@ARTICLE{Park_Hyun-Kuk_Consolidation_2021, author={Park, Hyun-Kuk and Oh, Ik-Hyun and Kim, Ju-Hun and Hong, Sung-Kil and Lee, Jeong-Han}, volume={vol. 66}, number={No 4}, journal={Archives of Metallurgy and Materials}, pages={997-1000}, howpublished={online}, year={2021}, publisher={Institute of Metallurgy and Materials Science of Polish Academy of Sciences}, publisher={Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences}, abstract={In this study, a novel composite was fabricated by adding the Hafnium diboride (HfB2) to conventional WC-Co cemented carbides to enhance the high-temperature properties while retaining the intrinsic high hardness. Using spark plasma sintering, high density (up to 99.4%) WC-6Co-(1, 2.5, 4, and 5.5 wt. %) HfB2 composites were consolidated at 1300℃ (100℃/min) under 60 MPa pressure. The microstructural evolution, oxidation layer, and phase constitution of WC-Co-HfB2 were investigated in the distribution of WC grain and solid solution phases by X-ray diffraction and FE-SEM. The WC-Co-HfB2 composite exhibited improved mechanical properties (approximately 2,180.7 kg/mm2) than those of conventional WC-Co cemented carbides. The high strength of the fabricated composites was caused by the fine-grade HfB2 precipitate and the solid solution, which enabled the tailoring of mechanical properties.}, type={Article}, title={Consolidation and Oxidation of Ultra Fine WC-Co-HfB2 Hard Materials by Spark Plasma Sintering}, URL={http://www.journals.pan.pl/Content/119286/PDF-MASTER/AMM-2021-4-15-Jeong-Han%20Lee.pdf}, doi={10.24425/amm.2021.136413}, keywords={WC cemented carbide, hafnium diboride, spark plasma sintering, oxidation, mechanical property}, }