Browsing by Author "Park, Joo Seok"

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Citation - WoS: 4
Citation - Scopus: 2
Mechanical Properties and Electrical Resistivity of Sic-Tic Composites With Nitrate Sintering Additives
(Korean Assoc Crystal Growth, inc, 2020) So, Sung Min; Hwang, Hee Woong; Yi, Sam Heang; Park, Joo Seok; Kim, Kyoung Hun; Lee, Kwang Ho; Lee, Sung Gap; 01. Atılım University
We fabricated SiC-TiC composites by hot-press sintering with aluminum and yttrium nitrate additive and evaluated crystal phase, relative density, microstructure, electrical resistivity and mechanical properties of the sintered body. And the effect of nitrate additive on the densification of SiC-TiC composites was compared with that of Al2O3 and Y2O3 additives. Because nitrate additives were uniformly dispersed in SiC and TiC mixture, it inhibited the growth of crystal grain between each other and formed fine and uniform microstructure, thereby improving mechanical properties and electrical resistivity. The electrical resistivity and flexural strength of the SiC-TiC composite with aluminum and yttrium nitrate additive were 2.3 Omega.cm and 652.3 MPa respectively.
Citation - WoS: 55
Citation - Scopus: 63
Mechanical Properties of B₄c-sic Composites Fabricated by Hot-Press Sintering
(Elsevier Sci Ltd, 2020) So, Sung Min; Choi, Woo Hyuk; Kim, Kyoung Hun; Park, Joo Seok; Kim, Min Suk; Park, Jongee; Kim, Hyung Sun; Metallurgical and Materials Engineering; 06. School Of Engineering; 01. Atılım University
We fabricated boron carbide-silicon carbide (B4C-SiC) composites by hot-press sintering without additives and evaluated the crystal phase, relative density, microstructure, and mechanical properties of the sintered body. When B4C and SiC were uniformly dispersed in the composite, crystal growth was inhibited, and a sintered body with a fine and uniform microstructure, with improved mechanical properties, was fabricated. The relative density of B4C-SiC composites sintered at temperatures lower than 2000 degrees C and 40 MPa of pressure exceeded 99.8%, and the bending strength and Vickers hardness at B4C 50 wt% were 645 MPa and 30.6 GPa, respectively.