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
• 负责人: MUTOH Yoshiharu
• 金额: $ 4.86万
• 依托单位: Nagaoka University of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-06452147/
• 关键词: Functionally graded thermal barrier coatings; Protective coatings,; Thermal cycling,; Aluminide coating,; Interface; High Temperature fatigue strength; Crack,; 傾斜機能材; 疲労試験装置の開発; 遮熱コーティング材; 耐食コーティング材; アルミナイドコート; 熱サイクル; 疲労強度; 傾斜機能コーティング; セラミッ

Surface modification techniques, such as thermal barrier coatings and protective coatings are key technology to develop next generation advanced gas turbines. As a part of program to develop the high performance coating systems for advanced gas turbines, the high temperature strength of the advanced materials with surface modifications has been studied in this research program. The conclusions obtained are summarized as follows :(1) A new fatigue test machine which can simulate the service condition of turbine blades and vanes was successfully produced.(2) Thermal fatigue tests of conventional two-layr NFGM coating specimens and a functionally gradient material (FGM) coating specimens were carried out. Damage process of the functionally graded thermal barrier coatings during the thermal cycling was qualified. The degradation of thermal barrier function of the FGM was also qualified.(3) The effect of the functionally graded thermal barrier coatings on the thermal fatigue strength of the … More advanced materials with ceramic coatings surface damage strength was quantitatively evaluated by the thermal cycling test in vacuum.(4) The fatigue fracture of the Ni-base superalloy, IN 738LC,coated with the so-called M-Cr-Al-Y alloys by low pressure plasma spraying was studied and clarified at high temperature in vacuum condition, compared with that of the substrate alloy, IN 738LC.The fatigue crack propagation process was also made clear from the investigation employing the special equipment with cyclic loading stages which fit within the scanning electron microscope. Special focus was paod on the fatigue crack growth behavior in the coated layr and the dependence of the MCrAlY alloy systems, as well as near the interface.(5) The effect of aluminide coating on the high-cycle fatigue strengths of Ni-base superalloys was clarified at room temperature and 800 ﾟC in vacuum, in comparison with those of the substrates. Based on the measurement of a critical strain above which brittle cracking appeared at the aluminide coating, a simple method which can provide a reasonable estimation corresponding with the experimental life, was proposed. Less

热障涂层和防护涂层等表面改性技术是发展下一代先进燃气轮机的关键技术。作为先进燃气轮机用高性能涂层系统开发计划的一部分，本研究计划对表面改性的先进材料的高温强度进行了研究。（1）研制成功了一种能够模拟涡轮机叶片工作状态的新型疲劳试验机。(2)进行了常规双层NFGM涂层试样和功能梯度材料（FGM）涂层试样的热疲劳试验。对梯度功能热障涂层在热循环过程中的损伤过程进行了定性分析。还鉴定了FGM的热障功能的退化。(3)研究了功能梯度热障涂层对热疲劳强度的影响。 ...更多信息 通过真空热循环试验定量评价了陶瓷涂层先进材料的表面损伤强度。(4)研究了低压等离子喷涂M-Cr-Al-Y合金涂层的镍基高温合金IN 738 LC在高温真空条件下的疲劳断裂，并与基体合金进行了比较。在扫描电子显微镜（SEM）下，利用具有循环加载阶段的专用试验装置，对疲劳裂纹扩展过程进行了研究显微镜重点研究了涂层内疲劳裂纹扩展行为和MCrAlY合金系间的依赖关系，以及界面附近的疲劳裂纹扩展行为。(5)在室温和800 ℃真空条件下，通过与基体的对比，阐明了铝化物涂层对镍基高温合金高周疲劳强度的影响。基于对铝化物涂层发生脆裂的临界应变的测量，提出了一种简单的估算方法，该方法能够合理地估算出与实验寿命相对应的寿命。少

项目成果

貞末照輝、岡崎正和、武藤睦治、伊藤義康、斉藤正弘,: "高温耐食コーティング材の疲労破壊過程の力学的検討、" 日本材料学会第33回高温強度シンポジウム前刷. 26-30 (1995)

Teruteru Sadasue、Masakazu Okazaki、Mutsuji Muto、Yoshiyasu Ito、Masahiro Saito，：“高温耐腐蚀涂层材料的疲劳断裂过程的力学研究”，日本材料学会第 33 届高温强度研讨会预印本。 (1995))

武藤睦治,大木基史,高橋雅士,: "セラミックコーティング材のしゃ熱特性に及ぼす熱サイクルの影響," 溶接構造シンポジウム'95. 45-50 (1995)

Mutsuji Muto、Motofumi Ohki、Masashi Takahashi：“热循环对陶瓷涂层材料隔热性能的影响”，焊接结构研讨会 95（1995 年）。

M.OHKI,Y.MUTOH,T.HIGASHIWADA,S.ADACHI., M.TAKAHASHI: "Thermal Fatigue Damage of Functionally Graded Thermal Barrier Coatings in Vacuum" J.Soc. Mat. Sci., Japan, (in Japanese). (in Press). (1997)

M.OHKI、Y.MUTOH、T.HIGASHIWADA、S.ADACHI.、M.TAKAHASHI：“真空中功能梯度热障涂层的热疲劳损伤”J.Soc。

大木基史,武藤睦治,岡田浩和,高橋雅士,: "熱サイクルを受けたセラミックしゃ熱コーティングのしゃ熱特性," 溶接学会平成8年度秋季全国大会講演会. 183-184 (1996)

Motofumi Ohki、Mutsuji Muto、Hirokazu Okada、Masashi Takahashi：“热循环下陶瓷绝缘涂层的隔热性能”，日本焊接学会 1996 年秋季全国会议讲座 183-184 (1996)。

貞末照輝、岡崎正和、武藤睦治、伊藤義康、斉藤正弘,: "高温耐食コーティング材の疲労破壊過程のその場観察、" 日本機械学会第73期講演会前刷. 95-10. 198-199 (1995)

Teruteru Sadasue、Masakazu Okazaki、Mutsuji Muto、Yoshiyasu Ito、Masahiro Saito，：“高温耐腐蚀涂层材料疲劳断裂过程的现场观察”，日本机械工程学会第 73 届年会预印本 95-10。 198-199 (1995)