采用放电等离子烧结(SPS)技术制备了Ag-10%SnO2电接触材料。对材料的微观结构，断口形貌，电弧侵蚀表面形貌和烧结过程进行了研究。实验结果表明，Ag-10%SnO2电接触材料的 SPS过程由3个基本阶段构成。在SPS过程中，颗粒的形状和尺寸随晶界的形成而发生变化。所得材料显微组织显示，SnO2颗粒弥散分布于Ag基体中，无颗粒聚集现象。SPS技术烧结的Ag-10%SnO2材料由于晶粒细小而具有较高的强度与较好的塑性。在800℃/5 min的烧结条件下，材料的拉伸断口形貌出现较多大而深的韧窝，韧窝中包含氧化物颗粒。Ag-10%SnO2电接触材料的断裂模式为微孔缩聚塑性断裂。材料的电弧侵蚀表面显示出大量的浆糊状凝固物和气泡。
Ag-10%SnO2 electrical contact material was prepared by spark plasma sintering. The microstructures, fracture appearances, arc erosion surfaces and sintering process of the material were investigated. The experimental results showed that there are three basic stages in the spark plasma sintering process. During the sintering process, the shape and size of each particle changed with the formation of grain boundaries. The SnO2 particles distribute diffusely in Ag matrix, and there is no particles gathering together in the matrix. The Ag-10%SnO2 material thus prepared could keep the grains fine and has high strength and good ductility due to fine grain strengthening. The tensile fracture morphology of the material heated by SPS at 800℃for 5 min shows a great number of large and deep dimples, in which the oxide particles exist. The fracture mode of the Ag-10%SnO2 material is the microporous polycondensation plastic fracture. The arc erosion surfaces of the material show a large number of paste-like coagulum and bubbles.
参考文献
| [1] | J. Swingler,A. Sumption.Arc erosion of AgSnO2 electrical contacts at different stages of a break operation[J].稀有金属（英文版）,2010(03):248-254. |
| [2] | Lungu M;Gavriliu S;Canta T et al.AgSnO2 sintered electrical contacts with ultrafine and uniformly dispersed microstructure[J].JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS,2006,8(2):576-581. |
| [3] | Liu XM;Wu SL;Chu PK;Chung CY;Zheng J;Li SL .Effects of coating process on the characteristics of Ag-SnO2 contact materials[J].Materials Chemistry and Physics,2006(2/3):477-480. |
| [4] | J.W.Lee;H.C.Lee .Effects of tellurium addition on the internal oxidation of Ag-Sn alloys[J].Scripta materialia,1999(2):169-173. |
| [5] | 王家真,王亚平,杨志懋,王伟,丁秉钧.CuO添加剂对Ag/SnO2润湿性与界面特性的影响[J].稀有金属材料与工程,2005(03):405-408. |
| [6] | Ken-ichi Shimizu;Makoto Katagiri;Shigeo Satokawa.Sintering-resistant and self-regenerative properties of Ag/SnO2 catalyst for soot oxidation[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2011:39-46. |
| [7] | Tripathy SK;Kwon HW;Leern YM;Kim BG;Yu YT .Ag@SnO2 core-shell structure nanocomposites[J].Chemical Physics Letters,2007(1-3):101-104. |
| [8] | Lungu M;Gavriliu S;Nitu S;Canta T;Sin D;Budrugeac P;Patrol D .New Ag-SnO2-MeO ecological advanced materials for electrical contacts used in electromagnetic contactors[J].Journal of optoelectronics and advanced materials,2008(5):1064-1068. |
| [9] | Hoon Cho;Duck-Young Hwang;Hyung-Ho Jo .A Study on the Development of Environment-Friendly Ag-SnO2 Electric Contact Materials through a Powder Metallurgy[J].Materials Science Forum,2007(3):2761-2766. |
| [10] | N. Lorrain;L. Chaffron .Sintering and evolution of nanocomposite powders Ag-SnO2 prepared by reactive milling[J].Materials Science Forum,1999(0):153-158. |
| [11] | Feng, J;Chen, JC;Xiao, B;Zhou, CT;Hong, ZJ;Zhou, R .Stability, thermodynamic and mechanical properties of the compounds in the Ag-Sn-O system[J].Physica, B. Condensed Matter,2009(16):2461-2467. |
| [12] | Kang S.;Brecher C. .Cracking mechanisms in Ag-SnO/sub 2/ contact materials and their role in the erosion process[J].IEEE transactions on components, hybrids, and manufacturing technology,1989(1):32-38. |
| [13] | Qibin Ye;Yaping Wang .Redistribution of SnO_2 particles in Ag/SnO_2 materials during rapid solidification[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2007(0):1045-1048. |
| [14] | Jingchao Chen,Jing Feng,B.Xiao,K.H.Zhang,Y.P.Du,Z.J.Hong,R.Zhou.Interface Structure of Ag/SnO_2 Nanocomposite Fabricated by Reactive Synthesis[J].材料科学技术学报（英文版）,2010(01):49-55. |
| [15] | 姜凤阳,王俊勃,付翀,杨敏鸽,贺辛亥,苏晓磊,丁秉钧,刘江南.等离子喷涂纳米复合Ag/SnO2电触头材料放电性能研究[J].稀有金属材料与工程,2012(08):1443-1446. |
| [16] | 王松,谢明,张吉明,杨有才,刘满门,陈永泰,王塞北.放电等离子烧结技术进展[J].贵金属,2012(03):73-77. |
| [17] | 陈晓华,贾成厂,刘向兵.烧结温度对SPS制备Ag/La2O3触点材料的影响[J].粉末冶金技术,2007(06):420-423,429. |
| [18] | 刘向兵,贾成厂,王富祥,盖国胜,陈晓华.热压与放电等离子体烧结两种工艺制备Al2O3/Cu复合材料[J].复合材料学报,2007(04):76-81. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%