Effect of SiO2 Coating on Microstructure and Mechanical Behavior of Al-ABOw Composite Synthesized by Powder Metallurgy Technique

IF 1.5 4区材料科学 Q3 MATERIALS SCIENCE, CERAMICS

Transactions of the Indian Ceramic Society Pub Date : 2020-10-01 DOI:10.1080/0371750x.2020.1798815

Neeraj Pandey, S. Ram, I. Chakrabarty, M. R. Majhi

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引用次数: 1

Abstract

In this investigation, powder metallurgy route was employed to synthesize SiO2 (5, 10 and 15 vol%) coated aluminium borate whisker (ABOw) reinforced aluminium composites. Commercial pure aluminium powder was used as matrix material and SiO2 coated ABOw was used as reinforcements. M icrostructures of the composites were characterized using scanning electron microscopy and high resolution scanning electron microscopy. Energy dispersive spectroscopy was employed to confirm the weight percentages of elements present in the composites. Transmission electron microscopic analysis was performed to observe morphological changes in the composites. X-ray diffraction analysis was carried out to confirm the phases of developed reinforcement and composites. A universal testing machine was employed for the observation of mechanical properties, viz. flexural strength, Young’s modulus and diametral compressive strength, and it was found that the mechanical strength improved by 50-55% in the case of 10 vol% SiO2 coated Al-ABOw composite. The effect of SiO2 coating on the hardness of fabricated composite was also evaluated and the maximum microhardness value was observed to be 46.2 HV in 10 vol% SiO2 coated composite. Themicrostructural analysis showed that excellent grain refined structures with improved mechanical strength were obtained. GRAPHICAL ABSTRACT

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SiO2涂层对粉末冶金Al-ABOw复合材料组织和力学性能的影响

采用粉末冶金方法合成了SiO2(5、10和15 vol%)包覆硼酸铝晶须(ABOw)增强铝复合材料。以工业纯铝粉为基体材料，以SiO2包覆的ABOw为增强材料。利用扫描电镜和高分辨率扫描电镜对复合材料的微观结构进行了表征。利用能量色散光谱法确定了复合材料中各元素的重量百分比。透射电镜观察了复合材料的形貌变化。通过x射线衍射分析确定了发育的增强体和复合材料的物相。采用万能试验机对Al-ABOw复合材料的抗弯强度、杨氏模量和直径抗压强度等力学性能进行了观察，结果表明，包覆10 vol% SiO2的Al-ABOw复合材料的力学强度提高了50 ~ 55%。研究了SiO2涂层对复合材料硬度的影响，结果表明，10 vol% SiO2涂层复合材料的显微硬度最高可达46.2 HV。显微组织分析表明，该材料具有优良的晶粒细化组织，机械强度有所提高。图形抽象

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来源期刊

Transactions of the Indian Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

2.40

自引率

8.30%

发文量

审稿时长

2.3 months

期刊介绍： Transactions of the Indian Ceramic Society is a quarterly Journal devoted to current scientific research, technology and industry-related news on glass and ceramics. The Journal covers subjects such as the chemical, mechanical, optical, electronic and spectroscopic properties of glass and ceramics, and characterization of materials belonging to this family. The Editor invites original research papers, topical reviews, opinions and achievements, as well as industry profiles for publication. The contributions should be accompanied by abstracts, keywords and other details, as outlined in the Instructions for Authors section. News, views and other comments on activities of specific industries and organizations, and also analyses of industrial scenarios are also welcome.

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