Glass-ceramics, elastic properties

The glass-ceramic phase assemblage, ie, the types of crystals and the proportion of crystals to glass, is responsible for many of the physical and chemical properties, such as thermal and electrical characteristics, chemical durabiUty, elastic modulus, and hardness. In many cases these properties are additive for example, a phase assemblage comprising high and low expansion crystals has a bulk thermal expansion proportional to the amounts of each of these crystals. 

Carter, S., Ponton, C.B., Rawlings, R.D., Rogers, PS. (1988), Microstructure, chemistry, elastic properties and internal friction of Silceram glass-ceramics , 7. Mater. Sci., 23, 2622- 2630. 

Elastic properties of rubbers and gels are markedly different from those of metals, ceramics, and glasses. The properties of rubbers may be summarized as follows ... 

Glass-ceramics are glassy in the first production step. An important property is the final (after cer-amization) coefficient of thermal expansion, often in combination with a high elastic modulus and low specific weight. High thermal stability and thermal-shock resistance are a prerequisite for the major applications. This group has the potential for many other applications which require different property combinations [4.3]. 

Table3.l -19 Coefficient of linear thermal expansion a, density, and elastic properties of Zerodur and Ceran glass-ceramics...

Rogier, R. Pemot, F. (1990). Elastic and mechanical properties of glass-ceramic and metal composites for orthopedic applications. In T. Yamamuro, L.L. Hench J. Wilson. 

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