Open Access System for Information Sharing

Login Library

 

Article
Cited 34 time in webofscience Cited 0 time in scopus
Metadata Downloads

Correlation of microstructure and wear resistance of Al2O3-TiO2 coatings plasma sprayed with nanopowders

Title
Correlation of microstructure and wear resistance of Al2O3-TiO2 coatings plasma sprayed with nanopowders
Authors
Ahn, JHwang, BSong, EPLee, SKim, NJ
POSTECH Authors
Lee, SKim, NJ
Date Issued
Jan-2006
Publisher
MINERALS METALS MATERIALS SOC
Abstract
Correlation of microstructure and wear resistance of Al2O3-TiO2 coatings plasma sprayed with nanopowders was investigated in this study. Four kinds of nanostructured Al2O3-13 wt pct TiO2 coatings were fabricated by varying plasma-spraying parameters and were compared with an Al2O3-13 wt pct TiO2 coating fabricated with conventional powders. The nanostructured coatings showed a bimodal microstructure composed of fully melted regions of gamma-Al2O3 and partially melted regions, while the conventional coating mostly consisted of fully melted gamma-Al2O3, together with some TiO2-rich regions and unmelted Al2O3 powders. The wear test results revealed that the wear resistance of the nanostructured coatings was 3 or 4 times better than that of the conventional coating, because the preferential delamination seriously occurred along TiO2-rich regions in the conventional coating. In the nanostructured coatings, TiO2 was homogeneously dispersed inside splats and around, thereby leading to higher splat bonding strength and to better wear resistance over the conventional coating.
URI
http://oasis.postech.ac.kr/handle/2014.oak/23998
ISSN
1073-5623
Article Type
Article
Citation
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, vol. 37A, no. 6, page. 1851 - 1861, 2006-01
Files in This Item:

qr_code

  • mendeley

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Related Researcher

Researcher

 LEE, SUNG HAK
Dept of Materials Science & Enginrg
Read more

Views & Downloads

Browse