Development and application of SPS in spark plasma sintering at home and abroad

SPS technology is heated and sintered by directly introducing pulse current between powder particles, so it is also called plasma activated sintering or plasma-assisted sintering -PAS in some literatures. As early as 1930, American scientists put forward the principle of pulse current sintering, but it was not until 1965 that pulse current sintering technology was applied in the United States, Japan and other countries. Japan obtained the patent of SPS technology, but it failed to solve the problem of low production efficiency at that time, so SPS technology was not popularized and applied.

From 65438 to 0988, Japan developed the first industrial SPS device, which was widely used in the research field of new materials. Following 1990, Japan introduced the third generation of SPS products that can be used in industrial production, with sintering pressure of 10 ~ 100 t and pulse current of 5000 ~ 8000a ... Recently, a large-scale SPS device with pressure of 500t and pulse current of 25000A was developed. Because SPS technology has the advantages of high speed, low temperature and high efficiency, in recent years, many foreign universities and scientific research institutions have successively equipped SPS sintering systems and used SPS to research and develop new materials. From 65438 to 0998, Sweden purchased SPS sintering system, and did a lot of research work on carbide, oxide, bioceramics and other materials.

In recent three years, China has also carried out the research work of preparing new materials by SPS technology, and introduced several SPS sintering systems, which are mainly used for sintering nano-materials and ceramic materials. As a new material preparation technology, SPS has attracted extensive attention at home and abroad.