The Effect of Mechanical Milling on Graphite-Boron Carbide Hybrid Reinforced ZA27 Nanocomposites

Dalmis R., ÇUVALCI H., ÇANAKÇI A., GÜLER O., Celik E.

ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING, vol.43, no.3, pp.1113-1124, 2018 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 43 Issue: 3
  • Publication Date: 2018
  • Doi Number: 10.1007/s13369-017-2708-7
  • Journal Name: ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1113-1124
  • Keywords: Mechanical milling, Hybrid nanocomposite, ZA27 alloy, Hot pressing, METAL-MATRIX COMPOSITES, STRUCTURAL EVOLUTION, POWDER, MICROSTRUCTURE, BEHAVIOR, B4C, ALLOY, NANOPARTICLES, FABRICATION, TIME
  • Karadeniz Technical University Affiliated: Yes

Abstract

The main focus of this study is concentrated on the effect of mechanical milling on graphite-boron carbide hybrid reinforced ZA27 nanocomposites. With this respect, nano-sized graphite (Gr) and boron carbide (C) reinforced ZA27 matrix nanocomposites were fabricated via a combination of mechanical milling (MM) and hot pressing techniques. MM method was used to produce a ZA27-based hybrid nanocomposite (ZHNC) that nano-sized additives dispersed homogenously in ZA27 matrix. Microstructural and mechanical properties of the nanocomposites were scrutinized as a function of milling time using X-ray diffractometer, scanning electron microscope, hardness and tensile testing machines. Results show that MM method can be utilized for homogeneously distributing the nano-sized additives. Flake-shape morphology negatively influences physical and mechanical properties. It was also found that grain and particle size is decreased after 12 h milling process. With increasing MM time, homogeneous microstructure of the nanocomposite bulk materials was obtained and subsequently their mechanical properties were improved considerably.