SUPERFINE PARTICLE SINTERED BODY AND METHOD OF MANUFACTURING THE SAME

Title:

SUPERFINE PARTICLE SINTERED BODY AND METHOD OF MANUFACTURING THE SAME

Document Type and Number:

Japanese Patent JP2014040952

Kind Code:

A

Abstract:

To provide a superfine particle sintered body which has the same porosity on the surface as a porosity on the interior in a stereoscopic shape, and has an even capillary force characteristic as a whole.

A predetermined amount of superfine particle powder is poured into a filling mold 10 comprising a copper outer mold 11 and a copper core mold 13 and, thereafter, the whole of the filling mold 10 is heated in vacuum at a temperature lower than the melting point of the superfine particle powder to form a sintered body. Subsequently, the filling mold 10 integrated with the sintered body is immersed in a copper etching solution, for example, nitric acid having concentration of 30% and the filling mold 10 is dissolved and removed. The copper etching solution does not dissolve the surface of the sintered body and, therefore, the superfine particle sintered body 3 after dissolving and removing the filling mold 10 has the same porosity on the surface as a porosity on the interior without damaging a surface fine pore shape in an arbitrary stereoscopic shape.

Inventors:

KOBAYASHI MINORU
YAMANAKA HIROMI
NOMURA TAKEHIDE

Application Number:

JP2012182874A

Publication Date:

March 06, 2014

Filing Date:

August 22, 2012

Export Citation:

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