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http://dx.doi.org/10.6111/JKCGCT.2020.30.6.271

Effect of pyrolysis temperature and pressing load on the densification of amorphous silicon carbide block  

Joo, Young Jun (Fibrous Ceramics & Aerospace Materials Center, Korea Institute of Ceramic Engineering and Technology)
Joo, Sang Hyun (Fibrous Ceramics & Aerospace Materials Center, Korea Institute of Ceramic Engineering and Technology)
Cho, Kwang Youn (Fibrous Ceramics & Aerospace Materials Center, Korea Institute of Ceramic Engineering and Technology)
Publication Information
Journal of the Korean Crystal Growth and Crystal Technology / v.30, no.6, 2020 , pp. 271-276 More about this Journal
Abstract
In this study, an amorphous SiC block was manufactured using polycarbosilane (PCS), an organosilicon polymer. The dense SiC blocks were easily fabricated in various shapes via pyrolysis at 1100℃, 1200℃, 1300℃, 1400℃ after manufacturing a PCS molded body using cured PCS powder. Physical and chemical properties were analyzed using a thermogravimetric analyzer (TGA), scanning electron microscope (SEM), energy dispersive spectroscopy (EDS), and universal testing machine (UTM). The prepared SiC block was decomposed into SiO and CO gas as the temperature increased, and β-SiC crystal grains were grown in an amorphous structure. In addition, the density and flexural strength were the highest at 1.9038 g/㎤ and 6.189 MPa of SiC prepared at 1100℃. The manufactured amorphous silicon carbide block is expected to be applicable to other fields, such as the previously reported microwave assisted heating element.
Keywords
Polycarbosilane; SiC; Densification; Amorphous; 3-Point bending test;
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