Mechanical Properties of REBaCuO Single-Grain Bulk Fabricated by Infiltration Growth Technique
Mechanical Properties of REBaCuO Single-Grain Bulk Fabricated by Infiltration Growth Technique
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渗透生长技术制备 REBaCuO 单晶块体的力学性能
DOI：
10.1088/1361-6668/ab5cf8
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发表时间：
2020
影响因子：
3.6
通讯作者：
M. Muralidhar and A. Iwamoto
中科院分区：
文献类型：
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作者：
A. Murakami;M. Muralidhar and A. Iwamoto
为了研究用熔渗法制备的（Gd，Dy）BaCuO致密块体材料的力学性能和断裂机制，进行了拉伸试验。通过渗透生长技术制备的（Gd，Dy）BaCuO致密块体材料的平均抗拉强度值为44 MPa，其上级于通过在50%O2气氛中熔融加工制备的多孔块体材料的平均抗拉强度值（37 MPa），并且与已经在别处报道的通过在100%O2（45MPa）中熔融加工制造的致密块体材料的性能相当。通过观察裂纹扩展在断口上形成的流状图案，确定了致命裂纹的萌生位置。在（Gd，Dy）BaCuO致密块体材料的断裂面上，在裂纹萌生点附近观察到一个异常大的气孔、偏析的第二相粒子和一些主要由Pt组成的夹杂物。
In order to investigate the mechanical properties and fracture mechanisms of (Gd, Dy) BaCuO dense bulk material fabricated by the infiltration growth technique, tensile tests were carried out for specimens cut from the as-grown bulk material. The average tensile strength value of the (Gd, Dy) BaCuO dense bulk material fabricated by the infiltration growth technique was 44 MPa, which is superior to that of a porous bulk material fabricated through melt-processing in a 50% O 2 atmosphere (37 MPa), and comparable to that of a dense bulk material fabricated through melt-processing in 100% O 2 (45 MPa) that have been reported elsewhere. Through the observations of the flow-like patterns formed by the crack propagations on the fracture surfaces, the fatal crack initiation site was identified. One extraordinarily large pore, segregated secondary phase particles and some inclusion that mainly consists of Pt were observed around the crack initiation site on the fracture surfaces of the (Gd, Dy) BaCuO dense bulk material.