| 纳米ZrO_2颗粒强韧MoSi_2基复合材料 |
| |
| 引用本文： | 马勤,阎秉钧,许广济,郝远,王焕琴,康沫狂,杨延清,孟国文. 纳米ZrO_2颗粒强韧MoSi_2基复合材料[J]. 兰州理工大学学报, 1996, 0(1) |
| |
| 作者姓名： | 马勤 阎秉钧 许广济 郝远 王焕琴 康沫狂 杨延清 孟国文 |
| |
| 作者单位： | 甘肃工业大学机械工程一系，西北工业大学 |
| |
| 基金项目： | 甘肃工业大学,西北工业大学的联合资助 |
| |
| 摘 要： | 研究了热压纳米ＺｒＯ２粒子强韧ＭｏＳｉ２基复合材料的显微结构与力学性能，初步探讨了纳米ＺｒＯ２粒子的增韧补强机制．结果表明，复合材料的室温断裂韧性有了较大的提高，ＫＩｃ达到５．７９ＭＰａ·ｍ１／２．ＳＥＭ观察表明纳米ＺｒＯ２粒子既分布于基体材料的晶界同时也存在于晶粒内部，断口形貌呈现出沿晶与穿晶的混合型断裂特征．复合材料的韧化效应是由ＺｒＯ２粒子引起的相变韧化、晶粒桥接以及裂纹偏转等机制的综合作用．
|
| 关 键 词： | 复合材料，MoSi2，ZrO2，相变增韧，显微组织，力学性能 |
ZrO_2 nanometer size particles reinforced MoSi_2 composites |
| |
| Ma Qin, Yan Binjun, Xu Guangji, Hao Yuan, Wang Huanqin. ZrO_2 nanometer size particles reinforced MoSi_2 composites[J]. Journal of Lanzhou University of Technology, 1996, 0(1) |
| |
| Authors: | Ma Qin Yan Binjun Xu Guangji Hao Yuan Wang Huanqin |
| |
| Abstract: | The microstructure and mechanical properties of MoSi2-based composites reinforced by the ZrO2 particles with nanometer size reinforced are investigated, and thestrengthening-toughening mechanism of the materials is also revealed. It is shown that theroom temperature indentation fracture toughness reached 5. 79 MPa. m1/2. SEM reveals thatthe ZrO2 particles are not only distributed over the grain boundaries but are also dispersed inside grains, and the fracture takes the forms of intergranular and transgranular mixed failure. It was thought that the toughening mechanism of the composites is a synthetic effect ofthe ZrO2 phase transformation toughening, grain bridging, crack deflection and crackbranching. |
| |
| Keywords: | composite MoSi2 ZrO2 phase-change toughening microstructure mechanical property |
| 本文献已被 CNKI 等数据库收录！ |
|
