用压入法测试了电子束物理气相沉积热障涂层在1100℃等温氧化过程中的界面韧性,该热障涂层体系的界面韧性(Гi)在38～45J/m2之间.在等温暴露过程中,界面韧性Гi变化较小;但由于TGO增厚引起涂层的弹性应变能(G0)快速增长,使得归一化的界面韧性(Гi/G0)随暴露时间而急剧降低,逐渐趋于1.结果表明,粘结层的热生长氧化物(TGO) 的增厚是热障涂层失效的一个重要原因.
参考文献
| [1] | BEELE W;CZECH N·;SCHULENBERG T· .Thermal barrier coatings:advancing efficiency[J].MPS Review,1997,8:19-20. |
| [2] | Nitin P. Padture;Maurice Gell;Eric H. Jordan .Thermal Barrier Coatings for Gas-Turbine Engine Applications[J].Science,2002(5566):280-284. |
| [3] | A. G. Evans;D. R. Mumm;J. W. Hutchinson;G. H. Meier;F. S. Pettit .Mechanisms controlling the durability of thermal barrier coatings[J].Progress in materials science,2001(5):505-553. |
| [4] | DRORY M D;HUTCHINSON J W .Measurement of the adhesion of a brittle film on a ductile substrate by indentation[J].Proceedings of the Royal Society A:Mathematical,Physical & Engineering Sciences,1996,452:2319-2341. |
| [5] | Begley M. R.;Mumm D. R. .ANALYSIS OF A WEDGE IMPRESSION TEST FOR MEASURING THE INTERFACE TOUGHNESS BETWEEN FILMS/COATINGS AND DUCTILE SUBSTRATES[J].Acta materialia,2000(12):3211-3220. |
| [6] | Aditad Vasinonta;Jack L. Beuth .Measurement of interfacial toughness in thermal barrier coating Systems by indentation[J].Engineering Fracture Mechanics,2001(7):843-860. |
| [7] | J.A. Haynes;M.K. Ferber .Mechanical properties and fracture behavior of interfacial alumina scales on plasma-sprayed thermal barrier coatings[J].Materials at High Temperatures,1999(2):49-69. |
| [8] | HAN Y F;XING Z P;CHATURVEDI M C .Oxidation resistance and microstructure of Ni Cr Al Y coating on Ni3Al based alloy[J].Materials Science and Engineering,1997,A239-240:871-876. |
| [9] | MUMM D R;EVANS A G .On the role of imperfections in the failure of a thermal barrier coating made by EB PVD[J].Acta Materialia,2000,48:1815-1827. |
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%