Nanocrystalline Ni3Al-based alloys produced by mechanical alloying of Ni-Al-Co powders and consolidation

Anna Antolak-Dudka ,  Marek Krasnowski ,  Tadeusz Kulik 

Warsaw University of Technology, Faculty of Materials Science and Engineering, Woloska 141, Warsaw 02-507, Poland

Abstract

In this work, preparation of nanocrystalline Ni3Al-based alloys by mechanical alloying process followed by hot-pressing consolidation is reported. Ni75Al20Co5 and Ni70Al25Co5 elemental powder mixtures were subjected to ball milling. Subsequently, the milling products were sintered at 1000oC under a pressure of 7.7 GPa. The powders and the consolidated pellets were investigated by X-ray diffraction. The results obtained show that the milling products were in both cases supersaturated solid solutions Ni(Al,Co) and that during hot-pressing consolidation they had transformed into nanocrystalline Ni3Al-based intermetallic compounds. The microhardness of the produced Ni3Al-based alloys is 920 HV0.1 in the case of Ni75Al20Co5 composition and 1030 HV0.1 in the second case. The density of compacted materials is close to the theoretical value and their open porosity is negligible.

 

Related papers
  1. "Magnetically soft nanomaterials for high-temperature applications"
  2. Amorphous Al60Fe20Ti20 alloy obtained by consolidation of mechanically alloyed powder
  3. Structure and magnetic properties of Fe-Nb-B amorphous/nanocrystalline alloys produced by compaction of mechanically alloyed powders
  4. Formation and properties of the Cu-Zr-Ag-Ti bulk metallic glasses
  5. Bulk nanocrystalline Al-Si-Fe-mischmetal (Mm) alloys produced by high pressure hot compaction
  6. Amorphous Ni59Zr20Ti16M5 (M = Cu, Ag) alloys obtained by melt spinning and mechanical alloying
  7. Influence of Fe and Ag addition on the amorphization and thermal stability of CuTiZrNi powders processed by mechanical alloying
  8. An attempt to improve the soft magnetic properties of iron-based bulk metallic glasses by annealing
  9. Influence of high presure hot compaction on microstructure of Al-Si-Ni-Mm alloys
  10. Phase transformations during mechanical alloying of nickel aluminides and subsequent heating of milling product
  11. Phase transformations in M2 steel powders subjected to ball milling
  12. Dependence of microhardness on annealing time of amorphous Al-Mm-Ni-(Fe,Co) alloys
  13. Bulk nanostructured Al-Mm-Ni-(Fe,Co) alloys produced by high-pressure hot compaction of amorphous powders
  14. Crystallization kinetics of Al95-x-yMmxNi5(Co,Fe)y series (x = 4, 5; y = 2, 3)
  15. Amorphous bulk alloys from Al-Mm-Ni system

Presentation: Poster at E-MRS Fall Meeting 2009, Symposium H, by Anna Antolak-Dudka
See On-line Journal of E-MRS Fall Meeting 2009

Submitted: 2009-05-21 14:07
Revised:   2009-06-07 00:48