Properties of Aluminum Nano Composites Bearing Alumina Particles and Multiwall Carbon Nanotubes Manufactured by Mechanical Alloying and Microwave Sintering

Ali Günen; Ömer Saltuk Bölükbaşı; Yasin Özgürlük; Derviş Özkan; Okan Odabaş; İlyas Somunkıran

doi:10.1007/s12540-022-01251-3

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자료유형: 학술저널

저자정보: Ali Günen (Iskenderun Technical University) Ömer Saltuk Bölükbaşı (Iskenderun Technical University) Yasin Özgürlük (Bartın University) Derviş Özkan (Bartın University) Okan Odabaş (Bartın University) İlyas Somunkıran (Fırat University)

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.29 No.3

발행연도: 2023.3

수록면: 748 - 766 (19page)

DOI: 10.1007/s12540-022-01251-3

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This study focused on chromium addition (0 wt%, 3 wt%, 6 wt%, 9 wt% and 12 wt%) on the boride layer formation, microhardness,fracture toughness and elevated temperature friction and wear behaviour of alloys formed by powder metallurgy(P/M). The boride layers obtained on P/M alloys were characterized by examining density, porosity, surface roughness,scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, surface profilometry, microhardness,and fracture toughness. The addition of Cr has a significant effect on both boride layer formation and friction-wearbehaviour of P/M alloys. Increasing the Cr addition up to 6 wt% has an improving effect on the microhardness, fracturetoughness and wear resistance of the P/M alloys, whereas in the case of 9–12 wt% Cr addition causes exfoliation in the boridelayer and low fracture toughness, thus reducing wear resistance. Coefficients of friction and wear volume losses at elevatedtemperatures are higher than room temperature. The best wear resistance at room temperature was obtained in the samplecontaining 3 wt% Cr with the highest fracture toughness, while the best wear resistance at 250 °C and 500 °C was obtainedin the sample containing 6 wt% Cr, where the highest hardness value was obtained.

#Sintering · Boronizing · High-temperature wear · Friction · Powder metallurgy

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