crack in thermal barrier coating

热障涂层界面裂纹的疲劳裂纹扩展行为

基本信息

  • 批准号:
    10650077
  • 负责人:
  • 金额:
    $ 0.77万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
  • 财政年份:
    1998
  • 资助国家:
    日本
  • 起止时间:
    1998 至 1999
  • 项目状态:
    已结题

项目摘要

(1) Thermal barrier coated samples with Co-base super alloy substrate, NiCoCrAlY bond coat and 8wt%Y2O3-ZrO2 top coat were prepared.(2) In order to perform a test of fatigue crack growth along interface between metal bond coat layer and ceramic top coat layer, a special jigs and specimens with starter notch introduced by EDM were developed.(3) An interface crack could be successfully introduced ahead of the notch and it propagated along interface region with coalescing to inherent pores.(4) Based on the results of BEM analysis, A crack along the interface between top coat and bond coat layers propagates under mixed mode conditions of mode I and mode II and mix mode ratio varies with crack extension.(5) The crack growth behavior along the interface of dissimilar materials is controlled by the parameter Ki, while it under mix mode in homogeneous materials is controlled by the parameter K θ max.(6) With increasing porosity of the top coat, Young's modulus decreases and hence K-value also decreases. However, since crack growth resistance also decreases, there will be the optimum porosity.
(1)制备了以钴基高温合金为基体、NiCoCrAlY粘结层和8wt%Y2O3-ZrO 2表面涂层的热障涂层试样。(2)为了进行金属粘结层与陶瓷面层沿着界面的疲劳裂纹扩展试验,研制了电火花加工引入起始缺口的专用夹具和试件。(3)界面裂纹可以成功地引入到缺口的前面,并且它沿着界面区域扩展,并合并到固有的孔隙中。(4)基于边界元分析结果,裂纹沿着面层与粘结层界面在I型和II型混合模式条件下扩展,混合模式比随裂纹扩展而变化。(5)异种材料界面处的裂纹沿着扩展行为受参数Ki控制,而均质材料混合模式下的裂纹扩展行为受参数K θ max控制。(6)随着顶涂层孔隙率的增加,杨氏模量降低,因此K值也降低。然而,由于裂纹扩展阻力也降低,因此将存在最佳孔隙率。

项目成果

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MUTOH Yoshiharu其他文献

Effects of Adhesives on Evaluation Method of Interfacial Strength of Plasma‐Sprayed HAp Coating
粘合剂对等离子喷涂HAp涂层界面强度评价方法的影响
  • DOI:
  • 发表时间:
    2017
  • 期刊:
  • 影响因子:
    0
  • 作者:
    OTSUKA Yuichi,HIRAKU Yoshihisa;HAKOZAKI Yuki, MIYASHITA Yukio;MUTOH Yoshiharu
  • 通讯作者:
    MUTOH Yoshiharu

MUTOH Yoshiharu的其他文献

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{{ truncateString('MUTOH Yoshiharu', 18)}}的其他基金

Development of a Method for Fretting Fatigue Life Prediction with Taking Account of Wear based on in-situ Observation of Fretting Wear and Fatigue Processes
基于微动磨损和疲劳过程的现场观察,开发考虑磨损的微动疲劳寿命预测方法
  • 批准号:
    21360052
  • 财政年份:
    2009
  • 资助金额:
    $ 0.77万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Laser Cutting of Functional Materials by Twin Laser Beam and Thermal Stress Analysis
双激光束激光切割功能材料和热应力分析
  • 批准号:
    16360050
  • 财政年份:
    2004
  • 资助金额:
    $ 0.77万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Development of thermo conductive analysis simulation in order to aid laser welding of dissimilar metals
开发热传导分析模拟以辅助异种金属的激光焊接
  • 批准号:
    13650774
  • 财政年份:
    2001
  • 资助金额:
    $ 0.77万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Development of a System for Analysing Damage Mechanism of Coatings in Scratch Test
涂层划痕试验损伤机理分析系统的开发
  • 批准号:
    07555619
  • 财政年份:
    1995
  • 资助金额:
    $ 0.77万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Fatigue Strength of Functionally Graded Thermal Barrier Ceramic Coatings Subjected to Thermal Cycling under Gradient Temperature
梯度温度下热循环功能梯度热障陶瓷涂层的疲劳强度
  • 批准号:
    06452147
  • 财政年份:
    1994
  • 资助金额:
    $ 0.77万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
High Temperature Fretting Fatigue Properties of Silicon Nitride
氮化硅的高温微动疲劳性能
  • 批准号:
    04650062
  • 财政年份:
    1992
  • 资助金额:
    $ 0.77万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)
High Temperature Fatigue Crack Growth in Silicon Nitride and Role of SCC.
氮化硅中的高温疲劳裂纹扩展和 SCC 的作用。
  • 批准号:
    02650054
  • 财政年份:
    1990
  • 资助金额:
    $ 0.77万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)
High Temperature Fretting Fatigue of Turbine Steels Under Variable Loading Simulating Practical Operation
模拟实际运行变载荷下汽轮机钢的高温微动疲劳
  • 批准号:
    62550053
  • 财政年份:
    1987
  • 资助金额:
    $ 0.77万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)
Fracture toughness of ceramics at elevated temperature and metallurgical factors for controlling the toughness
陶瓷高温断裂韧性及控制韧性的冶金因素
  • 批准号:
    60550048
  • 财政年份:
    1985
  • 资助金额:
    $ 0.77万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)

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钛 64 冷驻疲劳载荷 - 应力集中和疲劳裂纹扩展速率的影响
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