The Role of CHPD and AIMI processing on enhancing J C and transverse connectivity of in-situ MgB2 strand.
The Role of CHPD and AIMI processing on enhancing J C and transverse connectivity of in-situ MgB2 strand.
复制标题
CHPD 和 AIMI 处理在增强原位 MgB2 链的 JC 和横向连接方面的作用。
DOI：
10.1088/1757-899x/756/1/012018
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Collings,EW
中科院分区：
文献类型：
--
作者：
Wan,F;Sumption,MD;Rindfleisch,MA;Collings,EW
对原位mgb2链的研究主要集中在通过降低孔隙率来改善jc。冷高压致密化（CHPD）和先进镁内渗（AIMI）技术都能有效去除原位MgB 2股中的空隙。本研究表明，原位mgb2链孔隙率降低的本质在于横向晶粒连通性和纵向连通性的增加。CHPD法双轴施加1.0 GPa和1.5 GPa，在5 T下分别获得了9.6× 10.4 A/ CM 2和8.5× 10.4 A/ CM 2的4.2 K J CM s，而典型的管内粉末（PIT）原位链为6.0× 10.4 A/ CM 2。此外，aimi处理的单丝mgb2链比CHPD链具有更高的jcs和横向颗粒连通性。
Research into in-situ MgB 2 strand has been focused on improvements in J C through reduction of porosity. Both of cold-high-pressure-densification (CHPD) and advanced-internal-magnesium-infiltration (AIMI) techniques can effectively remove the voids in in-situ MgB 2 strands. This study shows the nature of the reduced porosity for in-situ MgB 2 strands lies on increases in transverse grain connectivity as well as longitudinal connectivity. The CHPD method bi-axially applying 1.0 GPa and 1.5 GPa yielded 4.2 K J CM║ s of 9.6× 10 4 A/cm 2 and 8.5× 10 4 A/cm 2 at 5 T, respectively, with compared with 6.0× 10 4 A/cm 2 for typical powder-in-tube (PIT) in-situ strand. Moreover, AIMI-processed monofilamentary MgB 2 strand obtained even higher J C s and transverse grain connectivity than the CHPD strands.