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Improved bonding strength between TiO2 film and Ti substrate by microarc oxidation

Authors
 M. H. Hong  ;  D. H. Lee  ;  K. M. Kim  ;  Y. K. Lee* 
Citation
 SURFACE AND INTERFACE ANALYSIS, Vol.42(6-7) : 492-496, 2010 
Journal Title
 SURFACE AND INTERFACE ANALYSIS 
ISSN
 0142-2421 
Issue Date
2010
Keywords
bonding strength ; microarc oxidation ; titania ; titanium
Abstract
Titanium (Ti) and its alloys have proved to be very suitable materials for load-bearing bioimplant applications. Unfortunately, Ti and its alloys exhibit poor osteoinductive properties like most metals. This drawback was recently addressed by modified titania (TiO2). However, the bonding strength between TiO2 and substrate is not very strong. Therefore, mechanical properties and biochemical stability are very important. Many techniques have been investigated for modifying the TiO2 layer. Microarc oxidation (MAO) represents a relatively new surface modification technique where thick, hard and anticorrosive oxide coatings can be easily and cost-effectively fabricated. In this study, various chemicals were used as the electrolyte for MAO. Hydroxyapatite (HA) suspension was prepared by dispersing HA powder in distilled water and adjusting the pH in the range of 4–11. Bonding strength between TiO2 film and substrate was determined by modified ASTM C-633 and the ability to form apatite was confirmed after MAO, by soaking in simulated body fluid (SBF). The bonding strength decreased when the electrolyte was changed, but increased with increasing voltage. Bioactivity was only present in NaOH-treated specimens
Full Text
http://onlinelibrary.wiley.com/doi/10.1002/sia.3309/abstract
DOI
10.1002/sia.3309
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Dental Biomaterials and Bioengineering (치과생체재료공학교실) > 1. Journal Papers
Yonsei Authors
Kim, Kwang Mahn(김광만) ORCID logo https://orcid.org/0000-0002-5235-0294
Lee, Yong Keun(이용근)
Hong, Min Ho(홍민호)
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/101735
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