Korea Institute of Energy Research

Korea Institute of Machinery & Materials

Kookmin University

Do-Kyung Kim

Jeong-gu Yeo

Dong-Kook Kim

Young-soo Ahn

Churl-Hee Cho

Hong-Soo Kim

Yun-Sung Kim

Seok-woo Jeon

Hai-Doo Kim

In-Hyuck Song

Yoo-Dong Hahn

Hye-Ji Park

Yoon-Sook Noh

Chang-Ui Ahn

Hyun-Gyung Jo

Dong-Seok Kim

Hee-Man Choe

Myoung-Geun Choi

A method of manufacturing a porous metal foam having pores of nano size includes: manufacturing a porous polymer foam containing pores of nano size; and coating metal on the porous polymer foam through electroless plating. The present invention provides porous metal foams which contains nano-sized pores and hence, their specific surface area is maximized owing to the regularly-patterned nanoporous structure formed inside.

Method of manufacturing porous metal foam

Disclosed herein is a method of manufacturing inorganic hollow yarns, such as cermets, oxide-non oxide composites, poorly sinterable non-oxides, and the like, at low costs. The method includes preparing a composition comprising a self-propagating high temperature reactant, a polymer and a dispersant, wet-spinning the composition through a spinneret to form wet-spun yarns, washing and drying the wet-spun yarns to form polymer-self propagating high temperature reactant hollow yarns, and heat-treating the polymer-self propagating high temperature reactant hollow yarns to remove a polymeric component from the polymer-self propagating high temperature reactant hollow yarns while inducing self-propagating high temperature reaction of the self-propagating high temperature reactant to form inorganic hollow yarns. The composition comprises 45&#x2dc;60 wt % of the self-propagating high temperature reactant, 6&#x2dc;17 wt % of the polymer, 0.1&#x2dc;4 wt % of the dispersant, and the balance of an organic solvent.

Inorganic hollow yarns and method of manufacturing the same

Disclosed are composition and a method for making a high volume reinforced Al composite by use of a dipping process. Through the method comprising mixing 20-50 wt % of exothermic reaction-causing Ti and C or Ti and B powders, 20-60 wt % of exothermic reaction-controlling diluent powders, and 5-30 wt % of infiltration-aiding Al or Al alloy powders, then preparing mixture powders; preforming the mixture powders into a predetermined shape; fitting the preformed body in a reaction container, followed by dipping in an Al melt of 700-1,100&deg; C.; and separating the synthesized composite from the reaction container after removal from the Al melt, a high volume reinforced Al composite can be prepared from the mixture powders through such exothermic synthesis in a metal melt that reinforced particles are uniformly distributed while restraining the generation of pores. As such, the exothermic reaction-controlling diluent powders are selected from the group consisting of TiC, TiB , SiC, WC or mixtures thereof.

Method for making high volume reinforced aluminum composite by use of dipping process

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Daejeon, South Korea

Do-Kyung Kim