Effect of SiO2 Surface Oxidation Coating of Silicon Carbide Particles Reinforcement on the Mechanical Properties of Al-2.5%Mg/xSiCp Developed by Stir Casting Method

IF 1.1 Q3 METALLURGY & METALLURGICAL ENGINEERING
A. Ambali, O. A. Oyelaran, Bukola Olalekan Bolaji, I. Abdulmalik, Olayiwola Abdulrafiu Suleiman, Usman Hamza Ibrahim
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引用次数: 0

Abstract

The literature revealed that composites developed through stir casting process suffer some limitations such as low wettability and insufficient bonding between the molten Al and SiCp and the formation of aluminium carbide (Al4C3) at the interface which degrades mechanical performances of the composites. To overcome these challenges, this study used magnesium for improved wettability, heat treatment of reinforcement particles (SiCp) and application of metallic (SiO2) coating on the SiCp before addition to melt to improve Al-SiCp wettability in the manufacture of Al-2.5%Mg/xSiCp composites. The SiCp coating reduce direct interaction and promote wetting between SiCp and molten Al to developed Al-2.5%Mg/xSiCp composites. The percentage weight of SiCp varied from 5 wt% to 20 wt% (uncoated and coated) at 5 % intervals. The mechanical properties tests were conducted to examined the effects of coating and variation of volume percentage of SiCp on the composites developed. The results obtained showed that the reinforced alloy with both uncoated and coated SiCp performed favorably well compared to the control sample with 0% SiCp. The improvement of interfacial strength was observed in the composites developed with coated SiCp as the coating of SiCp enhanced its diffusion with Al-2.5%Mg.
碳化硅颗粒表面氧化涂层对搅拌铸造Al-2.5%Mg/xSiCp力学性能的影响
研究表明,采用搅拌铸造工艺制备的复合材料存在一定的局限性,如润湿性低,Al与SiCp之间的结合不充分,在界面处形成碳化物(Al4C3),从而降低了复合材料的力学性能。为了克服这些挑战,本研究在制造Al-2.5%Mg/xSiCp复合材料时,使用镁来改善润湿性,对增强颗粒(SiCp)进行热处理,并在SiCp上涂上金属(SiO2)涂层,然后加入熔体,以改善Al-SiCp的润湿性。SiCp涂层减少了SiCp与熔融Al之间的直接相互作用,促进了其润湿,形成了Al-2.5% mg /xSiCp复合材料。SiCp的重量百分比以5%的间隔从5wt %变化到20wt %(未包覆和包覆)。通过力学性能试验考察了涂层和SiCp体积百分比变化对复合材料力学性能的影响。结果表明,与未涂覆SiCp和涂覆SiCp的对照样品相比,未涂覆SiCp的增强合金的性能都优于未涂覆SiCp的增强合金。SiCp涂层增强了其在Al-2.5%Mg中的扩散,从而提高了复合材料的界面强度。
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来源期刊
Acta Metallurgica Slovaca
Acta Metallurgica Slovaca METALLURGY & METALLURGICAL ENGINEERING-
CiteScore
2.00
自引率
30.00%
发文量
22
审稿时长
12 weeks
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