AlMgB14-TiB2 synthesized by a two-step heat-treatment method

作者：Li C S; Yang F^*; Yan G; Xiong X M; Liu G Q; Sun Y Y; Zhang S N; Wang Q Y; Feng J Q

来源：Journal of Alloys and Compounds, 2014, 587: 790-793.

DOI：10.1016/j.jallcom.2013.11.013

• Ceramics
• MgB2
• AlMgB14
• TiB2
• Sintering

Superhard materials AlMgB14-xTiB(2) disks were synthesized by a two-step heat-treatment method. In the first step, AlMg6B14-xTiB(2) disks were fabricated by uniformly mixed Mg, B, Al powders and different contents Ti powder, and then AlMg6B14-xTiB(2) disks were heated at 850 degrees C for 2 h in closed argon atmosphere. In the second step, AlMg6B14-xTiB(2) disks were sintered at 1050 degrees C for half an hour in vacuum, then target AlMgB14-xTiB(2) disks were obtained. The phase, microstructure and superconductivity were characterized by means of X-ray diffraction (XRD), scanning electron microscope (SEM) and superconducting quantum interference device (SQUID). The nano-scale TiB2 particles as the second phase induced by Ti doping are uniformly distributed in the sample matrix. The results reveal that the stepwise synthesis method can produce practical AlMgB14-TiB2 materials.

• 出版日期2014-2-25
• 单位西北有色金属研究院