Toughened and machinable glass matrix composites reinforced with graphene and graphene-oxide nano platelets

Porwal H, Tatarko P, Grasso S, Hu C, Boccaccini AR, Dlouhy I, Reece MJ (2013)

Publication Type: Journal article

Publication year: 2013

Journal

Science and Technology of Advanced Materials National Institute for Materials Science (NIMS) / Elsevier

Publisher: National Institute for Materials Science (NIMS) / Elsevier

Book Volume: 14

Article Number: 055007

Journal Issue: 5

DOI: 10.1088/1468-6996/14/5/055007

Abstract

The processing conditions for preparing well dispersed silica-graphene nanoplatelets and silica-graphene oxide nanoplatelets (GONP) composites were optimized using powder and colloidal processing routes. Fully dense silica-GONP composites with up to 2.5 vol% loading were consolidated using spark plasma sintering. The GONP aligned perpendicularly to the applied pressure during sintering. The fracture toughness of the composites increased linearly with increasing concentration of GONP and reached a value of ∼0.9 MPa m 1/2 for 2.5 vol% loading. Various toughening mechanisms including GONP necking, GONP pull-out, crack bridging, crack deflection and crack branching were observed. GONP decreased the hardness and brittleness index (BI) of the composites by ∼30 and ∼50% respectively. The decrease in BI makes silica-GONP composites machinable compared to pure silica. When compared to silica-Carbon nanotube composites, silica-GONP composites show better process-ability and enhanced mechanical properties. © 2013 National Institute for Materials Science.

Authors with CRIS profile

Aldo Boccaccini Lehrstuhl für Werkstoffwissenschaften (Biomaterialien)

Involved external institutions

Queen Mary, University of London GB United Kingdom (GB) Academy of Sciences of the Czech Republic (ASCR) / Akademie věd České republiky (AVČR) CZ Czech Republic (CZ) Chinese Academy of Sciences (CAS) / 中国科学院 CN China (CN)

How to cite

APA:

Porwal, H., Tatarko, P., Grasso, S., Hu, C., Boccaccini, A.R., Dlouhy, I., & Reece, M.J. (2013). Toughened and machinable glass matrix composites reinforced with graphene and graphene-oxide nano platelets. Science and Technology of Advanced Materials, 14(5). https://dx.doi.org/10.1088/1468-6996/14/5/055007

MLA:

Porwal, Harshit, et al. "Toughened and machinable glass matrix composites reinforced with graphene and graphene-oxide nano platelets." Science and Technology of Advanced Materials 14.5 (2013).

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