为适应20℃～-200℃温度的适用范围, 采用固相法制备了Bi_(1.6) Pb_(0. 4)Sr_2Ca_2Cu_3O_(10-x)超导材料, 用摩擦磨损试验机测试了Bi_(1.6) Pb_(0. 4)Sr_2Ca_2Cu_3O_(10-x)从液氮温度至室温的摩擦学性能. 结果表明: 在室温20℃下, Bi_(1. 6) Pb_(0. 4)Sr_2Ca_2Cu_3O_(10-x)与对偶件轴承钢盘对摩时, 摩擦系数约为0. 35, 当温度降到超导转变温度以下时(液氮温度-170℃)摩擦系数大幅度降低, Bi_(1. 6) Pb_(0. 4)Sr_2Ca_2Cu_3O_(10-x)超导态摩擦系数为正常态值的一半, 实验证明了电子激励对摩擦能量耗散的作用. 为改善室温下Bi_(1. 6) Pb_(0. 4)Sr_2Ca_2Cu_3O_(10-x)摩擦学性能, 掺杂不同质量分数Ag作为润滑组元, 制备了Ag/Bi_(1. 6) Pb_(0. 4)Sr_2Ca_2Cu_3O_(10-x)超导固体润滑复合材料, 取得良好耐磨减摩效果. Ag掺杂不影响Ag/Bi_(1. 6) Pb_(0. 4)Sr_2Ca_2Cu_3O_(10-x)复合材料的超导性, 在正常载荷和滑动速度下10 wt%Ag/Bi_(1. 6) Pb_(0. 4)Sr_2Ca_2Cu_3O_(10-x)复合材料摩擦系数为0. 2～O. 3, 磨损率为4. 57×10~(-4) mm~3·(N·m)~(-1).
The superconducting Bi_(1.6)Pb_(0.4)Sr_2Ca_2Cu_3O_(10-x) samples were prepared by the solid-state synthesismethod. The tribological properties were measured on the friction and wear tester from ambient temperature toliquid nitrogen temperature. The results indicate that the friction coefficient of Bi_(1.6)Pb_(0.4)Srz_2Ca_2Cu_30_(10-x) againststainless steel is about 0.35 at the ambient temperature and decreases abruptly to half of the normal state value whenthe temperature is below the superconducting transition temperature of Bi_(1.6)Pb_(0. 4_Srz_2Ca_2Cu_30_(10-x). Themeasurements prove directly the effect of electronic excitation on friction. Moreover, the Ag/Bi_(1.6) Pb_(0.4)Sr_2Ca_2Cu_3O_(10-x) composite samples were prepared by sintering Bi_(1.6)Pb_(0.4)Sr_2Ca_2Cu_3O_(10-x) with Ag at different mass fractions to improve the tribological properties of Bi_(1.6)Pb_(0.4)Sr_2Ca_2Cu_3O_(10-x) at room temperature. The experimental results show that the friction coefficient of 10 Wt%Ag/Bi_(1. 6) Pb_(0. 4)Sr_2Ca_2Cu_3O_(10-x) is about 0. 2～O. 3 and the wear rate is 4. 57×10~(-4)mm~3·(N·m)~(-1), and the superconductivity of 10 Wt% Ag/Bi_(1. 6) Pb_(0. 4)Sr_2Ca_2Cu_3O_(10-x) is not degenerated.
参考文献
| [1] | Kazunoi U.Fundamental research of self-lubrication of typical ceramics at high temperature[D].Tokyo:Toyohashi University of Technology,1998. |
| [2] | Mason B I,Winder S M,Krim J.On the current status of quartz crystal microbalance studies of superconductivity dependent sliding friction[J].Tribology Letters,2001,10(1/2):59-65. |
| [3] | Dayo A,Alnasrallah W,Krim J.superconductivity dependent sliding friction[J].Physical Review Letters,1998,2:1690-1693. |
| [4] | Persson B N J.Electronic friction on a superconductor surface[J].Solid State Communications,2000,115:145-148. |
| [5] | Liebsch A,Goncalves S,Kiwi M.Electronic versus phononic friction of xenon on silver[J].Physical Review B,1999,60:5034-5044. |
| [6] | Mak C,Krim J.Quartz crystal microbalance studies of the velocity dependence of interfacial friction[J].Physical Review B,1998,9:5157-5159. |
| [7] | Ding Q D,Li C S.Preparation and properties of YBa_2 Cu_3O_(7-x) self-lubricating composites[J].Wear,2008,256:1136-1141. |
| [8] | 于德洋,薛群基.空间摩擦学研究的前沿领域[J].摩擦学学报,1997,17(4):380-384.Yu Deyang,Xue Qunji.Frontiers for space tribology investigation[J].Tribology,1997,17(4):380-384. |
| [9] | 古乐,王黎钦,李秀娟,等.超低温环境固体润滑研究的发展现状[J].摩擦学学报,2002,22(4):314-320.Gu le,Wang Liqin,Li Xiujuan,et al.Research status of cryogenic solid lubrication[J].Tribology,2002,22(4):314-320. |
| [10] | 葛毅成,易茂中,黄伯云.复合材料与石墨材料干态摩擦磨损行为[J].复合材料学报,2004,21(6):93-97.Ge Yieheng,Yi Maozhong,Huang Baiyun.Tribology properties of C/C composites and graphite at non-lubrication wear environment[J].Acta Materiae Compositae Sinica,2004,21(6):93-97. |
| [11] | 黄承亚,龚克成,蔡立芳,等.无机填料增强聚苯酯/聚四氟乙烯复合材料的力学和摩擦磨损性能[J].复合材料学报,2006,23(4):36-40.Huang Chenya,Gong Kecheng,Cai Lifang,at al.Mechanics,friction and wear properties of inorganic filled Ekonol/PTFE composites[J].Acta Materiae Compositae Sinica,2006,23(4):36-40. |
| [12] | Bruneel E,Degrieck J.Van Driessche l,et al.Mechanical properties of Bi-2223/Ag bulk composites[J].Physica,2002,372/376:1063-1066. |
| [13] | Fang Y,Danyluk S.Effect of temperature on the coefficient of friction of Bi_2Sr_2Ca_1Cu_2O_x/Bi_2Sr_2Ca_1Cu_2O_x and Bi_2Sr_2Ca_1-Cu_2O_x/Ag[J].Journal of Materials Science Letters,1994.13:852-855. |
| [14] | 胡元中,王慧,邹鲲,等.超滑和界面摩擦及耗散过程[J].摩擦学学报,2000,20(8):313-316.Hu Yuanzhong,Wang Hui,Zou Kun,et al.Superlubricity,interfaeial friction and dissipation[J].Tribology,2000,20(8):313-316. |
| [15] | Ben Azzouz F,M'Chirgui A,Yangui B,et al.Synthesis,microstructural evolution and the role of substantial addition of PbO during the final processing of(Bi,Pb)-2223 super-conductors[J].Physica C,2001,356:83-96. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%