Sintered Porous Titanium and Titanium Alloys as Advanced Biomaterials

2003 ◽  
Vol 426-432 ◽  
pp. 3079-3084 ◽  
Author(s):  
Kenzo Asaoka ◽  
Masayuki Kon
Keyword(s):  
Titanium Alloys ◽  
Porous Titanium ◽  
Advanced Biomaterials

scholarly journals Titania sol-gel coatings with silver on non-porous titanium and titanium alloys

2016 ◽  
Vol 123 ◽  
pp. 012002 ◽  
Author(s):  
D Horkavcova ◽  
M Cerny ◽  
L Sanda ◽  
P Novak ◽  
E Jablonska ◽  
...  
Keyword(s):  
Titanium Alloys ◽  
Sol Gel ◽  
Porous Titanium ◽  
Titania Sol

The Processing and Fatigue Characterization of TiNi and Ti-6Al-4V Porous Materials

2011 ◽  
Vol 493-494 ◽  
pp. 930-935 ◽  
Author(s):  
Emin Erkan Aşik ◽  
Gül Ipek Nakaş ◽  
Şakir Bor
Keyword(s):  
Titanium Alloys ◽  
Endurance Limit ◽  
Fatigue Behavior ◽  
Porous Titanium ◽  
Fatigue Tests ◽  
Fatigue Properties ◽  
Compression Tests ◽  
Limit Values ◽  
Porous Ti ◽  
Structural Applications

Porous titanium alloys have been extensively studied in biomedical applications due to their elastic moduli similar to that of bone compared to other implant materials. Accordingly, TiNi and Ti-6Al-4V foams have been widely characterized in terms of their various mechanical properties; however, their fatigue properties have not been well studied, even though, it has a vital importance in structural applications such as medical implants. In this study, porous titanium alloys were processed via sintering at 1200 °C for 2 hours employing Mg space holder technique. TiNi and Ti-6Al-4V alloys with a porosity of 49 and 51 vol.%, respectively, were mechanically characterized by monotonic and cyclic compression tests. The compressive strength was determined to be 148 MPa for TiNi foams whereas 172 MPa for Ti-6Al-4V foams with homogenously distributed pores having diameters in the range of 250-600 µm. Endurance limit values were determined relative to the yield strength of each porous alloy in order to enable the comparison of fatigue behavior. The fatigue tests applied with a frequency of 5 Hz and a constant stress ratio (σmin/σmax) of 0.1 have revealed that porous TiNi alloys have an endurance limit of approximately 0.6 σy whereas porous Ti-6Al-4V alloys have an endurance limit of approximately 0.75 σy. The differences and similarities in the microstructure and their effect on mechanical behavior of the two alloys were also studied by employing scanning electron microscope (SEM).

The Porous TiNb24Zr4 Alloys with Controllable Porosity Fabricated by Conventional Sintering

2011 ◽  
Vol 335-336 ◽  
pp. 797-804
Author(s):  
Yu Xuan Li ◽  
Zhen Duo Cui ◽  
Xian Jin Yang ◽  
Sheng Li Zhu
Keyword(s):  
Titanium Alloys ◽  
Porous Titanium ◽  
Ammonium Bicarbonate ◽  
Pore Characteristics ◽  
Β Phase ◽  
Α Phase ◽  
Microscopy Image ◽  
Optical Microscopy Image ◽  
Conventional Sintering ◽  
Sintering Method

In the present study, porous titanium alloys were fabricated successfully by mixing titanium, niobium, and zirconium powder with pore-forming agent of ammonium bicarbonate via conventional sintering method. The pore characteristics, such as pore morphology and distribution, mean pore size and porosity of prepared porous TiNb24Zr4alloy were investigated by optical microscopy, image processing and density determination. It was found that the pore characteristics mainly depended on the shape and size of used ammonium bicarbonate particles in present study. The porosity of the alloys could be tailored by controlling the amount of ammonium bicarbonate addition. The porous TiNb24Zr4alloys were near β type titanium alloys, which consisted mainly of β phase and a little of α phase. The amount of α phase increased in the porous alloys due to segregation caused by the addition of pore-forming agent.

