Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
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Effects of Wollastonite Coating on Surface Characteristics of Plasma Electrolytic Oxidized Ti-6Al-4V Alloy

플라즈마 전해 산화처리된 Ti-6Al-4V합금의 표면특성에 미치는 울라스토나이트 코팅효과

  • Jaeeun Go (Dept. of Materials Science and Engineering, Chosun University) ;
  • Jong Kook Lee (Dept. of Materials Science and Engineering, Chosun University) ;
  • Han Cheol Choe (College of Dentistry, Chosun University)
  • 고재은 (조선대학교 신소재공학과) ;
  • 이종국 (조선대학교 신소재공학과) ;
  • 최한철 (조선대학교 치과대학)
  • Received : 2023.08.05
  • Accepted : 2023.08.11
  • Published : 2023.08.30
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Abstract

Ti-6Al-4V alloys are mainly used as dental materials due to their excellent biocompatibility, corrosion resistance, and chemical stability. However, they have a low bioactivity with bioinertness in the body. Therefore, they could not directly bond with human bone. To improve their applications, their bone bonding ability and bone formation capacity should be improved. Thus, the objective of this study was to improve the bioinert surface of titanium alloy substrate to show bioactive characteristics by performing surface modification using wollastonite powder. Commercial bioactive wollastonite powder was successfully deposited onto Ti-6Al-4V alloy using a room temperature spray process. It was found that wollastonite-coated layer showed homogeneous microstructure and uniform thickness. Corrosion resistance of Ti-6Al-4V alloy was also improved by plasma electrolytic oxidation treatment. Its wettability and bioactivity were also greatly increased by wollastonite coating. Results of this study indicate that both plasma electrolytic oxidation treatment and wollastonite coating by room temperature spray process could be used to improve surface bioactivity of Ti-6Al-4V alloy substrate.

Keywords

Acknowledgement

이 연구는 한국연구재단의 기초연구실지원사업(과제번호: 2021R1A4A1030243)과 중견연구지원사업(과제번호:2023R1A2C1005748)으로 수행되었음.

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