Freeze casting of porous hydroxyapatite scaffolds. II. Sintering, microstructure, and mechanical behavior

This work describes two novel techniques for the fabrication of porous hydroxyapatite scaffolds for calcified tissue engineering; robocasting and freeze casting. These techniques allow the fabrication of materials with complex porosity. Both are based on the preparation of concentrated ceramic suspensions with suitable properties for the process. In robocasting, the computer-guided deposition of the suspensions is used to build porous materials with designed three dimensional (3-D) geometries and microstructures. Freeze casting uses ice crystals as a template to form porous lamellar ceramic materials. Preliminary results on the compressive strengths of the materials are also reported.

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Mechanical behavior and microstructure of compressed Ti foams synthesized via freeze casting

Journal of the Mechanical Behavior of Biomedical Materials ◽

10.1016/j.jmbbm.2016.07.012 ◽

2016 ◽

Vol 63 ◽

pp. 407-416 ◽

Cited By ~ 18

Author(s):

Péter Jenei ◽

Hyelim Choi ◽

Adrián Tóth ◽

Heeman Choe ◽

Jenő Gubicza

Keyword(s):

Mechanical Behavior ◽

Freeze Casting

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Effect of sintering temperature and cooling rate on the morphology, mechanical behavior and apatite-forming ability of a novel nanostructured magnesium calcium silicate scaffold prepared by a freeze casting method

Journal of Materials Science ◽

10.1007/s10853-013-7813-8 ◽

2013 ◽

Vol 49 (3) ◽

pp. 1297-1305 ◽

Cited By ~ 13

Author(s):

Masoud Hafezi ◽

Nader Nezafati ◽

Ali Nadernezhad ◽

Mana Yasaei ◽

Ali Zamanian ◽

...

Keyword(s):

Mechanical Behavior ◽

Cooling Rate ◽

Calcium Silicate ◽

Sintering Temperature ◽

Freeze Casting ◽

Casting Method

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Application of TEM to Deformation, Wear, and Fracture of Ceramics

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100052377 ◽

1974 ◽

Vol 32 ◽

pp. 472-473

Author(s):

B. J. Hockey

Keyword(s):

Wear Resistance ◽

High Temperature ◽

Mechanical Behavior ◽

Brittle Materials ◽

High Temperature Strength ◽

Wide Range ◽

Corrosive Environments ◽

Further Development

Ceramics, such as Al2O3 and SiC have numerous current and potential uses in applications where high temperature strength, hardness, and wear resistance are required often in corrosive environments. These materials are, however, highly anisotropic and brittle, so that their mechanical behavior is often unpredictable. The further development of these materials will require a better understanding of the basic mechanisms controlling deformation, wear, and fracture.The purpose of this talk is to describe applications of TEM to the study of the deformation, wear, and fracture of Al2O3. Similar studies are currently being conducted on SiC and the techniques involved should be applicable to a wide range of hard, brittle materials.

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