Titelaufnahme

Titel
Towards computer-aided design of bio-materials by example of micro-elasticity of porous ceramic baghdadite (Ca3ZrSi2O9) / von Hawraa Kariem
VerfasserKariem, Hawraa
Begutachter / BegutachterinHellmich, Christian ; Pastrama, Maria-Ioana
Erschienen2014
Umfang46 Bl. : graph. Darst.
HochschulschriftWien, Techn. Univ., Dipl.-Arb., 2014
Anmerkung
Zsfassung in dt. Sprache
SpracheEnglisch
DokumenttypDiplomarbeit
Schlagwörter (DE)bio materials
Schlagwörter (EN)bio materials
Schlagwörter (GND)Knochenzement
URNurn:nbn:at:at-ubtuw:1-69925 Persistent Identifier (URN)
Zugriffsbeschränkung
 Das Werk ist frei verfügbar
Dateien
Towards computer-aided design of bio-materials by example of micro-elasticity of porous ceramic baghdadite (Ca3ZrSi2O9) [0.74 mb]
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Zusammenfassung (Deutsch)

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.

Zusammenfassung (Englisch)

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.