An Al matrix composite reinforced with carbon nanotubes, Al3BC, and γ-Al2O3: Investigation of mechanical, thermal, and wear resistance properties

IF 5.5 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING Materials Characterization Pub Date : 2025-02-15 DOI:10.1016/j.matchar.2025.114854

Jingyi Hu, Tong Gao, Guiliang Liu, Jingbin Liu, Wenhua Xu, Xiangfa Liu

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Abstract

Carbon nanotubes (CNTs), with their exceptional theoretical modulus of elasticity, are among the most promising materials for reinforcing aluminum matrix composites. However, weak mechanical bonds formed between CNTs and the matrix, along with the formation of the brittle Al₄C₃ phase at the interface, often result in a deterioration of the composite's mechanical properties. In this study, a (CNTs+Al₃BC + Al₂O₃)/Al-Zn-Cu composite was fabricated through ball milling, sintering, hot extrusion, and solution treatment. The resulting composite exhibits Young's modulus of 98.1 GPa and ultimate tensile strength of 536 MPa, along with improved thermal properties and wear resistance. The primary strengthening mechanism includes the reinforcement provided by in-situ γ-Al₂O₃ and the CNTs encased by high-modulus in-situ generated Al₃BC particles. This research offers novel insights for the design of high-modulus, high-strength synergistic Al-CNTs composites.

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碳纳米管、Al3BC和γ-Al2O3增强铝基复合材料的力学、热、耐磨性能研究

碳纳米管（CNTs）具有优异的理论弹性模量，是增强铝基复合材料最有前途的材料之一。然而，CNTs与基体之间形成弱的机械键，并在界面处形成脆性的Al₄C₃相，往往导致复合材料的力学性能恶化。通过球磨、烧结、热挤压和固溶处理制备了（CNTs+Al₃BC + Al2O3）/Al- zn - cu复合材料。该复合材料的杨氏模量为98.1 GPa，极限抗拉强度为536 MPa，热性能和耐磨性均得到改善。初级强化机制包括原位生成的γ-Al₂O₃和高模量原位生成的Al₃BC颗粒包裹的CNTs。该研究为高模量、高强度协同Al-CNTs复合材料的设计提供了新的见解。

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来源期刊

Materials Characterization 工程技术-材料科学：表征与测试

CiteScore

7.60

自引率

8.50%

发文量

746

审稿时长

36 days

期刊介绍： Materials Characterization features original articles and state-of-the-art reviews on theoretical and practical aspects of the structure and behaviour of materials. The Journal focuses on all characterization techniques, including all forms of microscopy (light, electron, acoustic, etc.,) and analysis (especially microanalysis and surface analytical techniques). Developments in both this wide range of techniques and their application to the quantification of the microstructure of materials are essential facets of the Journal. The Journal provides the Materials Scientist/Engineer with up-to-date information on many types of materials with an underlying theme of explaining the behavior of materials using novel approaches. Materials covered by the journal include: Metals & Alloys Ceramics Nanomaterials Biomedical materials Optical materials Composites Natural Materials.