Biomimetic Creation of Surfaces on Porous Titanium for Biomedical Applications

2014 ◽  
Vol 896 ◽  
pp. 259-262 ◽  
Author(s):  
Kun Mediaswanti ◽  
Cui E Wen ◽  
Elena P. Ivanova ◽  
Francois Malherbe ◽  
Christopher C. Berndt ◽  
...  
Keyword(s):  
Elastic Modulus ◽  
Titanium Alloys ◽  
Biomedical Applications ◽  
Healing Process ◽  
Porous Titanium ◽  
Surrounding Tissue ◽  
Calcium Phosphate Coating ◽  
Natural Bone ◽  
Silica Addition ◽  
Dense Titanium

Titanium and titanium alloys have been extensively studied for many applications in the area of bone tissue engineering. However, dense titanium is prone to lead into aseptic loosening due to their high elastic modulus compared to natural bone. One way to lower the elastic modulus is to produce a porous structure of the metallic alloy by adjusting its porosity. Another concern is the bioinertness of titanium that have no direct chemical bonding with surrounding tissue. One approach to improve the healing process is the application of a calcium phosphate coating onto the surface of biomedical devices and implants. Biomimetic creation of surface using alkali heat treatment with silica addition was employed in this study. The porosity of the samples ranges from 60% to 70%. It was demonstrated that the biomimetic methods are suitable for inducing apatite on the titanium alloys surface.

The Fabrication and the Properties of Gradient Porous Titanium by Centrifugal Deposition and Sintering

2014 ◽  
Vol 1042 ◽  
pp. 38-43 ◽  
Author(s):  
Guo Jian Cao ◽  
Wan Jiao Xu ◽  
Yi Cheng Feng ◽  
Wan Yong Tang
Keyword(s):  
Mechanical Properties ◽  
Elastic Modulus ◽  
Pore Structure ◽  
Titanium Alloys ◽  
Porous Titanium ◽  
Optical Microscope ◽  
Vacuum Sintering ◽  
Porous Ti ◽  
Bone Replacement ◽  
Mechanical Compatibility

Gradient-porous Titanium alloys can be applied to manufacturing implants for bone replacement, due to their good biological and mechanical compatibility. In this work, the feasibility of fabricating gradient-porous Titanium by centrifugal deposition and vacuum sintering was investigated. The apparent porosity of the gradient-porous Ti examined by Archimedes method is 56%. And the open pores occupy 89%. The pore structure was observed by an optical microscope. And its porosities at different radius were calculated by image software based on optical microscopic images. In addition, a nanoindentation was employed to characterize the mechanical properties at different radius. The results showed that the porosity of the sample increased with increasing of radius. Besides, both the elastic modulus and hardness changed alone radius with a same trend.

Preparation and properties of biomedical porous titanium alloys by gelcasting

2011 ◽  
Vol 6 (4) ◽  
pp. 045010 ◽  
Author(s):  
Donghua Yang ◽  
Huiping Shao ◽  
Zhimeng Guo ◽  
Tao Lin ◽  
Lianpeng Fan
Keyword(s):  
Titanium Alloys ◽  
Porous Titanium

Preparation and Characterisation of New Titanium Based Alloys for Orthopaedic and Dental Applications

2006 ◽  
Vol 15-17 ◽  
pp. 71-76 ◽  
Author(s):  
A. Nouri ◽  
X.B. Chen ◽  
Peter D. Hodgson ◽  
Cui E Wen
Keyword(s):  
Elastic Modulus ◽  
Titanium Alloys ◽  
High Strength ◽  
Porous Titanium ◽  
Vacuum Furnace ◽  
Powder Metallurgy Method ◽  
Porous Metals ◽  
X Ray Diffraction ◽  
Low Elastic Modulus ◽  
Dental Applications

Various types of titanium alloys with high strength and low elastic modulus and, at the same time, vanadium and aluminium free have been developed as surgical biomaterials in recent years. Moreover, porous metals are promising hard tissue implants in orthopaedic and dentistry, where they mimic the porous structure and the low elastic modulus of natural bone. In the present study, new biocompatible Ti-based alloy foams with approximate relative densities of 0.4, in which Sn and Nb were added as alloying metals, were synthesised through powder metallurgy method. The new alloys were prepared by mechanical alloying and subsequently sintered at high temperature using a vacuum furnace. The characteristics and the processability of the ball milled powders and the new porous titanium-based alloys were characterised by X-ray diffraction, optical microscopy and scanning electron microscopy .The mechanical properties of the new titanium alloys were examined by Vickers microhardness measurements and compression testing.

Review on Corrosion Characteristics of Porous Titanium Alloys Fabricated by Additive Manufacturing

2021 ◽  
Vol 26 (3) ◽  
pp. 416-430
Author(s):  
Xin Gai ◽  
Yun Bai ◽  
Shujun Li ◽  
Liao Wang ◽  
Songtao Ai ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Titanium Alloys ◽  
Porous Titanium
Sign in / Sign up

Export Citation Format

Share Document