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.

当前的主要挑战是耗尽自然资源并增加环境问题。此外，移动性，性能，速度和安全性的提高是持续的需求。这些挑战使高性能轻巧的材料的基本概念是当今技术的基本概念，尤其是在汽车，航空航天和防御方面。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，多尺寸增强铝基质组成。将开发一种新颖且具有成本效益的薄挤压铸造技术。使用几乎不需要压力或其他压实设备的设置组件的热膨胀中的主要差异，将达到所需的压力压力。这使技术可以简单地转移到行业。在这项技术中，薄薄的预制铝绿色层融化并在短距离内浸润夹层纤维层，最大程度地减少了使用3D预形式在标准液体渗透中经常遇到的挑战的温度和压降。研究将集中于碳纤维作为主要加固，而碳和硝酸硼纳米管将被研究为纤维 - 矩阵界面的增强，以改善粘结。使用机械合金和粉末冶金中引入的原代Al2O3纳米颗粒将实现铝基质的额外硬化。功能梯度将通过改变整个复合厚度的增援浓度来引入。这将通过将属性与跨组件的特定负载分布相匹配，从而提高组合物的效率。将使用光学和扫描电子显微镜以及X射线衍射来表征组成。弯曲和冲击测试将用于研究强度，刚度，冲击裂缝抗性和故障模式。为了指导进一步的改进，将使用基于物理的神经网络，有限元和无网格建模之间的制造参数，微结构和机械性能之间建立关系。拟议的研究将对加拿大作为全球第三大原铝生产国产生重大的经济影响，估计年产率为320万吨，2017年出口总计超过127亿美元，仅原发性铝生产的直接工作量超过10,000个。它旨在扩大加拿大生产增值铝产品的能力。重点是在汽车，航空航天和防御方面高度苛刻的应用新构图。近乎压力的制造旨在匹配制造实践，这将有助于行业采用并增加金属基质组成的技术影响。总体而言，有针对性的高性能比率将有助于提高效率，活动性和安全性，并减少能耗和环境影响。