By a News Reporter-Staff News Editor at Science Letter -- New research on Carbon Research is the subject of a report. According to news reporting from Brno, Czech Republic, by NewsRx journalists, research stated, "Graphene was prepared using liquid phase exfoliation and dispersed in an alumina matrix using an ultrasonication and powder processing route. Al2O3-graphene composites with up to 5 vol% content were densified (>99%) using SPS."
The news correspondents obtained a quote from the research from the Institute of Physics, "The fracture toughness of the material increased by 40% with the addition of only 0.8 vol% graphene. However for higher graphene contents the improvement in fracture toughness was limited. Graphene changed the mechanism of crack propagation for the alumina matrix from inter-granular to trans-granular. The formation of an inter-connecting graphene network promoted easy fracture for concentration >= 2 vol%. Elastic modulus remained nearly constant for up to 2 vol% and decreased significantly for 5 vol% due to the formation of the inter-connecting graphene network."
According to the news reporters, the research concluded: "Fracture toughness measured with the indentation and chevron notch methods were consistent up to 2 vol% and at 5 vol% the percolating network of graphene resulted in easy crack propagation with significant discrepancy between the results for the two methods."
For more information on this research see: Graphene reinforced alumina nano-composites. Carbon, 2013;64():359-369. Carbon can be contacted at: Pergamon-Elsevier Science Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, England. (Elsevier - www.elsevier.com; Carbon - www.elsevier.com/wps/product/cws_home/258)
Our news journalists report that additional information may be obtained by contacting H. Porwal, CEITEC IPM, ASCR, Inst Phys Mat, Brno 61662, Czech Republic. Additional authors for this research include P. Tatarko, S. Grasso, J. Khaliq, I. Dlouhy and M.J. Reece (see also Carbon Research).
Keywords for this news article include: Brno, Europe, Czech Republic, Carbon Research
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