Graded porous titanium scaffolds fabricated using powder metallurgy technique

Fan, Xingping; Feng, Bo; Di, Yuli; Wang, J. X.; Li, Xiong; Weng, Jie

doi:10.1007/s11106-012-9443-0

Cited by 8 publications

(11 citation statements)

References 14 publications

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“…Generally, the acid etching method used is low-cost and easy to perform compared to other metallurgical processes [6][7][8][9][10][11][12][13][14]. More importantly, the porosity and pore size of the outer porous layer can be easily controlled by simply adjusting the entangled structure.…”

Section: Discussionmentioning

confidence: 99%

“…But its strength and stiffness are too low to be used as a load-bearing For the purpose of comparison, the mechanical properties of the graded porous Ti-Mg composite, the other competitive metallic biomaterials [1,[6][7][8]10,11,18,19,[36][37][38][39], and the natural bone [1,[32][33][34][35] were plotted together (Fig.6). The strength of the graded porous Ti-Mg composite is comparable to that of other graded porous Ti materials [6,7,11], but superior to that of the porous Ti materials [18,19,36,37] (Fig. 6(a)).…”

Section: Discussionmentioning

confidence: 99%

“…E-mail: ghe@sjtu.edu.cn (G. He) shapes and various structural configurations so as to bring about the expected biomechanical properties. According to the structural distinction, Ti biomaterials could be clarified into three groups: solid Ti [1,2], porous Ti [3][4][5], and functionally gradient Ti biomaterials with a gradient of properties (i.e., gradient microstructure and/or composition) [6][7][8][9][10][11][12][13]. The solid Ti possesses a critical issue related to the mismatch of the elastic modulus between Ti implant and cortical/cancellous bone, which can lead to stress-shielding over the surrounding bone [1,2].…”

Section: Introductionmentioning

confidence: 99%

“…The gradient porous Ti could be prepared by different technical methods including the traditional powder metallurgy technology [6][7][8], direct laser metal sintering [9], electro discharge sintering [10], plasma rotating electrode/gas atomization process [11], multiple coating techniques [12], sequential freeze casting [13], etc. Each method provided different gradient porous configuration and quality.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Fabrication of graded porous titanium–magnesium composite for load-bearing biomedical applications

Jiang

Wang

et al. 2015

Materials & Design

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Fabrication of graded porous titanium–magnesium composite for load-bearing biomedical applications

Jiang

Wang

et al. 2015

Materials & Design

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“…Ahn et al [3] and Xue and Zhao [2] produced highly porous titanium-matrix foams by powder metallurgy and showed that they have good mechanical properties. Fan et al [4] found that the graded porous titanium scaffold could be used for engineering scaffolds in load bearing conditions. Dunand [5] described different ways of processing of titanium foams.…”

Section: Introductionmentioning

confidence: 99%

Effects of SiC Nanoparticles on the Properties of Titanium-Matrix Foams Processed by Powder Metallurgy

Edalati

Sajjadi

Babakhani

2017

Metals

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Metal-matrix foams are used widely for structural applications such as impact energy absorption, vibration resistance and weight reduction. In this study titanium nanocomposite foams with different porosity percentages were produced using TiH 2 , as foaming agent, by powder metallurgy technique. At first, raw materials including titanium powder and different weight percentages of SiC nanoparticles were mixed and then different amounts of TiH 2 were added to the mixture. The mixture was compacted at 200 MPa. The samples were heat treated in two stages, first at 400 • C for 1 h, as a partial sintering, and then at 1050 • C for 2 h, as foaming treatment. Mechanical and structural properties such as compressive strength, energy absorption, porosity percentage and relative density of samples were measured and compared together. Thermo gravimetric analysis (TGA), differential thermal analysis (DTA), scanning electron microscopy (SEM) and X-ray diffraction (XRD) were performed on foaming agent and samples. The results showed uniform distribution of SiC nanoparticles in titanium matrix and also homogenous pore structure. It was concluded that with increasing SiC weight percent, relative density is increased to 0.43 in the sample with 1.5 wt % SiC. Besides, the measured compressive strength of samples was in the range of 14.4-32.3 MPa. Moreover, it was concluded that the energy absorption of samples increases with increasing SiC nano particles up to 33.09 MJ/m 3 .

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Sinter‐Based Additive Manufacturing of Graded Porous Titanium Scaffolds by Multi‐Inks 3D Extrusion

2022

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A 3D printing approach to design and produce cellular scaffolds with a precise tunable pore architecture, in terms of size, fraction, and interconnectivity is reported. Different metallic inks are formulated by mixing hydrogel with Ti–6Al–4V atomized powders of various sizes. After 3D printing by direct‐ink writing (DIW) followed by debinding and sintering, the fraction and size of macropores (, designed by computer‐aided design (CAD)) and micropores (, remaining after sintering), the roughness and the microstructure are determined by high‐resolution X‐ray tomography and electron microscopy, and correlated to the initial powder size. It is shown that playing with initial powder size allows designing different pore architectures, from interconnected micropores to fully dense filaments. These phenomena are combined with a multi‐inks DIW approach to fabricate architectured structures with graded microporosity. This new route is promising for the production of functional materials, such as biomedical scaffolds or implants, with tunable osseointegration, stiffness, and strength. The micropores could also be loaded with active molecules and positioned according to release needs.

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Graded porous titanium scaffolds fabricated using powder metallurgy technique

Cited by 8 publications

References 14 publications

Fabrication of graded porous titanium–magnesium composite for load-bearing biomedical applications

Fabrication of graded porous titanium–magnesium composite for load-bearing biomedical applications

Effects of SiC Nanoparticles on the Properties of Titanium-Matrix Foams Processed by Powder Metallurgy

Sinter‐Based Additive Manufacturing of Graded Porous Titanium Scaffolds by Multi‐Inks 3D Extrusion

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