Deformation mechanism in graphene nanoplatelet reinforced tantalum carbide using high load in situ indentation

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:674

Article

Zhang, Cheng¹  Boesl, Benjamin¹  Silvestroni, Laura²  Sciti, Diletta²  Agarwal, Arvind¹ 

[1] Florida Int Univ, Dept Mech & Mat Engn, Plasma Forming Lab, Miami, FL 33174 USA

[2] CNR ISTEC, Inst Sci & Technol Ceram ISTEC, Via Granarolo 64, I-48018 Faenza, Italy

关键词: High load in situ indentation;    Tantalum Carbide;    Graphene nanoplatelets;    Damaged area;    Interface;   

DOI  :  10.1016/j.msea.2016.07.110

来源: Elsevier

【 摘 要 】

High load in-situ indentation testing with real time SEM imaging was carried out on spark plasma sintered graphene nanoplatelets (GNP) reinforced TaC composites. The prime goal of this study was to understand the deformation behavior and the reinforcing mechanisms of GNPs. The results suggest that addition of GNPs had significant effect on dissipating indentation energy and confining the overall damage area to a localized region of TaC. The average crack length reduced by 26% whereas total damage area shrunk by 85% in TaC-5 vol% GNP sample as compared to pure TaC. TEM analysis concluded that well dispersed GNPs result in a strong and clean interface between TaC and GNP with trace amount of amorphous layer that leads to improved energy dissipation mechanism. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

Free