Elastic moduli data for polycrystalline oxide ceramics added to webbook.

A major compilation of elastic moduli data (Young's modulus, shear modulus, bulk modulus, and Poisson's ratio) for oxide ceramics has been completed and added to the online NIST Ceramics WebBook. The variation of material properties with respect to internal microstruc-tural characteristics and environmental parameters is a critical consideration in the development and application of all advanced materials. The variation of elasticity is especially important to engineering applications in which the material components experience mechanical stresses. As part of the effort to provide evaluated data for advanced ceramics, NIST researchers have conducted a detailed review of the variation of the elastic moduli of polycrystalline oxide ceramics with respect to porosity and temperature. A compilation of data for 50 oxide ceramics was constructed, and the data were analyzed in the context of a suitable model expressing the simultaneous dependence on porosity and temperature analytically. The nearly 4000 property values were extracted from publicly accessible technical literature. Data originally presented as graphs were digitized so that the entire compilation could be given in the form of tabulated numeric values. The entire collection is available in hard copy (NISTIR 6853) and online at www.ceramics.nist.gov.

CONTACT: Ronald Munro, [phone]; [e-mail].