期刊
METALS
卷 11, 期 1, 页码 -出版社
MDPI
DOI: 10.3390/met11010141
关键词
pseudo-alloys; spark plasma sintering; flash spark plasma sintering; kinetics
资金
- Ministry of Science and Higher Education of the Russian Federation [K2-2020-015]
The kinetics of SPS consolidation for copper-based pseudo alloys was investigated in the heating rate range of 0.1 to 50 K/s, with flash spark plasma sintering (FSPS) achieving much higher consolidation rates compared to conventional SPS. Mechanically induced composite Cu/Cr particles showed sintering rates 2-4 times higher than traditional Cu + Cr mixtures, with a lower apparent sintering activation energy. It was concluded that FSPS of nanostructured powders is an efficient approach for the fabrication of pseudo-alloys.
Spark plasma sintering (SPS) is widely used for the consolidation of different materials. Copper-based pseudo alloys have found a variety of applications including as electrodes in vacuum interrupters of high-voltage electric circuits. How does the kinetics of SPS consolidation for such alloys depend on the heating rate? Do SPS kinetics depend on the microstructure of the media to be sintered? These questions were addressed by the investigation of SPS kinetics in the heating rate range of 0.1 to 50 K/s. The latter conditions were achieved through flash spark plasma sintering (FSPS). We also compared the sintering kinetics for the conventional copper-chromium mixture and for the mechanically induced copper/chromium nanostructured particles. It was shown that, under FSPS conditions, the observed maximum consolidation rates were 20-30 times higher than that for conventional SPS with a heating rate of 100 K/min. Under the investigated conditions, the sintering rate for mechanically induced composite Cu/Cr particles was 2-4 times higher compared to the conventional Cu + Cr mixtures. The apparent sintering activation energy for the Cu/Cr powder was twice less than that for Cu-Cr mixture. It was concluded that the FSPS of nanostructured powders is an efficient approach for the fabrication of pseudo-alloys.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据