通过热压烧结工艺制得了(SiCp+C)/MoSi2复合材料,分析了材料的组织结构、室温和高温力学性能.结果表明:(SiCp+C)/MoSi2复合材料主要由MoSi2(大量)、a-SiCp(大量)、Mo5Si3(多量)和β-SiC(少量)组成,密度为5.12 g/cm3,相对密度为91%;增强相的粒径＜30μm,体积分数为39%.材料室温硬度、抗弯强度和断裂韧性分别为12.2GPa,530MPa和7.2MPa@m1/2;在800℃的维氏硬度为8.0GPa,1 200℃和1400℃的抗压强度分别为560 MPa和160 MPa.与非增强MoSi2相比,材料的各种力学性能都有大幅度的提高.
参考文献
| [1] | 王德志,刘心宇,左铁镛,成钧,钱介文.球磨条件对MoSi2形成的影响[J].中国有色金属学报,1998(04):600-604. |
| [2] | Vasudevan A K;Petrovic J J .A comparative overview of molybdenum disilicide composites[J].Materials Science and Engineering,1992,A155:1-17. |
| [3] | Wiedemeier H;Singh M .Thermochemical modelling of interfacial reactions in molybdenum disilicide matrix composites[J].Journal of Materials Science,1992,27:2974-2978. |
| [4] | Subrahmanyam J;Mohan R R .Combustion synthesis of MoSi2-WSi2 alloys[J].Materials Science and Engineering,1994,A183:205-210. |
| [5] | Alman D E;shaw K G;Stoloff N S et al.Fabrication,structure and properties of MoSi2-base composites[J].Materials Science and Engineering,1992,A155:85-93. |
| [6] | Schwarz R B;Srinivasan S R;Petrovic J J et al.Synthesis of molybdenum disilicide by mechanical alloying[J].Materials Science and Engineering,1992,A155:75-83. |
| [7] | Castro R G;Smith R W;Rollett A D et al.Ductile phase toughening of molybdenum disilicide by low pressure plasma spraying[J].Materials Science and Engineering,1992,A155:101-107. |
| [8] | 金燕苹 .SiC晶须强韧化MoSi2复合材料[J].中国材料研究学报,1994,8(02):183-187. |
| [9] | Ebrahimi F;Aragao B G J .Evaluation of fracture toughness of duplex microstructures by an indentation technique[J].Materials Science and Engineering,1994,A177:7-10. |
| [10] | 关振铎.无机材料物理性能[M].北京:清华大学出版社,1992:38-106. |
| [11] | Cook J;Khan A;Lee E et al.Oxidation of MoSi2based composites[J].Materials Science and Engineering,1992,A155:183-198. |
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%