通过高温固相反应法制备了不同银含量的Ag/Bi_(1.6)Pb_(0.4)Sr_2Ca_2Cu_3O_x超导材料,用XRD和SEM分析了其物相组成及显微结构;用销-盘式摩擦试验机研究了该材料从低温到常温的摩擦学性能.结果表明:Ag/Bi_(1.6)Pb_(0.4)Sr_2Ca_2Cu_3O_x材料由超导相和银相组成;温度从室温降低到超导转变温度以下时,其摩擦因数明显降低,在非超导态时摩擦因数为0.4,达到超导转变温度时摩擦因数为0.2;加入银后其摩擦因数随栽荷和滑动速度的提高而增大;银含量对其摩擦因数的影响规律不明显;加入银后可提高其减摩耐磨性能.
Superconducting composites Ag/Bi_(1.6)Pb_(0.4)Sr_2Ca_2Cu_3O_x with different contents of silver were successfully synthesized by high-temperature solid-state reaction method. The microstructure and phase composition of the as-synthesized samples were characterized by XRD and SEM. The tribolngical properties from ultra-low temperature to room temperature of the materials were studied by pin-on-disk friction testing. The results indicate that Ag/Bi_(1.6)Pb_(0.4)Sr_2Ca_2Cu_3O_x materials were composed of superconductor phase and Ag phase. The friction coefficient of the samples decreased obviously when the temperature was lowered to less than the superconducting transition temperature. The friction coefficient was 0. 4 in non-superconducting state. At superconducting transition temperature, the friction coefficient was 0. 2. The friction coefficient of the material with addition of Ag increased with the increase of load and sliding speed. The influence law of Ag content on the friction coefficient was not significant. The properties of antifriction and wear resistance were improved after Ag addition.
参考文献
| [1] | B. L. Mason;S. M Winder;J. Krim .On the current status of quartz crystal microbalance studies of superconductivity-dependent sliding friction[J].Tribology letters,2001(1/2):59-65. |
| [2] | Torres ES;Goncalves S;Scherer C;Kiwi M .Nanoscale sliding friction versus commensuration ratio: Molecular dynamics simulations[J].Physical review, B. Condensed matter and materials physics,2006(3):5434-1-5434-8-0. |
| [3] | Qiaodang Ding;Changsheng Li;Lirong Dong;Minlu Wang;Yi Peng;Xuehua Yan .Preparation and properties of YBa{sub}2Cu{sub}3O{sub}(7-δ)/Ag self-lubricating composites[J].Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear,2008(7/8):1136-1141. |
| [4] | 姜春华,李长生,丁巧党.镍-铬基自润滑复合材料的制备及性能[J].机械工程材料,2007(04):48-51. |
| [5] | 董丽荣,李长生,华敏奇,丁巧党.超导体YBa2 Cu3 O7-δ的摩擦学特性研究[J].摩擦学学报,2008(04):345-350. |
| [6] | 董丽荣,李长生,丁巧党,王旻璐,彭义.超导PbO/YBa2Cu3O7-δ复合氧化物摩擦磨损性能[J].复合材料学报,2008(04):143-148. |
| [7] | Ben Azzouz F.;Yangui B.;Boulesteix C.;Ben Salem M.;M'chirgui A. .Synthesis, microstructural evolution and the role of substantial addition of PbO during the final processing of (Bi,Pb)-2223 superconductors[J].Physica, C. Superconductivity and its applications,2001(1/2):83-96. |
| [8] | B.A. Marinkovic;P.M. Jardim;F. Rizzo;L. Mancic;O. Milosevic .Characterization and phase transitions of (Bi,Pb)_2Sr_2Ca_2Cu_3O_x-Ag composite powder obtained by spray pyrolysis[J].Materials Chemistry and Physics,2005(2/3):233-240. |
| [9] | Gul IH;Amin F;Abbasi AZ;Anis-Ur-Rehman M;Maqsood A .Effect of Ag2CO3 addition on the morphology and physical properties of Bi-based (2223) high-T-c superconductors[J].Physica, C. Superconductivity and its applications,2006(2):139-147. |
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