研究了热障涂层的热震失效，认为涂层热震失效的本质为应力疲劳失效．建立了涂层热震失效寿命理论计算公式，并用实验结果对公式进行了验证，证明公式能很好地拟合实验结果．提出了评价涂层抗热震性能的指标-临界热震温差范围△Tc．该工作为估算涂层寿命及减少实验工作量提供了理论依据．
The thermal shock failure life of thermal barrier coatings (TBCs) was studied. A mathematical model of thermal shock failure and
theoretical calculation formula of the coatings’ thermal shock failure life were established. It is shown that the thermal shock failure mechanism of
coatings is thermal stress fatigue destruction and that the formula accords well with the test results. The critical temperature range Δ Tc
in thermal schok can be used to evaluate the coating’s resistance to thermal cycling. This work provides a theoretical basis for evaluating
the coating’s lifetime and reducing test work.
参考文献
| [1] | Miller R A, Lowell C E. Thin Solid Films. 1982, 95: 256--273 2 Stecura S. Thin Solid Films. 1980, 73: 481--489 3 Pekshev P, Tcherniakov S V. Surface and Coatings Technology, 1994, 64: 5--9 4 Kishitake K, et al. Journal of Thermal Spray Technology, 1995, 4 (4): 353--357 5 Mcdonald G, Hendricks R C. Thin Solid Films. 1980, 73: 491--496 6 Haynes J A, et al. Surface and Coatings Technology. 1996, 86-87: 102--108 7 Wu B C, Chang E. Thin solid films. 1989, 172: 185--196 8 Zheng Q X, et al. Eng. Fract. Mech., 1996, 53 (1): 49--55 9 郑修麟. 金属疲劳的定量理论. 西安: 西北工业大学出版社, 1994. 34 10 杨德保. 工科概率统计. 北京: 北京理工大学出版社, 1994. 327 |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%