Microstructure and wear behaviour of graphene-Si3N4 binary particle-reinforced aluminium hybrid composites

Şenel M. C., Gürbüz M.

BULLETIN OF MATERIALS SCIENCE, cilt.43, sa.1, 2020 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 43 Sayı: 1
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1007/s12034-020-02124-4
  • Dergi Adı: BULLETIN OF MATERIALS SCIENCE
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Anahtar Kelimeler: Aluminium, silicon nitride, graphene, composite, wear, TRIBOLOGICAL BEHAVIORS, MECHANICAL-PROPERTIES, SINTERING TIME, NANOSHEETS, CONDUCTIVITY, OPTIMIZATION, TEMPERATURE, PERFORMANCE, FRICTION, HARDNESS
  • Ondokuz Mayıs Üniversitesi Adresli: Evet

Özet

In this study, Si3N4 and graphene-reinforced aluminium matrix composites (AMCs) with various contents (Si3N4: 1, 3, 6, 9 wt%; graphene: 0.1, 0.3, 0.5 wt%) were produced by the powder metallurgy method. The phase and microstructure analyses of the composites were performed by X-ray diffractometry and scanning electron microscopy, respectively. To investigate the tribological behaviour of Al-Si3N4 and Al-Si3N4-graphene composites, pin-on-disc experiments were conducted with different loads (F = 10, 20 and 30 N) at a constant sliding speed (200 rpm). Thus, the effects of Si3N4 and graphene contents on microstructure, Vickers hardness, apparent density, porosity, wear rate and friction coefficient of AMCs were investigated. Test results reveal that the highest Vickers hardness (66 +/- 1 HV), the lowest porosity (5.6%), wear rate (3.1 x 10(-5) mm(3) N-1 m(-1)) and friction coefficient (0.13) were obtained for Al-9Si(3)N(4)-0.1 graphene. After attaining 0.1% graphene content, agglomeration was detected from the microstructure images of Si3N4-graphene-reinforced AMCs. It was concluded that Si3N4 had an outstanding wear resistance and graphene was a good solid lubricant for AMCs.