Fabrication of Continuously Porous t-ZrO2 Bodies Using Carbon Powder and Evaluate Their Biocompatibility

Gain, Asit Kumar; Song, Ho Yeon; Lee, Byong Taek

doi:10.4028/www.scientific.net/MSF.534-536.277

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Home Materials Science Forum Progress in Powder MetallurgyFabrication of Continuously Porous t-ZrO2 Bodies...

Fabrication of Continuously Porous t-ZrO₂ Bodies Using Carbon Powder and Evaluate Their Biocompatibility

Abstract:

The continuously porous t-ZrO2 bodies were fabricated by the extrusion process. The average pore size of the 2nd passed samples was about 260μm in diameter. The maximum bending strength value was about 177MPa. For the evaluation of their biocompatibility, human osteoblast like MG-63 cells and osteoclast like Raw 264.7 cells were cultured on the top surface of the porous t-ZrO2 bodies. The osteoblast cells were grown with spindle shape, condensed circular growth and three-dimensional network type. In contrast, the osteoclast cells appeared with pebble stone structure.

Info:

Periodical:

Materials Science Forum (Volumes 534-536)

Main Theme:

Progress in Powder Metallurgy

Edited by:

Duk Yong Yoon, Suk-Joong L. Kang, Kwang Yong Eun and Yong-Seog Kim

Pages:

277-280

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.534-536.277

Citation:

A. K. Gain et al., "Fabrication of Continuously Porous t-ZrO₂ Bodies Using Carbon Powder and Evaluate Their Biocompatibility", Materials Science Forum, Vols. 534-536, pp. 277-280, 2007

Online since:

January 2007

Authors:

Asit Kumar Gain, Ho Yeon Song, Byong Taek Lee

Keywords:

Extrusion Process, In Vitro Study, Porous Ceramics

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References

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Paper TitlePages

Mechanical Properties and Biocompatibility of Porous Titanium Prepared by Powder Sintering

Authors: Ik Hyun Oh, Hyeon Taek Son, Chang Seog Kang, Jae Seol Lee, Jae Ik Cho, Jung Chan Bae, Byong Taek Lee, Ho Yeon Song

635

Sintered Titanium-Hydroxyapatite Composites as Artificial Bones

Authors: Pongporn Moonchaleanporn, Nuchthana Poolthong, Ruangdaj Tongsri

Abstract: The design of engineered bone substitutes takes biocompatibility and mechanical compatibility into account as prerequisite requirements. Titanium (Ti) and hydroxyapatite (HA) with chemical formula of Ca₁₀(PO₄)₆(OH)₂, show good biocompatibility and are known as biomaterials. To combine metal powder (Ti) and ceramic powder (HA) as a composite material with mechanical properties comparable to those of natural bones needs strategy. In this work, powder metallurgy process was employed to produce Ti-HA composites, with nominal HA powder contents in the range of 0-100 vol.%. Mixtures of Ti and HA powders were pressed in a rigid die. Sintering was performed in vacuum atmosphere. The as-sintered specimens were tested on biocompatibility in a human-osteoblast cells. It was found that processing and materials parameters, including compaction pressure, control the composite microstructures and mechanical properties. Laboratory bone tissue culturing showed that a bone tissue could grow on the artificial bones (sintered Ti-HA composites).

Effect of Corn Starch and Potato Starch as the Pore Forming Agent to the Structure of Porous Cordierite

Authors: Hasmaliza Mohamad, Yu Min Lim

Abstract: Porous cordierite is an advanced ceramic which is popular for its interesting properties such as excellent thermal stability, high refractoriness and low dielectric constant. In this study, samples have been prepared by the mixture of aluminium nitrate nonahydrate, magnesium nitrate hexahydrate, tetraethylorthosilicate (TEOS), ethanol and nitric acid through sol-gel route. Corn and potato starch were used as pore forming agent. The amount of pore forming agent added was varied according to their weight percent (5wt%, 10wt%, 15wt% and 20wt%). The solution was then dried in oven at 90°C before sintered at 1350°C. Particle size analyzer was used to characterize the properties of pore forming agents. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis were done on the produced samples. XRD results proved that all the samples produced were pure α-cordierite without the presence of other impurity or pore forming agent. From SEM results, samples using potato starch as the pore forming agent have pore size larger than corn starch due to the larger particle size of potato starch. Majority of the samples show interconnectivity among pores. The pore shape produced by potato starch is in prolate shape whereas for corn starch is in polyhedral shape.

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