LaFe1-xZnxAsO0.85F0.15复合材料的超导和力学性能

Superconductivity and Mechanical Properties of LaFe1-xZnxAsO0.85F0.15 Compositie

本文以LaFeAsO0.85F0.15超导材料为基体，在Fe位进行Zn取代力求保证材料超导性能的同时来改善材料的力学性能。采用固态反应法制备了Fe位Zn取代的LaFel-xZnxAsO0.85F0.15材料。XRD结果表明LaFe1-xZnAsO0.85F0.15为LaFeAsOo．85Fo．15与LaZnAsOo．85Fo．15两相复合材料。当Zn含量高达80％时，LaFe1-xZnxAsOo．85Fo．15材料仍然保持超导传输性能。LaFe-xZnxAsOo．85Fo15材料的显微硬度、弹性模量和断裂韧性随着Zn含量的增加明显提高。

LaFel-xZnxAsO0. 8sF0.15 were synthesized by solid state reaction to improve the mechanical properties while keep the superconductivity through substitution of Fe by Zn. XRD results indicate that LaFe1-xZnx AsO0. 85F0.15 are series of superconductive composites composed of LaFeAsOo. 85F0.15and LaZnAsOo. 85F0.15. LaFel-xZnx AsO0.85F0.15 can still keep the superconductive transport behavior even though the content of Zn reaches up to 80%. In addition, the mechanical properties of LaFel-xZnx AsO0.85F0.15 including microhardness, Young＇s Modulus and fracture toughness have been significantly improved by Zn substitution.