Synthesis of aluminium (Al) and alumina (Al2O3)-based graded material by gravity casting

IF 1.6 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

High Temperature Materials and Processes Pub Date : 2024-01-01 DOI:10.1515/htmp-2022-0308

Puneet Singh, Krishna Kant Singh Mer, Satyendra Singh

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引用次数: 0

Abstract

In the present work, aluminium alloy-based composites were developed for automobile applications. Aluminium-based functionally graded material (FGM) was developed by adding 2.5, 5 and 7.5 wt% of nanoparticles of alumina. The composites were made using gravity casting in an open hearth furnace with the surface temperature of FGM maintained at 750, 850 and 1,000°C. The microstructure of the samples was studied using scanning electron microscopy and particle distribution. The particle distribution was higher at the bottom in all compositions, which can be attributed to more solidification time. As the wt% of the Al2O3 increased, the volume fraction of particles also increased from the top surface to the bottom surface of the samples. After adding 7.5 wt% of Al2O3 and heating up to 1,000°C led to the grain refinement of the alloy. The increase in hardness from the top surface to the bottom surface of the sample verified the development of FGM. Due to increase in the solidification temperature, better reinforcement was observed in the developed FGM.

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通过重力铸造合成以铝（Al）和氧化铝（Al2O3）为基础的分级材料

在本研究中，开发了用于汽车的铝合金基复合材料。通过添加 2.5、5 和 7.5 wt%的纳米氧化铝颗粒，开发出了铝基功能分级材料（FGM）。复合材料是在露天炉中采用重力铸造法制成的，FGM 的表面温度分别保持在 750、850 和 1000°C。利用扫描电子显微镜和颗粒分布研究了样品的微观结构。在所有成分中，底部的颗粒分布较多，这可能是因为凝固时间较长。随着 Al2O3 wt% 的增加，颗粒的体积分数也从样品的顶部表面增加到底部表面。添加 7.5 wt% 的 Al2O3 并加热至 1,000°C 后，合金的晶粒细化。从样品顶面到底面的硬度增加验证了 FGM 的发展。由于凝固温度的升高，在形成的 FGM 中观察到了更好的强化。

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来源期刊

High Temperature Materials and Processes 工程技术-材料科学：综合

CiteScore

2.50

自引率

0.00%

发文量

审稿时长

3.9 months

期刊介绍： High Temperature Materials and Processes offers an international publication forum for new ideas, insights and results related to high-temperature materials and processes in science and technology. The journal publishes original research papers and short communications addressing topics at the forefront of high-temperature materials research including processing of various materials at high temperatures. Occasionally, reviews of a specific topic are included. The journal also publishes special issues featuring ongoing research programs as well as symposia of high-temperature materials and processes, and other related research activities. Emphasis is placed on the multi-disciplinary nature of high-temperature materials and processes for various materials in a variety of states. Such a nature of the journal will help readers who wish to become acquainted with related subjects by obtaining information of various aspects of high-temperature materials research. The increasing spread of information on these subjects will also help to shed light on relevant topics of high-temperature materials and processes outside of readers’ own core specialties.