Shon, In-Jin Yoon, Jin-Kook Hong, Kyung-Tae 2024-01-20T00:33:26Z 2024-01-20T00:33:26Z 2021-09-05 2017-09 1738-8228 https://pubs.kist.re.kr/handle/201004/122317 Since their development in the 1970s ZrO2 ceramics have been shown to be promising alternative materials for total hip arthroplasty (THA) and total knee arthroplasty (TKA). However, ZrO2 is so brittle that in vivo failure can result from fracture of the ceramic femoral head and fracture of the ceramic acetabular liner due to the low toughness of the ceramics. To improve its fracture toughness, the approach commonly utilized has been the addition of a second phase to form a composite and produce nanostructured materials. The purpose of this study was to produce a mechanical synthesis of CoZr and ZrO2 nanopowders from CoO and Zr powders, and fabricate dense nanocrystalline 2CoZr-ZrO2 composites within two minutes using this pulsed current activated sintering method. Their mechanical properties, biocompatibility and microstructure were then evaluated. Nanopowders of CoZr and ZrO2 were synthesized mechanochemically according to the reaction (2 CoO + 3 Zr -> 2CoZr + ZrO2) from CoO and Zr powders by high-energy ball milling. The synthesized powders were consolidated by the pulsed current activated sintering method within two minutes under 80Mpa pressure. CoZr and ZrO2 composite was sintered by the rapid heating of the nanophase. The hardness and fracture toughness of the 2 CoZr-ZrO2 composite in this study were better than the hardness of monolithic CoZr and the fracture toughness of a monolithic ZrO2. Additionally, the 2 CoZr-ZrO2 composite exhibited good biocompatibility. Korean KOREAN INST METALS MATERIALS MECHANICAL-PROPERTIES CONSOLIDATION Sintering of a Nanostmctuttd CoZr-ZrO2 Composite from Mechanochemically Synthesized Powders Article 10.3365/KJMM.2017.55.9.632 1 KOREAN JOURNAL OF METALS AND MATERIALS, v.55, no.9, pp.632 - 636 KOREAN JOURNAL OF METALS AND MATERIALS 55 9 632 636 scie scopus kci ART002252079 000409399900005 2-s2.0-85030703733 Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Materials Science Metallurgy & Metallurgical Engineering Article MECHANICAL-PROPERTIES CONSOLIDATION sintering composite synthesis mechanical properties nanomaterials