Microstructural characterization and wear properties of ultra-dispersed nanodiamond (UDD) reinforced Al matrix composites fabricated by ball-milling and sintering

Kaftelen H., Öveçoğlu M. L.

JOURNAL OF COMPOSITE MATERIALS, vol.46, no.13, pp.1521-1534, 2012 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 46 Issue: 13
  • Publication Date: 2012
  • Doi Number: 10.1177/0021998311421636
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1521-1534
  • Karadeniz Technical University Affiliated: No


Elemental aluminum (Al) powders reinforced with 1-10 wt% of ultra-dispersed nanodiamond (UDD) powders were ball-milled in a Spex (TM) Mixer/Mill between 0 and 120 min followed by consolidation and sintering. X-ray diffraction analyses on the ball-milled powders revealed only alpha-Al peaks, whereas Al4C3 phase was identified along with alpha-Al in all sintered composites. Increasing the addition of nanodiamond to Al-matrix resulted in improved hardness of both ball-milled and sintered composites. The wear resistances of the Al-UDD composites were significantly improved with increasing UDD contents. Under similar load and sliding conditions, the wear resistance of Al matrix composite containing 10 wt% nanodiamond enhances about 40 times when compared with unreinforced aluminum.