Fabrication of micro-scale porous surfaces for Mg-based implants

Aydin Tahmasebifar, Said Murat Kayhan, Zafer Evis, Yusuf Usta, Muammer Koç

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this study, Mg-based biomedical implant plates with controlled porosity and micro-textured surface were designed and manufactured. AZ91 Mg powders of different size distribution were compacted under compaction pressures of 150 and 200 MPa and compaction temperatures of 100 and 150°C. Compacted green plates were then sintered at 380 and 420°C for 40, 60, 120 and 150 minutes. Different aging schemes were also tested, such as aging temperatures of 100 and 200°C and aging time of 60 and 120 minutes. The main interest was to determine an optimum pressure, temperature and time to produce Mg implant plates with necessary levels of porosity and strength. The feasibility study results showed that compaction load has a significant effect on the achievable porosity. Porosity of plates decreases with increasing the compaction pressure. In compaction stage, suggested temperature must be higher than 100°C to ensure strong bonding among Mg powders. In addition, the inert environment is necessary to prevent oxidation during heat treatment. Finally, there is no significant difference between micro-hardness values after sintering in temperatures below eutectic temperature.

Original languageEnglish
Title of host publicationMaterials Science and Technology Conference and Exhibition 2014, MS and T 2014
PublisherAssociation for Iron and Steel Technology, AISTECH
Pages87-105
Number of pages19
Volume1
ISBN (Electronic)9781634397230
Publication statusPublished - 2014
Externally publishedYes
EventMaterials Science and Technology Conference and Exhibition 2014, MS and T 2014 - Pittsburgh, United States
Duration: 12 Oct 201416 Oct 2014

Other

OtherMaterials Science and Technology Conference and Exhibition 2014, MS and T 2014
CountryUnited States
CityPittsburgh
Period12/10/1416/10/14

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Keywords

  • Biomedical
  • Implant
  • Magnesium powder
  • Micro-manufacturing
  • Porous surface

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Materials Science(all)

Cite this

Tahmasebifar, A., Kayhan, S. M., Evis, Z., Usta, Y., & Koç, M. (2014). Fabrication of micro-scale porous surfaces for Mg-based implants. In Materials Science and Technology Conference and Exhibition 2014, MS and T 2014 (Vol. 1, pp. 87-105). Association for Iron and Steel Technology, AISTECH.