Yamaguti
Haruhiko Yamaguti, Yokohama-Shi JP
Patent application number | Description | Published |
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20150251957 | SILICON NITRIDE SINTERED BODY AND WEAR RESISTANT MEMBER USING THE SAME - The present invention provides a silicon nitride sintered body comprising a silicon nitride crystalline particle and a grain boundary phase, the silicon nitride sintered body having an area ratio of the grain boundary phase per 100 μm×100 μm unit area of 15 to 35% when an arbitrary cross section thereof is photographed. Further, it is preferable that the area ratio of the grain boundary phase per 100 μm×100 μm unit area is 15 to 25%. Furthermore, the silicon nitride sintered body is suitable for a wear resistant member. Due to above structure, there can be provided a silicon nitride sintered body and a wear resistant member having a high processability (workability) and an excellent sliding property. | 09-10-2015 |
Ryuji Yamaguti, Nagoya-City JP
Patent application number | Description | Published |
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20160001460 | EXTRUSION FORMING APPARATUS AND EXTRUSION FORMING METHOD - An extrusion forming apparatus includes an extruding section, a chamber drum, and a forming section. The extruding section kneads a material including a ceramic raw material and extrudes a kneaded material. The chamber drum has a first space portion having a first extruding direction extending portion through which the kneaded material is allowed to flow in an extruding direction, and a second space portion which has a second extruding direction extending portion extending in the extruding direction and a direction changing portion bending from the extruding direction to a downward direction, to allow the kneaded material to flow in the downward direction changed from the extruding direction. The second space portion has a cross section obtained by isotropically decreasing a cross section of the first space portion perpendicular to a flow-through direction of the kneaded material. The forming section has a die to extrude a ceramic formed body. | 01-07-2016 |
Yukio Yamaguti, Tokyo JP
Patent application number | Description | Published |
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20090020870 | ELECTRONIC DEVICE PROVIDED WITH WIRING BOARD, METHOD FOR MANUFACTURING SUCH ELECTRONIC DEVICE AND WIRING BOARD FOR SUCH ELECTRONIC DEVICE - An electronic device ( | 01-22-2009 |