Tensile Properties of DyBaCuO Low Porosity Bulk Material Melt-Processed in Oxygen Atmosphere
Tensile Properties of DyBaCuO Low Porosity Bulk Material Melt-Processed in Oxygen Atmosphere
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氧气氛下熔融加工 DyBaCuO 低孔隙块体材料的拉伸性能
DOI：
10.1109/tasc.2020.2967300
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发表时间：
2020
影响因子：
1.8
通讯作者：
A. Murakami and A. Iwamoto
中科院分区：
文献类型：
--
作者：
A. Murakami;M. Muralidhar and A. Iwamoto;A. Murakami and A. Iwamoto
采用100%O2气氛熔融处理得到的DyBaCuO单晶超导块体材料，通过拉伸试验评价了材料的力学性能。在50%和75%O2气氛中熔融处理的DyBaCuO块体材料也进行了评估以进行比较。在熔体加工过程中，气孔率随氧气压力的增加而减小，在100%氧气气氛中熔体材料的气孔较少。将拉伸试件粘贴到金属棒上，将金属棒连接到万向节上进行加载。随着孔隙率的降低，复合材料的抗拉强度提高。本研究得到的抗拉强度值低于其他文献报道的弯曲强度值。在拉伸试件的断口上，观察到了裂纹扩展形成的流动形态。通过对断口的观察，讨论了多孔块体材料与低孔隙率块体材料断裂机理的差异。
Mechanical properties of a DyBaCuO single-grain superconducting bulk material obtained through the melt-processing in 100% O2atmosphere were evaluated through tensile tests for the specimens cut from the bulk material. DyBaCuO bulk materials melt-processed in 50 and 75% O2atmosphere were also evaluated for comparison. The porosity was decreased with increasing the O2pressure in the melt-processing, and few pores were observed for the bulk material melt-processed in 100% O2atmosphere. The tensile test specimens were glued to metal rods, and the metal rods were connected to the universal joints for loading. The tensile strength was improved with decreasing the porosity. The tensile strength values obtained in this study were lower than bending strength values reported elsewhere. Flow-like patterns formed by the crack propagations were observed on the fracture surfaces of the tensile test specimens. Through the observations on the fracture surfaces, differences in the fracture mechanisms between the porous and the low porosity bulk materials are discussed.