Porous Ceramics Mechanical Properties

Mechanical and thermal properties of porous yttria stabilized zirconia.

Porous ceramics mechanical properties.

Porous ceramics have grown in importance in the industry recently because of their many applications like filters absorbers dust collectors thermal insulation hot gas collectors dielectric resonators bioreactors bone replacement and automobile engine components 1 2 3 4 generally porous ceramics have good properties such as mechanical strength abrasion resistance chemical and. Regarding pore stress interactions there is strong evidence in the literature 40 41 42 concerning the mechanical behavior of human bones also a quasi brittle material to support the hypothesis that microstructural changes in material may be essential in controlling its. Porous materials are commonly found in nature and as industrial materials such as wood carbon foams ceramics and bricks. Despite the large range in the reported mechanical properties of bone these act as a guide to the required mechanical properties of a scaffold.

Therefore mechanical behavior of highly porous ceramics is different from that of dense ceramics. Carefully tailored micro structure size morphology and orientation of grains and pores etc of porous ceramics has led to unique mechanical properties which cannot be attained even in the dense materials. Ceramics generally can withstand very high temperatures ranging from 1 000 c to 1 600 c 1 800 f to 3 000 f. The aim of this chapter is to review the mechanical properties of macro porous ceramics.

Then they take into account the mechanical properties of porous ceramics depend on pores stress interactions. In this work we evaluate different mechanical testing methods such as static compression brazilian disc test and 3 point bending on their suitability for comparison of highly porous ceramic materials. Glass is often not considered a ceramic because of its amorphous noncrystalline character. There have been a number of different microstructures or architectures of highly porous ceramic and glass scaffolds that have been used for tissue engineering applications.

The following issues are of particular interest to this paper. Various types of the sacrificial fugitives have been examined for obtaining well tuned shape and size of pores. The mechanical properties of porous ceramics are greatly influenced by their microstructure. However glassmaking involves several steps of the ceramic process and its mechanical properties are similar to ceramic materials.