Synthesis of nano-structured sphene and mechanical properties optimization of its scaffold via response surface methodology
الموضوعات :Amirmostafa Amirjani 1 , Masoud Hafezi 2 , Ali Zamanian 3 , Mana Yasaee 4 , Noor Azuan Abu Osman 5
1 - Department of Mining and Metallurgical Engineering, Amirkabir University of Technology, Tehran, Iran
2 - Nanotechnology and Advanced Materials Division, Materials and Energy Research Center, Iran
3 - Nanotechnology and Advanced Materials Department, Materials and Energy Research Center, Alborz, Iran.
4 - Department of Life Science Engineering, Faculty of New Sciences and Technologies, University of Tehran, Tehran, Iran.
5 - Department of Biomedical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia.
الکلمات المفتاحية: Response Surface Methodology, mechanical properties, Bioceramics, Mechano-chemical synthesis,
ملخص المقالة :
Nano-structured sphene (CaTiSiO5) powder was synthesized via mechanical activation and heat treatment method. The synthesized powder was characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and simultaneous thermal analysis (STA). The sphene scaffolds were then fabricated via porogen method (using citric acid). Response surface methodology was successfully used to determine the effects of d (particle size) and %V porogen (volume percent of porogen) on the mechanical behavior of the prepared sphene scaffolds. Moreover, a suitable mathematical model for describing the relationship between the factors (d and %V porogen) and the response (compressive strength) was statistically developed. The use of porogen in the synthesis procedure can change the porosity value of the final scaffold; thus, the compressive strength of the sphene scaffolds varied widely. Statistical analysis results predicted that the maximum value of the compressive strength can be obtained at the following conditions: %V = 25% and d = 250 µm. At these conditions, the prepared scaffolds possess a compressive strength value as high as 7 MPa.
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