INVESTIGATION ON MECHANICAL PROPERTIES AND MICROSTRUCTURES OF ALUMINUM HYBRID COMPOSITES REINFORCED WITH Al<sub>2</sub>O<sub>3</sub>/GNPs BINARY PARTICLES

Şenel M. C., Gurbuz M.

ARCHIVES OF METALLURGY AND MATERIALS, cilt.66, sa.1, ss.97-106, 2021 (SCI-Expanded, Scopus) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 66 Sayı: 1
  • Basım Tarihi: 2021
  • Doi Numarası: 10.24425/amm.2021.134764
  • Dergi Adı: ARCHIVES OF METALLURGY AND MATERIALS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Communication Abstracts, Compendex, Metadex, Directory of Open Access Journals, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.97-106
  • Anahtar Kelimeler: composite, aluminum, graphene, alumina, hybrid, GRAPHENE-NANOSHEETS, POWDER, TEMPERATURE, BEHAVIOR, WEAR, HARDNESS
  • Ondokuz Mayıs Üniversitesi Adresli: Evet

Özet

Nowadays, aluminum-based composites have been produced by pure alumina (Al2O3) or pure graphene nanoplatelets (GNPs) in aluminum matrix because of the high compressive stgength of alumina and the solid lubricant properties of graphene. However, there are no studies on the influence of both alumina and graphene reinforced aluminum composites. In this study, Al-Al2O3 and Al-Al2O3-GNPs composites were reinforced with pure alumina (between 0 and 30 wt.%), pure graphene (0, 0.1, 0.3, 0.5 wt.%), and their hybrid fonns (Al2O3-GNPs) by the powder metallurgy method. This method involved ultrasonic dispensing, mixing, filtering, drying, pressing, and sintering processes. From the test results, the micro Vickers hardness of pure aluminum (28.2 +/- 1 HV) improved to 51.5 +/- 0.8 HV (Al-30Al(2)O(3)) and 63.1 +/- 1 HV (Al-30Al(2)O(3)-0.1GNPs). Similarly, the ultimate compressive strength (UCS) enhanced from 92.4 +/- 4 MPa (pure aluminum) to 165 +/- 4.5 MPa (Al-30Al(2)O(3)) and 188 +/- 5 MPa (Al-30Al(2)O(3)-0.1 GNPs), respectively. In conclusion, the Vickers hardness and ultimate compressive strength of aluminum hybrid composites improved up to 0.1 wt.% graphene content. After 0.1 wt.% graphene content, these mechanical properties decreased because of the clumping of graphene nanoparticles.