Effects of Sintering Temperature on the Porosity and Mechanical Behavior of Porous Titanium Scaffolds Prepared by Freeze-Casting

Chang, Joe-Ming; Liu, Guanlin; Tung, Hsiao-Ming

doi:10.1007/s11665-019-04291-w

Cited by 8 publications

(4 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, Table 3 shows the comparison between the compressive strength of porous titanium prepared by the ice‐templating method. The porous titanium prepared in this article has higher compressive strength than most previous studies, [ 12,16,27 ] and the size of porous titanium is also larger, which is beneficial to osseointegration.…”

Section: Resultsmentioning

confidence: 82%

“…For instance, as the sintering temperature decreases in a certain range, the pore size increases due to the decreases in sample shrinkage. [27] Furthermore, as the lamellar pore size increases, the compressive strength decreases sharply, [12] and this puts the implant at risk of failure. Considering that the pores are replicas of ice crystals, [28,29] the morphology of ice crystals directly affects the pore structure, and mechanical properties of the scaffold.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Customizing the Pore Structure and Properties of Freeze‐Cast Porous Titanium by Zirconium Acetate Additive

Chen

Liu

et al. 2020

Adv Eng Mater

View full text Add to dashboard Cite

Porous titanium scaffolds with high porosity and connected macropores are fabricated by adding zirconium acetate to control the ice crystal growth during freeze casting. The influences of zirconium acetate additives on the phase composition, pore structure, and mechanical properties of porous titanium are studied. As modified by zirconium acetate, the X‐ray diffraction peaks of titanium moves to a smaller angle, and the zirconium is evenly distributed on the titanium matrix. With the increase in the concentration of zirconium from 0 to 60 g L−1, the pore morphology of porous titanium changes from typical lamellar to the honeycomb, the pore size distribution becomes wider. The average pore size and porosity increases from 44 ± 11 to 126 ± 35 μm and from 46.4 ± 1.3 to 59.1 ± 1.3%, respectively. As the concentration of zirconium acetate is 40 g L−1, the porosity and the pore size of the porous titanium scaffolds are comparable with those modified by 10 g L−1 zirconium acetate, but the compressive strength is 2.3 times higher. Zirconium acetate as an additive has an excellent performance in optimizing the pore structure and mechanical properties of water‐based freeze‐cast porous titanium.

show abstract

Section: Resultsmentioning

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Customizing the Pore Structure and Properties of Freeze‐Cast Porous Titanium by Zirconium Acetate Additive

Chen

Liu

et al. 2020

Adv Eng Mater

View full text Add to dashboard Cite

show abstract

“…The size of pores ranged from 71% to 51%, pore sizes were 426 to 311 µm, and the yield compressive strength and elastic modulus of porous Ti6Al4V scaffolds increased from 76 to 223 MPa and from 3.8 to 17.8 GPa, respectively. In [106], for the porous titanium scaffolds prepared by freeze-casting, the sintering temperature significantly influenced the porosity and the mechanical properties of the titanium scaffolds. The porosity decreased from 6% to 20% as the sintering temperatures increased from 800 to 1100 • C. The scaffolds had pore sizes ranged from 2 to 20 µm.…”

Section: Freeze Castingmentioning

confidence: 99%

Structural and Material Determinants Influencing the Behavior of Porous Ti and Its Alloys Made by Additive Manufacturing Techniques for Biomedical Applications

Dziaduszewska

Zieliński

2021

Materials

View full text Add to dashboard Cite

One of the biggest challenges in tissue engineering is the manufacturing of porous structures that are customized in size and shape and that mimic natural bone structure. Additive manufacturing is known as a sufficient method to produce 3D porous structures used as bone substitutes in large segmental bone defects. The literature indicates that the mechanical and biological properties of scaffolds highly depend on geometrical features of structure (pore size, pore shape, porosity), surface morphology, and chemistry. The objective of this review is to present the latest advances and trends in the development of titanium scaffolds concerning the relationships between applied materials, manufacturing methods, and interior architecture determined by porosity, pore shape, and size, and the mechanical, biological, chemical, and physical properties. Such a review is assumed to show the real achievements and, on the other side, shortages in so far research.

show abstract

“…[4,5] Furthermore, the pore size, orientation and distribution of porous ceramics can be influenced by the applied processing strategies, such as replica, [6,7] sacrificial template, [8,9] freeze casting, and direct foaming. [10,11] Freeze-casting method is particularly attractive due to the low cost, adjustable pore structure, and environmental friendliness. [12] As a key factor in porous ceramics prepared by freeze casting, the freezing temperature plays an important role in nucleation and growth of solidified crystals.…”

Section: Introductionmentioning

confidence: 99%

Reconstructed Hierarchical Pore Structure of Porous SiC Ceramics Using Micro‐X‐Ray Computed Tomography

et al. 2023

View full text Add to dashboard Cite

Porous ceramics prepared by freeze casting are strongly appealing for filtration, separation, heat insulation, energy storage, and bioengineering. Herein, a unidirectionally freeze‐casting process is effectively adopted to fabricate porous silicon carbide (SiC) ceramics. The freezing rates of 0.29, 1.59, and 22.80 °C min−1 are presented at the bottom, which are simulated by finite‐element analysis. The pore structure characterize is systematically investigated through the 3D‐reconstructed micro‐X‐Ray computed tomography. Porous SiC ceramics with reasonable densification present the layer‐stacked texture and the hierarchical interconnected porous structure. The pore sizes are in the range of 30–40 μm. With the decreasing of freezing temperatures, the pore sizes reduce, while the number of channels increases. After sublimation of the fine ice crystals, there are a large number of channels (5–10 μm). The open porosities decrease from 82.3% to 78.2%, and a maximum compressive strength of 1.97 MPa is obtained. The pore size distribution is bimodal at the top and bottom of porous ceramics. The surface of porous SiC ceramics with obviously lamellar structure is connected.

show abstract

Effects of Sintering Temperature on the Porosity and Mechanical Behavior of Porous Titanium Scaffolds Prepared by Freeze-Casting

Cited by 8 publications

References 21 publications

Customizing the Pore Structure and Properties of Freeze‐Cast Porous Titanium by Zirconium Acetate Additive

Customizing the Pore Structure and Properties of Freeze‐Cast Porous Titanium by Zirconium Acetate Additive

Structural and Material Determinants Influencing the Behavior of Porous Ti and Its Alloys Made by Additive Manufacturing Techniques for Biomedical Applications

Reconstructed Hierarchical Pore Structure of Porous SiC Ceramics Using Micro‐X‐Ray Computed Tomography

Contact Info

Product

Resources

About