Wear Characteristics of (Al/B4C and Al/TiC) Nanocomposites Synthesized via Powder Metallurgy Method

Author:

Hasan Lamyaa Khaleel1,Jiaad Suaad Makki1,Salman Khansaa Dawood2,Al-Maliki Wisam Abed Kattea34ORCID,Alobaid Falah4ORCID,Epple Bernd4

Affiliation:

1. Department of Electromechanical Engineering, University of Technology-Iraq, Ministry of Higher Education & Scientific Research, Baghdad 10066, Iraq

2. Department of Aeronautical Techniques Engineering, Bilad Alrafidain University College, Diyala 32001, Iraq

3. Mechanical Engineering Department, University of Technology-Iraq, Ministry of Higher Education & Scientific Research, Baghdad 10066, Iraq

4. Institut Energiesysteme und Energietechnik, Technische Universität Darmstadt, Otto-Berndt-Straße 2, 64287 Darmstadt, Germany

Abstract

Objective: The aim of the present work is to study the microstructure, wear behavior, physical properties, and micro-hardness of the aluminum matrix AA6061 reinforced with TiC and B4C nanoparticles with different concentrations of 2.5, 5, 7.5, 10, and 12.5 wt.%. Methodology: Al/B4C and Al/TiC nanocomposites were fabricated with a powder metallurgy route. A dry sliding wear test was performed with a pin-on-disc machine. The wear test was performed at the applied loads of 3, 6, 9, 12, and 15 N at a constant time for about 10 min. The microstructural analysis of the fabricated nanocomposites was examined via field emission scanning electron microscopy (FESEM) and X-ray diffraction (XRD) analysis. The obtained data: The results of this work show that increasing the applied load leads to a decrease in the wear rate of the aluminum matrix and its nanocomposites. The wear rate of the aluminum matrix without any additives is about 7.25 × 10−7 (g/cm), while for Al/TiC and Al/B4C, it is 5.1 × 10−7 (g/cm) and 4.21 × 10−7 (g/cm), respectively. An increment in B4C percent increases the actual density, while an increment in TiC percent minimizes the actual density at 2.90 g/cm3 and 2.51 g/cm3, respectively. An increment in B4C percent decreases by 4.61%, while the porosity slightly increases with increases in TiC percent of 6.2%. Finally, the micro-hardness for Al/B4C is about 92 (HRC), and for Al/TiC, it is about 87.4 (HRC). Originality: In the present work, nanocomposites were fabricated using a powder metallurgy route. Fabricated nanocomposites are important in engineering industries owing to their excellent wear resistance, low thermal distortion, and light weight compared with other nanocomposites. On the other hand, Al/B4C and Al/TiC nanocomposites fabricated with a powder metallurgy route have not previously been investigated in a comparative study. Therefore, an investigation into these nanocomposites was performed.

Publisher

MDPI AG

Subject

Fluid Flow and Transfer Processes,Computer Science Applications,Process Chemistry and Technology,General Engineering,Instrumentation,General Materials Science

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