铝基复合材料中碳纳米管长度相关的界面反应及其强化效应

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon Pub Date : 2025-04-21 DOI:10.1016/j.carbon.2025.120353

Lin Cao , Min Guo , Jie Wan , Jianghua Shen , Shufeng Li , Jinshan Li , Biao Chen

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引用次数: 0

摘要

界面反应是影响碳纳米管在金属基复合材料中强化效果的关键因素。本文研究了碳纳米管长度对铝基复合材料中界面碳化铝（Al4C3）形貌和形成机理的影响。通过观察不同宽高比CNTs增强的Al复合材料中大量的Al4C3，可以识别出3种形态（skinny，孪晶，chunky）。对这三种Al4C3中间反应产物的分析表明，它们的长度随着碳纳米管长度的增加而增加，但它们的形态与碳纳米管长度的关系较弱。形貌由CNTs的分散状态、Al4C3的成核位置和元素扩散方式决定。对于棒状细晶Al4C3和孪晶Al4C3，分别确定了碳原子扩散机制和碳模板生长机制。块状Al4C3与孪生Al4C3在碳纳米管簇上形成时具有相似的形成机制。深入讨论了三种不同长度界面Al4C3的生长过程和强化效果。该研究可为控制纳米碳增强铝基复合材料的界面以获得优异的性能提供指导。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Carbon-nanotube-length dependent interfacial reaction in aluminum matrix composites and its effect on strengthening

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Carbon-nanotube-length dependent interfacial reaction in aluminum matrix composites and its effect on strengthening

The interfacial reaction is a critical factor affecting the strengthening effect of carbon nanotubes (CNTs) in metal matrix composites. In this work, the effects of CNT length on the morphology and formation mechanism of interfacial aluminum carbide (Al₄C₃) in aluminum (Al) matrix composites were investigated. By observing a vast number of Al₄C₃ in Al composites which were reinforced with CNTs by different aspect ratios, three kinds of morphologies (skinny, twinned and chunky) were identified. Analyses on intermediate reaction products of these three kinds of Al₄C₃ revealed that their length increased with the increase of CNT length, but their morphologies had a weak relationship with CNT length. The morphologies were determined by the dispersion state of CNTs, the nucleation sites of Al₄C₃ and element diffusion modes. Both the two debating mechanisms for Al₄C₃ formation, viz., carbon-atom-diffusion mechanism and carbon-template-growth mechanism, were confirmed for the rod-shaped skinny and twinned Al₄C₃, respectively. Chunky Al₄C₃ shared a similar formation mechanism with twinned Al₄C₃ while it formed at CNT cluster. The growing process and strengthening effects of the three kinds of interfacial Al₄C₃ with different lengths were thoroughly discussed. This study may provide guidance to control the interface in nano-carbon-reinforced Al matrix composites for superior properties.

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来源期刊

Carbon 工程技术-材料科学：综合

CiteScore

20.80

自引率

7.30%

发文量

审稿时长

23 days

期刊介绍： The journal Carbon is an international multidisciplinary forum for communicating scientific advances in the field of carbon materials. It reports new findings related to the formation, structure, properties, behaviors, and technological applications of carbons. Carbons are a broad class of ordered or disordered solid phases composed primarily of elemental carbon, including but not limited to carbon black, carbon fibers and filaments, carbon nanotubes, diamond and diamond-like carbon, fullerenes, glassy carbon, graphite, graphene, graphene-oxide, porous carbons, pyrolytic carbon, and other sp2 and non-sp2 hybridized carbon systems. Carbon is the companion title to the open access journal Carbon Trends. Relevant application areas for carbon materials include biology and medicine, catalysis, electronic, optoelectronic, spintronic, high-frequency, and photonic devices, energy storage and conversion systems, environmental applications and water treatment, smart materials and systems, and structural and thermal applications.