论文部分内容阅读
通过部分熔化处理工艺和普通两段热处理工艺的对比研究,分析了部分熔化处理工艺在不同热处理阶段对(Bi,Pb)-2223/Ag带材相组成和微结构的影响。实验结果显示,在熔化温度下,部分(Bi,Pb)-2212相发生分解,分解为(Sr,Ca)2CuO3相、(Sr,Ca)Cu2O3相和富(Bi,Pb)液相,与此同时(Sr,Ca)2CuO3相和(Sr,Ca)Cu2O3相快速长大。随着冷却和成相处理,(Sr,Ca)2CuO3相和(Sr,Ca)Cu2O3相长大到一定尺寸,各相系统达到平衡后,就不再长大,并和部分液相反应,重新生成具有良好取向的(Bi,Pb)-2212相。在成相处理阶段,(Bi,Pb)-2212相转化为(Bi,Pb)-2223相,同时生成的(Bi,Pb)-2223相继承了(Bi,Pb)-2212相的良好取向,使(Bi,Pb)-2223相织构得以改善,致密度得到提高,结果最终带材的性能得到提高。通过部分熔化处理工艺处理的带材Ic达到51A,而普通两段热处理工艺处理的带材Ic为36A,Ic提高了约40%。
By comparing the partial melting process with the ordinary two-stage heat treatment process, the influence of partial melting process on the phase composition and microstructure of (Bi, Pb) -2223 / Ag tapes at different heat treatment stages was analyzed. The experimental results show that some (Bi, Pb) -2212 phases decompose and decompose into (Sr, Ca) 2CuO3, (Sr, Ca) Cu2O3 and Bi Meanwhile, (Sr, Ca) 2CuO3 phase and (Sr, Ca) Cu2O3 phase grow rapidly. With the cooling and processing, the (Sr, Ca) 2CuO3 phase and the (Sr, Ca) Cu2O3 phase grow up to a certain size. After the phases of the phases reach equilibrium, they will no longer grow up and react with part of the liquid phase, A (Bi, Pb) -2212 phase with good orientation was generated. During phase formation, the (Bi, Pb) -2223 phase is transformed into (Bi, Pb) -2223 phase and the (Bi, The texture of (Bi, Pb) -2223 phase is improved and the densification degree is improved. As a result, the properties of the final strip are improved. The strip Ic treated by the partial melting process reaches 51 A, whereas the strip Ic treated by the conventional two-stage heat treatment process is 36 A and the Ic is increased by about 40%.