Cold compaction Process of Ceramic Powders using a Mold built by FIB Processing(Papers)
野口, 裕之Hiroyuki, Noguchi
日本工業大学研究報告 = Report of researches, Nippon Institute of Technology
58 , 2016-09-25
To eliminate the volume change of ceramics during sintering, in this study, we attempt to produce sintered alumina only by compressing alumina powder at room temperature. Thereby, for applying ultrahigh pressures, we focused on the pressure tightness and mold releasability of diamond. The diamond anvils we used are of the type widely used in high pressure experiments. With the diamond anvils placed one above the other, three -dimensional fine carving was performed on the culet (planar section) of one of the diamond anvils using focused ion -beam(FIB) technology for creating a diamond micro mold. First, alumina powder was compressed under a high pressure using flat diamond anvils. Then, alumina powder was subjected to high-pressure molding under vertical compression using the fabricated micro mold without lubrication at room temperature. Cross-sectional texture of the compressed body was observed using a scanning transmission electron microscope (STEM).