通过显微组织观察和力学性能测试,对亚微米Si3N4颗粒强韧化MoSi2的效果及其作用机制进行了初步研究和探讨.结果表明:复合材料中的Si3N4颗粒在基体的间层作用,可抑制MoSi2晶粒长大;断口呈现晶粒细小、裂纹扩展曲折和沿晶与穿晶混合型断裂等特征;Si3N4颗粒通过弥散强化和细化晶粒使复合材料强度提高,室温断裂韧度达到8.2 MPa·m1/2,通过晶粒细化、裂纹偏转和分支、微裂纹形成等机制的综合作用使复合材料增韧.
参考文献
| [1] | Vasudevan A K;Pretrovic J J .A comparative overview of molybdenum disilicide composites[J].Materials Science and Engineering,1992,A155(1-2):1-17. |
| [2] | Petrovic J J .Based high-temperaure structural silicides[J].MRS Bulletin,1993,8(07):35-40. |
| [3] | Mohan G H .Development and characterization of SiC(D:MoSi2-Si3 N4(p)hybrid composites[J].Materials Science and Engineering,1999,A261(1-2):24-37. |
| [4] | Sastry SML.;Jerina KL.;Suryanarayanan R. .CONSOLIDATION AND MECHANICAL PROPERTIES OF MOSI2-BASED MATERIALS[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,1995(0):881-890. |
| [5] | Suzuki Y;Sekino T;Niiham K .Effect of ZrO2 addition on microstructure and mechanical properties of MoSi2[J].Scripta Metallurgica et Materialia,1995,33(01):69-74. |
| [6] | Sun Lan;Pan Jinsheng .Fabrication and characterization of TiC-particle-reinforced MoSi2 composites[J].Journal of the European Ceramic Society,2002,22(05):791-796. |
| [7] | Zhang Houan;Wang Dezhi;Chen Chipping et al.Toughing of MoSi2 doped by La2O3 particles[J].Materials Science and Engineerlng,2003,A345(1-2):118-121. |
| [8] | Inui H;Ito K;Nakamoto T et al.Stacking faults on(001)and their influence on the deflormation and fracture behavior of single crystals of MoSi2-WSiz solid-solutions with the C11b structure[J].Materials Science and Engineering,2001,A34(1-2):31-38. |
| [9] | Qin Ma;Yanqing Yang;Mokuang Kang .Microstructures and mechanical properties of hot-pressed MoSi_2-matrix composites reinforced with SiC and ZrO_2 particles[J].Composites science and technology,2001(7):963-969. |
| [10] | Newman A;Sampath S;Herman H .Processing and properties of MoSi2/SiC and MoSi2/Al2O3[J].Materials Science and Engineering,1999,A261(1-2):252-260. |
| [11] | Yamada K;Kamiya N .High temperature mechanical properties of Si3N4-MoSi2 and Si3N4-SiC composites with network structures of second phases[J].Materials Science and Engineering,1999,A261(1-2):270-277. |
| [12] | Robert W K;Mohan G H .Cyclic oxidation study of MoSi2Si3N4 base composites[J].Materials Science and Engineering,1999,A261(1-2):300-303. |
| [13] | 王学成;柴惠芬;王笑天 .燃烧合成MoSi2的组织结构特征分析[J].中国有色金属学报,1995,5(02):103-107. |
| [14] | Gang Wang;Wan Jiang;Guangzhao Bai .Si_3N_4 rodlike crystal-reinforced MoSi_2 matrix composites[J].Materials Letters,2004(3/4):308-311. |
| [15] | 马勤,杨延清,康沫狂.压痕法测定热压MoSi2基复合材料K1C值的研究[J].稀有金属材料与工程,1996(02):30-32. |
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