以热压烧结的方法制备了Al2O3/Ni金属陶瓷,探讨了Al2O3/Ni金属陶瓷显微结构、力学性能及微波介电性能随Ni粒子含量变化的规律.结果表明,在垂直于压力方向上,Ni粒子有明显的受压拉伸现象;当Ni粒子含量从5%(体积分数)增加至20%(体积分数)时,金属陶瓷中Ni粒子的分布由孤立向部分桥连方式转变.随Ni粒子含量的增加,金属陶瓷致密度略有下降,抗弯强度明显降低.与纯氧化铝陶瓷相比,含20%(体积分数)Ni粒子Al2O3/Ni金属陶瓷的断裂韧性提高了50%左右,达到6.4MPa·m1/2.复介电常数测试结果表明,在8.2～12.4GHz频率范围内,金属陶瓷复介电常数的实部和损耗随Ni粒子含量的增加逐渐上升.当Ni粒子含量达到20%(体积分数)时,由于Ni粒子之间的部分桥连现象而使介电常数虚部在一定频段出现负值.
参考文献
| [1] | 李荣久.陶瓷-金属金属陶瓷[M].北京:冶金工业出版社,2002 |
| [2] | Hussain S;Barbariol I;Roitti S.[J].Journal of the European Ceramic Society,2003(23):315-321. |
| [3] | Ji Y.;Yeomans JA. .Microstructure and mechanical properties of chromium and chromium/nickel particulate reinforced alumina ceramics[J].Journal of Materials Science,2002(24):5229-5236. |
| [4] | Lu Jinshan;Gao Lian;Sun Jing.[J].Materials Science and Engineering A,2000(293):223-228. |
| [5] | Aldrich D E;Fan Z.[J].Materials Characterization,2001(47):167-173. |
| [6] | Li Guojin;Huang Xiaoxian;Guo Jingkun.[J].Materials Science and Engineering A,2003(352):23-28. |
| [7] | Lourdin P;Juve D;Treheux D.[J].Journal of the European Ceramic Society,1996(16):745-752. |
| [8] | Vichhate Ungvichian Parambur S Neelakanla[S].IEEE,1993. |
| [9] | 科夫涅里斯特ЮК;拉扎列娃ИЮ;拉瓦耶夫 A A.工程陶瓷材料[M].北京:科学出版社,1985 |
| [10] | Nikolopoulous P;Agathopoulous S .[J].Journal of the European Ceramic Society,1992,73(05):1382-1391. |
| [11] | Tuan W H;Lin M C;Wu H H.[J].Ceramics International,1995(21):221-225. |
| [12] | Sun Xudong;Yemans J A.[J].Journal of Materials Science,1996(31):875-880. |
| [13] | Aldrich D.E.;Fan Z. .Processing, microstructure, and physical properties of interpenetrating Al_2O_3/Ni composites[J].Materials Science and Technology: MST: A publication of the Institute of Metals,2000(7-8):747-752. |
| [14] | Stuart J.Penn;Neil McN Alford;Alan Templetonp .Effect of porosity and grain size on the microwave dielectric[J].Journal of the American Ceramic Society,1997(7):1885-1888. |
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%