为了改善MoSi2力学性能和低温抗氧化性能,选用TiC颗粒来增强补韧MoSi2,通过XRD和SEM表征合成MoSi2基复合材料的微观结构并研究了预氧化对MoSi2基复合材料低温抗氧化性能的影响.结果表明,采用Mo、Si、Ti、C粉末可以自蔓延原位合成20 v01%TiC-MoSi2复合材料.复合材料在500℃氧化240 h增重1.261 mg·cm-2,氧化动力学呈线性关系,生成疏松多孔的氧化层导致"粉化"现象发生.经1200℃预氧化处理,20 v01%TiC-MoSi2复合材料在500℃氧化240 h增重4.83×10-mg·cm-2.预氧化处理后的材料表面形成致密的TiO2和SiO2复合膜抑制了TiC-MoSi2材料出现低温"粉化"现象.
参考文献
| [1] | Vasudevan A K;Petrovic J J .A comparative overview of molybdenum disilicide composites[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,1992,155(1-2):1-17. |
| [2] | Petrovic JJ;Vasudevan AK .Key developments in high temperature silicides[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,1999(1/2):1-5. |
| [3] | P.V. Krakhmalev;E. Strom;C. Li .Microstructure and properties stability of Al-alloyed MoSi_2 matrix composites[J].Intermetallics,2004(2):225-233. |
| [4] | 颜建辉,张厚安,李益民,唐思文.稀土对MoSi2力学性能和抗氧化性能的影响[J].中国稀土学报,2007(04):437-441. |
| [5] | 颜建辉,张厚安,李益民.TiC-TiB2增强MoSi2复合材料的力学性能及抗氧化行为[J].中国有色金属学报,2009(08):1424-1430. |
| [6] | Maruyama T;Yanagihara K .High temperature oxidation and pesting of Mo(Si,AI) 2[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,1997,239-240:828-841. |
| [7] | Yanagihara K;Maruyama T;Nagata K .Effect of third elements on the pesting suppression of Mo-Si-X intermetallics(X=Al,Ta,Ti,Zr and Y)[J].Intermetallics,1996,4(SI):133-139. |
| [8] | Cook J;Khan A;Lee E;Mahapatra R .Oxidation of MoSi2-based composites[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,1992,155(1-2):183-198. |
| [9] | Yuping Z;Xu C N;Watanabe T .The effects of carbon addition on the mechanical properties of MoSi2-TiC composites[J].Ceramics International,2002,28(04):387-392. |
| [10] | Lan Sun;Jinsheng Pan .TiC whisker-reinforced Mo Si_2 matrix composites[J].Materials Letters,2001(3):270-274. |
| [11] | Meng JH;Lu JJ;Wang JB;Yang SR .Preparation and properties of MOSi2 composites reinforced by TiC, TiCN, and TiB2[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2005(1/2):277-284. |
| [12] | Zhu Q.;Zeng Y.;Watanabe T.;Shobu K. .Oxidation behavior of hot-pressed MoSi2-TiC composite[J].Journal of Materials Science,2001(2):313-319. |
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%