分别采用两步包埋渗法和包埋共渗法在铌硅化物基合金表面制备了Al改性硅化物抗氧化涂层.两步包埋渗法是先在合金表面包埋渗Si制备(Nb,X)Si2(X表示Ti,Cr和Hf元素)涂层,然后再将渗Si试样于800～1000℃包埋渗Al.结果表明:当渗Al温度达到860℃时渗入(Nb,X)Si2层中的Al可形成(Nb,Ti)3Si5Al2相;当渗Al温度达到900℃时渗入的Al还可穿过(Nb,X)Si2层在渗Si层与基体之间形成(Nb,Ti)(Al,Si)3层.经1150℃/20h Si-Al包埋共渗后在合金表面形成的涂层具有多层复合结构:外层主要由(Nb,Ti)3Si5Al2和(Nb,Ti)(Al,Si)3组成;中间层上部为(Nb,X)Si2,下部为低硅化物(Nb,X)5Si3;内层由基体相(Nb,Ti)Al3和柱状晶(Cr,Al)2(Nb,Ti)组成.
参考文献
| [1] | Bewlay B P;Jackson M R;Zhao J C et al.A review of very-hightemperature Nb-silicide-based composites[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,2003,34A:2003-2043. |
| [2] | J.R. Nicholls .Advances in Coating Design for High-Performance Gas Turbines[J].MRS bulletin,2003(9):659-670. |
| [3] | 赵陆翔,郭喜平.铌基合金抗高温氧化研究进展[J].材料导报,2006(07):61-64. |
| [4] | 王禹,郜嘉平,李云鹏,胡行方.铌合金硅化物涂层的结构及高温抗氧化性[J].无机材料学报,2000(01):143-149. |
| [5] | Murakami T;Sasaki S;Ichikawa K;Kitahara.A .Oxidation risitance of powder compacts of the Nb-Si-Cr system and Nb3Si5 Al2 matrix compacts prepared by spark plasma sintering[J].Intermetallics,2001,9:629-635. |
| [6] | Xiang ZD.;Datta PK. .Deposition of silicon modified aluminide coatings on nickel base superalloys by pack cementation process[J].Materials Science and Technology: MST: A publication of the Institute of Metals,2003(7):935-942. |
| [7] | Xiang ZD.;Rose SR.;Burnell-Gray JS.;Datta PK. .Co-deposition of aluminide and silicide coatings on gamma-TiAl by pack cementation process[J].Journal of Materials Science,2003(1):19-28. |
| [8] | 肖来荣,蔡志刚,易丹青,向彩文,许谅亮.MOSi2涂层的组织结构与高温抗氧化性能[J].中国有色金属学报,2006(06):1028-1033. |
| [9] | Hellwig A;Palm M;Inden G .Phase equilibria in the Al-Nb-Ti system at high temperatures[J].Intermetallics,1998,6:79-94. |
| [10] | Kamal Mahdouk;Jean-Claude Gachon .A thermodynamic study of the Al-Cr-Nb ternary system[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2001(2):232-236. |
| [11] | J.-C. Zhao;M.R. Jackson;L.A. Peluso .Evaluation of Phase Relations in the Nb-Cr-Al System at 1000 deg C Using a Diffusion-Multiple Approach[J].Journal of Phase Equilibria and Diffusion,2004(2):152-159. |
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%