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http://dx.doi.org/10.3740/MRSK.2022.32.12.538

Development of Ternary Inorganic Binder System for Manufacturing High-Functional Ceramic Molds and Core  

Hye-Yeong Park (Mechatronics Research Center, Changwon National University)
Geun-Ho Cho (Mechatronics Research Center, Changwon National University)
Hyun-Hee Choi (Mechatronics Research Center, Changwon National University)
Bong Gu Kim (Department of Materials Convergence and System Engineering, Changwon National University)
Eun-Hee Kim (Mechatronics Research Center, Changwon National University)
SeungCheol Yang (Department of Materials Convergence and System Engineering, Changwon National University)
Yeon-Gil Jung (Department of Materials Convergence and System Engineering, Changwon National University)
Publication Information
Korean Journal of Materials Research / v.32, no.12, 2022 , pp. 538-544 More about this Journal
Abstract
In existing ceramic mold manufacturing processes, inorganic binder systems (Si-Na, two-component system) are applied to ensure the effective firing strength of the ceramic mold and core. These inorganic binder systems makes it possible to manufacture a ceramic mold and core with high dimensional stability and effective strength. However, as in general sand casting processes, when molten metal is injected at room temperature, there is a limit to the production of thin or complex castings due to reduced fluidity caused by the rapid cooling of the molten metal. In addition, because sodium silicate generated through the vitrification reaction of the inorganic binder is converted into a liquid phase at a temperature of 1,000 ℃. or higher, it is somewhat difficult to manufacture parts through high-temperature casting. Therefore, in this study, a high-strength ceramic mold and core test piece with effective strength at high temperature was produced by applying a Si-Na-Ti three-component inorganic binder. The starting particles were coated with binary and ternary inorganic binders and mixed with an organic binder to prepare a molded body, and then heat-treated at 1,000/1,350/1,500 ℃ to prepare a fired body. In the sample where the two-component inorganic binder was applied, the glass was liquefied at a temperature of 1,000 ℃ or higher, and the strength decreased. However, the firing strength of the ceramic mold sample containing the three-component inorganic binder was improved, and it was confirmed that it was possible to manufacture a ceramic mold and core via high temperature casting.
Keywords
ceramic mold; ceramic core; inorganic binder; ternary system; firing strength;
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