| 纳米Ni-20Fe 颗粒增韧Al2O3复合材料的力学性能与磁性能 |
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| 引用本文： | 李合琴,何晓雄,曹闰,秦晓英.纳米Ni-20Fe 颗粒增韧Al2O3复合材料的力学性能与磁性能[J].复合材料学报,2006,23(3):103-107. |
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| 作者姓名： | 李合琴 何晓雄 曹闰 秦晓英 |
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| 作者单位： | 1.合肥工业大学材料科学与工程学院, 合肥230009 ; |
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| 基金项目： | 中国科学院"百人计划"，安徽省自然科学基金 |
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| 摘 要： | 用机械化学及热压烧结方法成功制备了高致密Ni-20Fe/ Al2O3 纳米复合材料。通过X2ray、FE-SEM、力学性能、磁性能测试, 结果表明, 复合后材料断裂韧性从纯α2Al2O3 相的4. 7 MPa·m1/2 提高到6. 2 MPa·m1/2(19 % (Ni-20Fe) / Al2O3 ) , 断裂方式有沿晶断裂和穿晶断裂两种。当Ni-20Fe 合金的体积百分数达到19 %时, 复合材料的饱和磁化强度达33 emu/ g , 矫顽力为200 Oe , 且在低于500 ℃的情况下, 矫顽力基本不随温度而变, 具有良好的磁热稳定性。
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| 关 键 词： | 纳米复合材料 氧化铝 Ni-20Fe 合金 饱和磁化强度 机械性能 |
| 文章编号： | 1000-3851（2006）03-0103-05 |
| 收稿时间： | 07 4 2005 12:00AM |
| 修稿时间： | 2005-07-042005-10-31 |
Mechanical and magnetic properties of nano-Ni-20Fe tougheningalumina2based nanocomposites |
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| LI Heqin,HE Xiaoxiong,CAO Run,QIN Xiaoying.Mechanical and magnetic properties of nano-Ni-20Fe tougheningalumina2based nanocomposites[J].Acta Materiae Compositae Sinica,2006,23(3):103-107. |
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| Authors: | LI Heqin HE Xiaoxiong CAO Run QIN Xiaoying |
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| Affiliation: | 1.School of Materials Science &|Engineering| Hefei University of Technology| Hefei 230009| China ;2.Institute of Solid State Physics| Chinese Academy of Science| Hefei 230031| China) |
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| Abstract: | Ni-20Fe/ Al2O3 nanocomposites with high relative density (D ≥98 %) were fabricated using the mechanochemical method and the hot-pressing process. The fracture toughness is increased f rom 4. 7 to 6. 2 MPa·m1/2 asNi-20Fe volume f raction increases f rom 0 to 19 %. Both the intergranular and the t ransgranular f ractures areobserved on the f racture surface by FE-SEM. When 19 % Ni-20Fe is added , the composite Ms is 33 emu/ g , Hc is200 Oe , and Hc keep s constant below 500 ℃, which shows good magnetic heat stability. |
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| Keywords: | nanocomposites alumina Ni-20Fe alloy saturation magnetization mechanical properties |
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