[1] Jin Huiming, Zhang Jianfeng, Adriana C.Felix, Majorri H.Aroyave, et al. Oxide/substrate interfacial defects in high temperature oxidationof Co-40Cr by acoustic emission method [J]. Journal of Southeast University (English Edition), 2006, 22 (1): 125-129. [doi:10.3969/j.issn.1003-7985.2006.01.027]
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Oxide/substrate interfacial defects in high temperature oxidationof Co-40Cr by acoustic emission method(
)
声发射方法研究Co-40Cr合金高温氧化过程的膜/基界面缺陷
)Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]
- Volumn:
- 22
- Issue:
- 2006 1
- Page:
- 125-129
- Research Field:
- Materials Sciences and Engineering
- Publishing date:
- 2006-03-20
Info
- Title:
- Oxide/substrate interfacial defects in high temperature oxidationof Co-40Cr by acoustic emission method
- 声发射方法研究Co-40Cr合金高温氧化过程的膜/基界面缺陷
- Author(s):
- Jin Huiming1, Zhang Jianfeng1, Adriana C.Felix2, Majorri H.Aroyave2
-
1College of Mechanical Engineering, Yangzhou University, Yangzhou 225009, China
2 College of Materials Engineering, National University of Antiuquia, Medellin 23715, Colombia
- 靳惠明1, 张剑峰1, Adriana C.Felix2, Majorri H.Aroyave2
- 1扬州大学机械工程学院, 扬州 225009; 2哥伦比亚国立安第克大学材料工程学院, 哥伦比亚麦德林 23715
- Keywords:
- oxidation; acoustic emission; element binding energy; interface; yttrium
- PACS:
- TG174.453
- DOI:
- 10.3969/j.issn.1003-7985.2006.01.027
- Abstract:
- The isothermal oxidation kinetics of a Co-40Cr alloy and its yttrium ion-implanted samples were studied at 1 000 ℃ in air by thermal-gravity analysis(TGA).Scanning electronic microscopy(SEM)was used to examine the Cr2O3 oxide film’s morphology after oxidation.An acoustic emission(AE)method was used in situ to monitor the cracking and spalling of oxide films formed on samples during oxidation and subsequent air-cooling stages.A theoretical model was proposed relating to the film fracture process and was used to analyze the acoustic emission spectrum on time domain and the AE-event number domain.It was found that yttrium implantation remarkably reduced the isothermal oxidation rate of Co-40Cr and improved the anti-cracking and anti-spalling properties of Cr2O3 oxide film.The reasons for the improvement were mainly that the implanted yttrium reduced the grain size of Cr2O3 oxide, increased the high temperature plasticity of oxide film, and remarkably reduced the number and size of Cr2O3/Co-40Cr interfacial defects.
- 用热重分析(TGA)研究了Co-40Cr合金及其离子注钇样品在1 000 ℃空气中的恒温氧化动力学规律.用扫描电镜(SEM)对不同样品表面Cr2O3氧化膜的形貌进行了观测.用声发射(AE)方法对合金表面氧化膜在恒温生长阶段和空冷阶段的开裂与剥落进行了实时监测, 根据相应的氧化膜开裂模型, 对声发射信号在时域和数域上的分布情况进行了分析.结果表明离子注钇降低了Co-40Cr合金的恒温氧化速率, 并提高了合金表面Cr2O3氧化膜的抗开裂和抗剥落性能.离子注钇提高合金抗氧化性能的主要原因在于钇细化了合金表面Cr2O3氧化膜的晶粒, 提高了氧化膜的高温塑性和蠕变能力, 并且显著降低了Cr2O3/Co-40Cr界面缺陷的数量和大小.
References:
[1] Evans A G, Cannon R.Stress and decohesion of oxide scales [J].Materials Science Forum, 1989, 43(3):243-249.
[2] Rahmel A, Schutze M.Mechanical aspects of rare earth effects [J].Oxidation of Metals, 1992, 38(2):314-319.
[3] Jin Huiming, Li Tiefan, Li Meishuan, et al.Influence of yttrium implantation on oxidation behavior of Co-40Cr alloy [J].Journal of Rare Earths, 1999, 17(1):34-38.
[4] Jin Huiming, Chen Rongfa, Zhang Linnan, et al.High temperature oxidation behavior of magnetically sputtered Ni-0.5Y micro-crystal coating [J].Journal of Southeast University: English Edition, 2003, 19(4):364-367.
[5] Zhang Yifan, Shores D, Rahmel A, et al.Spallation of oxide scales formed on Ni-30Cr alloy [J].Oxidation of Metals, 1993, 40(1):529-536.
[6] Jin Huiming, Zhang Linnan, Li Meishuan, et al.Rare earth effects on adhesion of Cr2O3 oxide scale formed on surface of Co-40Cr alloy [J].Journal of Rare Earths, 2001, 19(1):34-39.
[7] Przybilla W, Schutze M.Role of growth stresses on the structure of oxide scales on nickel at 800 and 900 ℃ [J].Oxidation of Metals, 2002, 58(1):103-145.
[8] Ul-Hamid A.Study of the effect of Y on the scale microstructures of Cr2O3- and Al2O3-forming alloys [J].Oxidation of Metals, 2002, 58(1):23-45.
Memo
- Memo:
- Biography: Jin Huiming(1968—), male, doctor, professor, doctorjhm@sohu.com.