Srivastava, V C and Uhlenwinkel, V and Schulz, A and Zoch, H -W and Mukhopadhyay, N K and Ghosh Chowdhury, S (2008) Synthesis of the Single Phase i-AlCuFe Bulk Quasicrystal by Spray Forming. In: Tenth international conference on Quasicrystals (ICQ10), July 7-11, 2008, Zurich, Switzerland.
In the present study, an icosahedral single phase bulk quasicrystalline material based on Al62Cu25.5Fe12.5 has been synthesised by a spray forming route. Microstructural characterization showed an average grain size of 10 m. The oversprayed fine powder showed the presence of - and -phases, whereas, the deposit consited of the fully single phase bulk quasicrystalline material with compositional homogeneity. The hardness and fracture toughness measurements were carried out at different indentation loads of 50-500 g. The hardness values varied in the range 10.4-8.1 GPa and fracture toughness was seen to decrease with increasing load. The varionan of hardness with load, which is known as indentation size effect (ISE) has been established clearly. Fracture toughness value was constant in the load range from 200 to 500 g at 1.2 MPa.m1/2. The cracking pattern after indentation at higher has been observed to be intergranular as well as transgranular. The evolution of the single phase bulk quasicrystalline material has been discussed in light of the unique combination of atomization and deposition process elements in spray forming technique.
|Item Type:||Conference or Workshop Item (Poster)|
|Uncontrolled Keywords:||spray forming, bulk quasicrystals, single phase, AlCuFe|
|Divisions:||Metal Extraction and Forming|
|Deposited By:||Dr. V.C. Srivastava|
|Deposited On:||09 Jul 2012 08:51|
|Last Modified:||14 May 2013 09:33|
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