Title: Towards computer-aided design of bio-materials by example of micro-elasticity of porous ceramic baghdadite (Ca3ZrSi2O9)
Language: English
Authors: Kariem, Hawraa 
Keywords: bio materials
bio materials
Advisor: Hellmich, Christian 
Assisting Advisor: Pastrama, Maria-Ioana 
Issue Date: 2014
Number of Pages: 46
Qualification level: Diploma
Abstract: 
Microstructure-elasticity relations for bone tissue engineering scaolds are key to rationally based biomaterial design. As a contribution, we here report comprehensive length measuring, weighing, and ultrasonic tests at 0.1 MHz frequency, on porous baghdadite scaolds. The resulting porosity-stiness relations further con rm a formerly detected, micromechanically explained, general relationship for a great variety of different polycrystals (Fritsch et al., 2013), which also allows for estimating the zero-porosity case, i.e. the Young's modulus and Poisson's ratio of pure (dense) baghdadite. These estimates were impressively con rmed by a physically and statistically independent nanoindentation campaign comprising some 1750 indents. Consequently, we can present a remarkably complete picture of porous baghdadite elasticity across a wide range of porosities, and, thanks to the micromechanical understanding, reaching out beyond classical elasticity, towards poroelastic properties, quantifying the eect of pore pressure on the material system behaviour.

Microstructure-elasticity relations for bone tissue engineering scaolds are key to rationally based biomaterial design. As a contribution, we here report comprehensive length measuring, weighing, and ultrasonic tests at 0.1 MHz frequency, on porous baghdadite scaolds. The resulting porosity-stiness relations further con rm a formerly detected, micromechanically explained, general relationship for a great variety of different polycrystals (Fritsch et al., 2013), which also allows for estimating the zero-porosity case, i.e. the Young's modulus and Poisson's ratio of pure (dense) baghdadite. These estimates were impressively con rmed by a physically and statistically independent nanoindentation campaign comprising some 1750 indents. Consequently, we can present a remarkably complete picture of porous baghdadite elasticity across a wide range of porosities, and, thanks to the micromechanical understanding, reaching out beyond classical elasticity, towards poroelastic properties, quantifying the eect of pore pressure on the material system behaviour.
URI: https://resolver.obvsg.at/urn:nbn:at:at-ubtuw:1-69925
http://hdl.handle.net/20.500.12708/2578
Library ID: AC11729160
Organisation: E202 - Institut für Mechanik der Werkstoffe und Strukturen 
Publication Type: Thesis
Hochschulschrift
Appears in Collections:Thesis

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