以轴向送粉等离子喷涂法制备了Ni/Al2O3陶瓷涂层,分析了Ni含量变化对涂层材料的显微结构、力学性能及微波介电性能的影响.结果表明,随着Ni含量增加,涂层中Ni粒子的分布逐渐由孤立向部分桥连方式转变；陶瓷涂层的相对密度、抗弯强度呈下降趋势,这主要是由于在陶瓷涂层中Ni与Al2O3不润湿,Ni与Al2O3热膨胀系数不匹配从而形成空隙引起的.涂层断裂韧性随Ni含量的增加而升高,则是由于材料中Ni粒子发生了延展变形和引起裂纹转向.复介电常数性能测试结果表明,在8.2～12.4GHz微波频率范围内,陶瓷涂层复介电常数的实部值随Ni粒子含量的增加先逐渐上升后逐渐下降,复介电常数的虚部上升.这与Ni粒子形成的桥连结构有关.
参考文献
| [1] | Fan Zhuangjun,Luo Guohua,Zhang Zengfu,et al.Electromagnetic and microwave absorbing properties of multi-walled carbon nanotubes/polymer composites.Mater.Sci.Eng.B,2006,132(1/2):85-89. |
| [2] | Hussain S,Barbariol I,Roitti S,et al.Electrical conductivity of an insulator matrix (alumina) and conductor particle (molybdenum) composites.J.Eur.Ceram.Soc.,2003,23(2):315-321. |
| [3] | Lu Jinshan,Gao Lian,Sun Jing,et al.Effect of nickel content on the sintering behavior,mechanical and dielectric properties of Al2O3/Ni composites from coated powders.Mater.Sci.Eng.A,2000,293(1/2):223-228. |
| [4] | 邓春明,周克崧,刘敏,等(DENG Chun-Ming,et al).低压等离子喷涂氧化铝涂层的特性.无机材料学报(Journal of Inorganic Materials),2009,24 (1):117-121. |
| [5] | 易海兰,蒋志君,毛小建,等(YI Hai-Lan,et al).透明氧化铝陶瓷的研究新进展.无机材料学报(Journal of Inorganic Materials),2010,25(8):795-800. |
| [6] | 黄福祥,金吉琰,范嗣元,等.电磁屏蔽材料.材料导报,1997;11(3):18-21. |
| [7] | 李鹏,周万城,李玉琴,等(LI Peng,et al).Ni/ZrO2复合材料力学及介电性能研究.稀有金属材料与工程(Rare Metal Mat.Eng.),2008,37(11):1934-1937. |
| [8] | 龚春红,姚莉,张玉,等.超细镍粉复合材料的微波电磁特性研究.化学研究,2009,20(3):83-87. |
| [9] | 何雄辉,杨剑瑜.金属超细颗粒的微波吸收特性.西安科技学院学报,2000,20(3):257-259. |
| [10] | 张罡,武颖娜,梁勇,等(ZHANG Gang,et al).等离子喷涂Al2O3与ZrO2复合热障涂层的高温性能.稀有金属材料与工程(Rare Metal Mat.Eng.),2003,32(9):756-760. |
| [11] | Costil S,Mateus C,Coddet C.Ceramic/fluoropolymer composite coatings by plasma spraying.Surface and Coatings Technology,2006,201(5):2020-2027. |
| [12] | Dubourg L,Lima R S,Moreau C.Properties of alumina-titania coatings prepared by laser-assisted air plasma spraying.Surface and Coatings Technology,2007,201(14):6278-6284. |
| [13] | Yin Zhijian,Tao Shunyan,Zhou Xiaming,et al.Microstructure and mechanical properties of Al2O3-Al composite coatings deposited by plasma spraying.Appl.Surf.Sci.,2008,254(6):1636-1643. |
| [14] | 2hao Xiaoqin,An Yulong,Chen Jianmin,et al.Properties of Al2O3-40wt％ ZrO2 composite coatings from ultra-fine feedstocks by atmospheric plasma spraying.Wear,2008,265(11/12):1642-1648. |
| [15] | Liang Bo,Zhang Ga,Liao Hanlin,et al.Friction and wear behavior of ZrO2-Al2O3 composite coatings deposited by air plasma spraying:Correlation with physical and mechanical properties.Surface and Coatings Technology,2009,203(20/21):3235-3242. |
| [16] | Wang Dongsheng,Tian Zongjun,Shen Lida,et al.Influences of laser remelting on microstructure of nanostructured Al2O3-13 wt％ TiO2 coatings fabricated by plasma spraying.Appl.Surf.Sci.,2009,255(8):4606-4610. |
| [17] | Liu X Q,Zheng Y G,Chang X C,et al.Microstructure and properties of Fe-based amorphous metallic coating produced by high velocity axial plasma spraying.J.Alloys Compd.,2009;484(1/2):300-307. |
| [18] | Scrivani A,Bardi U,Carrafiello L,et al.A comparative study of high velocity oxygen fuel vacuum plasma spray,and axial plasma spray for the deposition of CoNiCrAlY bond coat alloy.J.Therm.Spray Techn.,2003,12:504-507. |
| [19] | Kingery W D,Bowen H K,Uhlmann D R.Introduction to Ceramics.US:John Wiley & Sons,Inc,1976:950. |
| [20] | 刘代军,罗发,李鹏,等.Al2O3/Ni金属陶瓷力学性能和介电性能的研究.功能材料,2008,39(1):26-28. |
| [21] | 楼仁海,符果行,袁敬闳.电磁理论.成都:电子科技大学出版社,1996:235-240. |
| [22] | 毛健,陈家钊,涂铭旌,等.Ni/聚乙烯复合材料复介电常数研究.功能材料,1999,30(2):212-213. |
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%