摘要
通过高温固相反应法制备了不同银含量的Ag/Bi1.6Pb0.4Sr2Ca2Cu3Ox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/Bi1.6Pb0.4Sr2Ca2Cu3Ox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载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/Bi1.6Pb0.4Sr2Ca2Cu3Ox 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 tribological properties from ultra-low temperature to room temperature of the materials were studied by pin-on-disk friction testing. The results indicate that AB/Bi1.6Pb0.4Sr2Ca2Cu3Ox 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.
出处
《机械工程材料》
CAS
CSCD
北大核心
2010年第1期80-83,共4页
Materials For Mechanical Engineering
基金
国家自然科学基金资助项目(S0372026)
