Subscribe Now Subscribe Today
Science Alert
 
Blue
   
Curve Top
Journal of Applied Sciences
  Year: 2008 | Volume: 8 | Issue: 20 | Page No.: 3727-3732
DOI: 10.3923/jas.2008.3727.3732
 
Facebook Twitter Digg Reddit Linkedin StumbleUpon E-mail

Effect of Silicon on Nanostructure TiAl(γ) Formation Kinetic via Mechanical Alloying Method

R.A. Khosroshahi, N.P. Ahmadi and S. Samadzadeh

Abstract:
With the aim of studying the effect of Si on Mechanical Alloying (MA) process of TiAl (γ) intermetallic compound, two compositional powder blends of Ti-50Al(at%) and Ti-48Al-2.4Si(at%) were mechanically alloyed in a planetary ball mill. The structural evaluation in these powders was done by X-Ray Diffraction (XRD) technique and Scanning Electron Microscopy (SEM). It was found that elemental powders were progressively transformed into nanocrystalline Ti solid solution and amorphous phases during MA process. The time required for Ti solid solution or amorphous phase formation was longer in Si containing powders. While annealing of the mechanically alloyed Ti-50Al powders at 900°C for 10 min leads to the nanocrystalline phase of TiAl(γ), nanocrystalline phases of mainly TiAl(γ) together with some silicides and Ti3Al(α2) phase were formed in Si containing powders. Annealing at higher temperature of 1150°C leads unstable silicides to be transformed into more stable ζ-Ti5Si3 phase.
PDF Fulltext XML References Citation Report Citation
 RELATED ARTICLES:
  •    A New Model in Glass Forming Range of Binary Alloys
  •    Simulation of n1-p2 Microcrystalline Silicon Tunnel Junction with AMPS-1D in a-Si :H/μc-Si :H Tandem Solar Cells
How to cite this article:

R.A. Khosroshahi, N.P. Ahmadi and S. Samadzadeh, 2008. Effect of Silicon on Nanostructure TiAl(γ) Formation Kinetic via Mechanical Alloying Method. Journal of Applied Sciences, 8: 3727-3732.

DOI: 10.3923/jas.2008.3727.3732

URL: https://scialert.net/abstract/?doi=jas.2008.3727.3732

COMMENT ON THIS PAPER
 
 
 

 

 
 
 
 
 
 
 
 
 

 
 
 
 
 
 
 

Curve Bottom