Construction of scientific principle on novel directly applied current sintering and its development toward functional and structural materials design

2016 Fiscal Year Final Research Report

• Project/Area Number: 26289272
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Material processing/Microstructural control engineering
• Research Institution: Osaka University
• Principal Investigator: Mikio Ito 大阪大学, 工学(系)研究科(研究院), 准教授 (00294033)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 通電焼結 / 固化成型 / 反応焼結 / 熱電材料 / 微細組織

Outline of Final Research Achievements

In order to investigate the effects of directly applied current sintering on promotion of densification and reaction, synthesis of the thermoelectric Mg2Si sintered body was tried. The densification behaviour, Mg2Si phase formation and the power consumption during sintering and the relative density of the sample were compared to those of a sample sintered by the conventional PCS. When the powders were heated by directly applied current sintering, the densification became larger during heating and the density of a sintered body was also significantly higher as compared to the conventional PCS. Furthermore, directly applied current sintering is found to accelerate the reaction between Mg and Si to form Mg2Si phase. In the case of the thermoelectric β-FeSi2, the similar densification behavior and fine microstructure were obtained by this modified PCS process, indicating that this process is expected to be significantly beneficial for synthesis of thermoelectric materials.

Free Research Field

粉体機能化工学