Fracture strength and elastic modulus as a function of porosity for hydroxyapatite and other brittle materials, Part II

Journal Article · Sun Jan 01 04:00:00 EST 2012 · Journal of the Mechanical Behavior of Biomedical Materials

DOI:https://doi.org/10.1016/j.jmbbm.2011.12.014· OSTI ID:1048758

Fan, Xiaofeng ^[1]; Case, Eldon D ^[1]; Ren, Fei ^[2]; Shu, Yutian ^[1]; Baumann, Melissa ^[1]

---

1. Michigan State University, East Lansing
2. ORNL

Part I of this paper discussed the Weibull modulus m, versus porosity P behavior of brittle materials, including HA. While the Weibull modulus m deals with the scatter in fracture strength data, this paper (Part II) focuses on two additional key mechanical properties of porous materials, namely the average fracture strength f , and Young s modulus E, for P in the interval from P zero to P PG (the porosity of the unfired compacts). The f versus P data for HA from this study and the literature data for alumina, yttria stabilized zirconia (YSZ) and silicon nitride are describedwell by functions of , where = 1 P/PG = the degree of densification. A similar function of applies to the E versus P behavior of HA from this study and data from the literature for alumina, titanium and YSZ. All of the data analyzed in this study (Part II) are based on partially and fully sintered powder compacts (excluding green powder compacts), thus the f / 0 versus and E /E0 versus relationships may apply only to such specimens.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: EE USDOE - Office of Energy Efficiency and Renewable Energy (EE)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1048758
• Journal Information: Journal of the Mechanical Behavior of Biomedical Materials, Journal Name: Journal of the Mechanical Behavior of Biomedical Materials Vol. 8; ISSN 1751-6161
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
FRACTURE PROPERTIES
MECHANICAL PROPERTIES
POROSITY
POROUS MATERIALS
SILICON NITRIDES
TITANIUM