Effect of TiO 2 nanotubes developed on pure titanium substrates on the mechanical performance of titanium-titanium single-lap adhesive joints

2016 ◽  
Vol 28 (2) ◽  
pp. 130-137 ◽  
Author(s):  
G.C. Papanicolaou ◽  
D.V. Portan ◽  
G.N. Petropoulos ◽  
L.C. Kontaxis
Keyword(s):  
Mechanical Performance ◽  
Pure Titanium ◽  
Adhesive Joints ◽  
Titanium Substrates

scholarly journals Adhesion Strength of BNT Films Hydrothermally Deposited on Titanium Substrates

2010 ◽  
Vol 123-125 ◽  
pp. 399-402
Author(s):  
Fang Chao Xu ◽  
Kazuhiro Kusukawa
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Adhesion Strength ◽  
Pure Titanium ◽  
Tensile Tests ◽  
Film Deposition ◽  
Lead Free ◽  
Element Analysis ◽  
Substrate Strain ◽  
Titanium Substrates

Lead-free piezoelectric (Bi1/2Na1/2)TiO3 (BNT) films were deposited on 1 mm thick pure titanium(Ti) substrates by a hydrothermal method. Tensile tests were performed to quantitatively assess the adhesion strength between BNT films and Ti substrates. Ti substrates were pretreated by chemical polish and mechanical polish respectively prior to BNT film deposition. In the tensile test, the behavior of BNT film exfoliation was investigated by the replica method. The critical Ti substrate strain inducing BNT film exfoliation was determined by the aid of finite element analysis (FEM). In this study, the results revealed that BNT film exfoliations were caused by the strain of Ti substrate, and the mechanical polish pretreatment improved the adhesion of BNT film to Ti substrate.

scholarly journals Characteristics of BNT Films Synthesized by a Hydrothermal Method

2008 ◽  
Vol 47-50 ◽  
pp. 73-76 ◽  
Author(s):  
Fang Chao Xu ◽  
Kazuhiro Kusukawa
Keyword(s):  
Hydrothermal Method ◽  
Piezoelectric Effect ◽  
Pure Titanium ◽  
Lead Free ◽  
Ion Concentrations ◽  
Three Samples ◽  
Unimorph Cantilever ◽  
Xrd Patterns ◽  
The Relationship ◽  
Titanium Substrates

Thin films of lead-free piezoelectric ceramics (Bi1/2Na1/2)TiO3 (abbreviated as BNT) were prepared on pure titanium substrates by a hydrothermal method. Several properties of BNT films synthesized in various Bi3+ and Ti4+ concentrations of starting materials were investigated using SEM, EDX, XRD and other instruments. Moreover, the effects of ion concentrations of starting materials on permittivity and piezoelectric effect of BNT films were discussed. The Bi2O3 crystals were more deposited on the surface of films with the increase of the concentration of Bi3+. The relationship between the deflection and applied electric field was measured on unimorph cantilever type actuators made from three samples which had different XRD patterns. The results showed that the piezoelectric effect of BNT films was dependent on the crystallization level of BNT.

scholarly journals Coating Characteristic of Hydroxyapatite on Titanium Substrates via Hydrothermal Treatment

Coatings ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1226
Author(s):  
Pham Trung Kien ◽  
Tran Ngo Quan ◽  
Le Huynh Tuyet Anh
Keyword(s):  
Hydrothermal Treatment ◽  
Treatment Time ◽  
Pure Titanium ◽  
Titanium Substrate ◽  
Optical Microscope ◽  
Initial Fixation ◽  
Phosphate Solutions ◽  
Titanium Substrates ◽  
Hydrothermal Treatment Time ◽  
Hydrothermal Methods

Medical pure titanium (Ti) shows excellent chemical stability and mechanical properties in clinical uses, but its initial fixation with host bone, when implanted, is usually delayed owing to the bioinert Ti surface. In this study, we fabricate the hydroxyapatite (HA)-coated titanium by three steps reactions: (1) to form an activated O2− layer by immersing Ti substrate into an alkaline solution such as NaOH; (2) the O2− bonds with Ca2+ to form Ca–O–Ti bonding, in which O plays the part of bridge materials between Ca and Ti substrate and (3) the conversion of Ca–O–Ti samples to HA-coated Ti samples by immersion into Na2HPO4 2 M at 180 °C for 48 h using hydrothermal methods. The effect of different phosphate solutions (NaH2PO4 2 M and Na2HPO4 2 M solution) and hydrothermal treatment time (24 and 48 h) on the characteristic of hydroxyapatite coating titanium substrate is also investigated using the optical microscope, thin film XRD and SEM/EDX. The HA-coated Ti samples fabricated by immersion into Na2HPO4 2 M at 180 °C for 48 h show fiber HA covering Titan substrate with a diameter varying from 0.1 to 0.3 µm. These HA-coated Ti samples can be regarded as promising multifunctional biomaterials.

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