Nanodynamic mechanical behavior of graphene nanoplatelet-reinforced tantalum carbide
Nanodynamic mechanical behavior of graphene nanoplatelet-reinforced tantalum carbide
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DOI：
10.1016/j.scriptamat.2013.07.030
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发表时间：
2013-11-01
影响因子：
6
通讯作者：
Agarwal, Arvind
中科院分区：
文献类型：
--
作者：
Nieto, Andy;Lahiri, Debrupa;Agarwal, Arvind
对石墨烯纳米片（GNPs）增强的火花等离子烧结碳化钽复合材料进行了纳米动态力学分析（nanoDMA）。GNPs的加入将25-100 Hz频率下的阻尼（tan delta）提高了300%。它还通过能量耗散机制（如GNP弯曲、扭结和滑动）改善了阻尼行为。提出了阻尼性能改善与断裂韧性之间的关系模型。当GNPs均匀分散时，GNP能量耗散机制在改善阻尼行为方面最有效。(C) 2013材料学报Elsevier Ltd.出版。版权所有。
Nanodynamic mechanical analysis (nanoDMA) is performed on spark plasma sintered tantalum carbide composites reinforced with graphene nanoplatelets (GNPs). The addition of GNPs enhances damping (tan delta) at 25-100 Hz frequencies by up to 300%. It also improves damping behavior through energy-dissipating mechanisms, such as GNP bending, kinking and sliding. A model for correlating improvement in the damping behavior with the fracture toughness is presented. GNP energy-dissipating mechanisms are most effective in improving damping behavior when GNPs are dispersed uniformly. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.