Details

Autor(en) / Beteiligte

• Gao, Han
• Yu, Mei-jie
• Chen, Xin
• Xiao, Gui-yong
• Chen, Chuan-zhong
• Lu, Yu-peng

Titel

Fabrication of micro/nanoscale stepped surface on Ti6Al4V by sandblasting and ultrasonic-assisted acid-etching

Ist Teil von

• Materials letters, 2023-07, Vol.342, p.134308, Article 134308

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2023

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• •Hierarchical structures with micro cavities and nano steps are obtained on Ti6Al4V.•Step density is increased with etching time and enhanced by ultrasonic treatment.•Step formation is attributed to crystal orientation dependent corrosion.•Ultrasonic and sandblasting treatments accelerate etching and step formation. Micro/nano-structured surface on titanium (Ti)-based implant gains great concern for its improvement on cell response and osteogenic ability. In this paper, a novel hierarchical structure combining microscale cavities and nanoscale steps was fabricated on Ti6Al4V, via sandblasting and ultrasonic-assisted acid-etching in mixed acids of HCl and H2SO4. Stepped structures are about 100–300 nm in width and 100–200 nm in height. The step density is increased with extension of acid-etching period, and significantly increased by ultrasonic treatment. It is supposed that the differences in etching rate of different crystal orientations are responsible for step formation. Moreover, ultrasonic and sandblasting treatments could increase acid-etching rate and promote the emergence of steps. The hierarchical surfaces exhibit similar microscale roughness to micro-rough surfaces without steps, but slightly higher contact angles.