Record Details

Al2O3 films grown by glow discharge plasma aluminising

DSpace at IIT Bombay

View Archive Info
 
 
Field Value
 
Title Al2O3 films grown by glow discharge plasma aluminising
 
Creator JAMNAPARA, NI
NAYAK, V
AVTANI, DU
CHAUHAN, NL
PANDA, D
GUPTA, SB
KALARIA, K
VAGHELA, N
MUKHERJEE, S
KHANNA, AS
 
Subject Al2O3
Plasma
Aluminising
9Cr steel
Mangetron
RAY PHOTOELECTRON-SPECTROSCOPY
THIN-FILMS
MECHANICAL-PROPERTIES
PERMEATION BARRIERS
THERMAL-STABILITY
OXYGEN PLASMA
COATINGS
OXIDATION
ALUMINUM
DEPOSITION
 
Description Aluminising of 9Cr steel substrates followed by heat treatment has been attempted to generate Al2O3 films along with Fe-Al diffusion zone at the coating/substrate interface. Effect of glow discharge plasma processing on the phase and microstructure of resultant alumina films in comparison with thermally processed samples has been reported. The thermal and plasma treated samples were characterised using X-ray diffraction, scanning electron microscopy-energy dispersive X-ray spectroscopy, electron probe microanalysis, X-ray photoelectron spectroscopy (XPS) and nanoindentation techniques. X-ray diffraction and XPS studies revealed gamma-Al2O3 phase in both thermal and plasma processed samples. The XPS data indicated higher binding energies in plasma processed Al2O3 films as compared to thermally processed Al2O3 films. Scanning electron microscopy observations revealed cracks in thermally grown Al2O3 films while the same was not observed in plasma processed films. The EDX analysis revealed Fe(Al) diffusion layer of similar to 3 mm in plasma processed films while the same was not observed in thermally treated samples. Nanoindentation tests on plasma grown alumina films indicated 16.96 GPa hardness while hardness for thermally grown alumina films was found to be 9.95 GPa. The role of plasma in generating a crack free alumina film has been discussed.
 
Publisher MANEY PUBLISHING
 
Date 2014-12-28T14:58:54Z
2014-12-28T14:58:54Z
2014
 
Type Article
 
Identifier SURFACE ENGINEERING, 30(7)467-474
0267-0844
1743-2944
http://dx.doi.org/10.1179/1743294414Y.0000000267
http://dspace.library.iitb.ac.in/jspui/handle/100/16814
 
Language English