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The Effect of Vacuum Leak Rate on Sintering of Porous Titanium Scaffold Publisher



Valanezhad A1 ; Savabi O2 ; Nejatidanesh F3 ; Khodaei M4 ; Shirani MJ5 ; Watanabe I1
Authors
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Authors Affiliations
  1. 1. Department of Dental and Biomedical Materials Science, Nagasaki University, Nagasaki, Japan
  2. 2. Dental Research Center, Dental Research Institute, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran
  3. 3. Dental Materials Research Center, Dental Research Institute, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran
  4. 4. Department of Materials Science and Engineering, Golpayegan University of Technology, Golpayegan, Iran
  5. 5. Student Research Committee, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran

Source: e-Journal of Surface Science and Nanotechnology Published:2019


Abstract

Titanium is a highly reactive metal and its high-temperature processing has to be done at a high-vacuum atmosphere. In this research, porous titanium scaffolds were fabricated using the space holder method for dental reconstruction purposes. Accordingly, the samples were sintered in two different vacuum furnaces at the vacuum level of 0.013 Pa, including high-vacuum leak rate (HLR) and low-vacuum leak rate (LLR). The microstructural study using the scanning electron microscope revealed that there was no significant difference in the microstructure of the samples. A compression test on the porous titanium scaffolds indicated that the HLR sample had less strength than the LLR sample. X-ray diffractometry also revealed that, besides the titanium peaks, the HLR sample included titanium oxide phases, unlike the LLR sample. Therefore, both vacuum chamber design and a vacuum leak rate of the furnace are parameters which are effective on the sintering of the porous titanium scaffold and should be considered. (Figure presented.). © 2019 The Japan Society of Vacuum and Surface Science. All rights reserved.
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