Fabrication and investigation of nano particle, fibre and nanotube multiscale reinforced aluminium matrix composites

纳米粒子、纤维和纳米管多尺度增强铝基复合材料的制备与研究

基本信息

批准号：
RGPIN-2019-05054
负责人：
Nganbe, Michel
金额：
$ 2.04万
依托单位：
University of Ottawa
依托单位国家：
加拿大
项目类别：
Discovery Grants Program - Individual
财政年份：
2021
资助国家：
加拿大
起止时间：
2021-01-01 至 2022-12-31
项目状态：
已结题

来源：
https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=738034
关键词：
Fabrication investigation nano particle fibre

项目摘要

Depleting natural resources and increasing environmental concerns are current major challenges. In addition, increases in mobility, performance, speed and safety are constant demands. These challenges have made high-performance lightweight materials fundamental concepts of today's technology, particularly in automotive, aerospace and defence. Therefore, the proposed research program aims at developing lightweight, gradient, multiscale reinforced aluminium matrix composites using fibres, nanotubes and nanoparticles. A novel and cost efficient laminate squeeze casting technique will be developed. The required squeeze pressure will be achieved using primarily differences in thermal expansions of the set-up components with little to no need for presses or other compaction equipment. This enables easy technology transfer to industry. In this technique, thin pre-fabricated aluminium green layers melt and infiltrate the sandwiched fiber layers over short distances, minimising temperature and pressure drops that are challenges often encountered in standard liquid infiltration using 3D preforms. Research will focus on carbon fiber as primary reinforcement, while carbon and boron nitride nanotube will be studied as reinforcement of the fiber-matrix interface to improve bonding. Additional hardening of the aluminium matrix will be achieved using primarily Al2O3 nanoparticles introduced in the greens by mechanical alloying and powder metallurgy. Functional gradients will be introduced by varying the concentrations of reinforcements across the composite thickness. This will increase the efficiency of the composites by matching properties to specific load distributions across components. The composites will be characterised using optical and scanning electron microscopy as well as X-ray diffraction. Bend and impact testing will be used to study the strength, stiffness, impact fracture resistance and failure modes. To guide further improvements, relationships will be established between fabrication parameters, microstructure, and mechanical properties using physics-based, neural network, finite element and meshless modelling. The proposed research will have a major economic impact for Canada as the world's third largest producer of primary aluminium, with an annual output estimated at 3.2 million tonnes, exports totaling over $12.7 billion in 2017, and over 10,000 direct jobs for primary aluminium production alone. It aims at expanding Canada's capacity to manufacture value-added aluminium products. The emphasis is on new composites for highly demanding applications in automotive, aerospace and defence. Near pressureless fabrication aims at matching manufacturing practices which will facilitate industry adoption and increase the technological impact of metal matrix composites. Overall, the targeted high performance-to-weight ratios will contribute to increased efficiency, mobility and safety as well as to reduced energy consumption and environmental impact.

自然资源的枯竭和日益严重的环境问题是当前的主要挑战，此外，对机动性、性能、速度和安全性的提高也是持续的需求，这些挑战使高性能轻质材料成为当今技术的基本概念，特别是在汽车、航空航天和国防领域。因此，拟议的研究计划旨在开发使用纤维、纳米管和纳米颗粒的轻质、梯度、多尺度增强铝基复合材料，以实现所需的挤压压力。主要利用设置组件的热膨胀差异，几乎不需要压力机或其他压实设备，这使得技术能够轻松转移到工业中，薄的预制铝生坯层会熔化并渗透到夹层纤维层中。在短距离内，最大限度地减少温度和压力下降是使用 3D 预制件的标准液体渗透中经常遇到的挑战。研究将集中于碳纤维作为主要增强材料，而碳和氮化硼纳米管将是主要增强材料。主要使用通过机械合金化和粉末冶金引入的 Al2O3 纳米粒子来增强纤维-基体界面以改善铝基体的额外硬化，并通过改变整个增强体的浓度来引入功能梯度。这将通过将性能与组件之间的特定负载分布相匹配来提高复合材料的效率，并将使用光学和扫描电子显微镜以及 X 射线来表征复合材料。弯曲和冲击测试将用于研究强度、刚度、抗冲击断裂性和失效模式，为了指导进一步的改进，将使用基于物理的神经网络、有限元建立制造参数、微观结构和机械性能之间的关系。拟议的研究将对加拿大作为世界第三大原铝生产国产生重大经济影响，加拿大的年产量估计为 320 万吨，出口总额超过 127 亿美元。 2017 年，仅原铝生产就创造了 10,000 多个直接就业机会，旨在扩大加拿大制造增值铝产品的能力，重点是用于汽车、航空航天和国防领域高要求应用的新型复合材料，旨在实现匹配。总体而言，目标高性能重量比将有助于提高效率、移动性和安全性。减少能源消耗和环境影响。