Počet záznamů: 1
Effect of lateral size of graphene nano-sheets on the mechanical properties and machinability of alumina nano-composites
- 1.
SYSNO ASEP 0457963 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Effect of lateral size of graphene nano-sheets on the mechanical properties and machinability of alumina nano-composites Tvůrce(i) Porwal, H. (GB)
Saggar, Richa (UFM-A)
Tatarko, P. (GB)
Grasso, S. (GB)
Saunders, T. (GB)
Dlouhý, Ivo (UFM-A) RID, ORCID
Reece, M. J. (GB)Celkový počet autorů 7 Zdroj.dok. Ceramics International. - : Elsevier - ISSN 0272-8842
Roč. 42, č. 6 (2016), s. 7533-7542Poč.str. 10 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova Alumina ; Graphene nano-sheets ; Nano-composites ; Mechanical properties ; Machinability Vědní obor RIV JL - Únava materiálu a lomová mechanika Obor OECD Audio engineering, reliability analysis Institucionální podpora UFM-A - RVO:68081723 UT WOS 000372676000120 EID SCOPUS 84956862308 DOI 10.1016/j.ceramint.2016.01.160 Anotace Graphene Nano-Sheets (GNS) with different lateral sizes (193, 373 and 1070 nm) were produced using liquid phase exfoliation and controlled centrifugation. Alumina-GNS (0.8 vol%) composites with different size GNS were consolidated using spark plasma sintering. The fracture toughness, hardness and elastic modulus of the composites decreased with increasing GNS size. Microstructural investigation of the composites suggested that their mechanical properties were directly related to: (1) average number of GNS present per unit volume in composite; and (2) relative size of GNS to alumina grains. Small size GNS resulted in a 35% improvement of fracture toughness of alumina-GNS composite. The mechanism of crack propagation changed as the size of the GNS increased. The smaller size GNS produced various toughening mechanisms, while the larger size GNS, with similar size to the alumina grains, resulted in grain boundary sliding. The composite with larger size GNS was machinable using ordinary tungsten carbide drill bits. Pracoviště Ústav fyziky materiálu Kontakt Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Rok sběru 2017
Počet záznamů: 1