Characteristics of crack growth in sintered materials
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In sintered materials crack growth occurs as a rule through a mechanism of pore coalescence accompanying the rupture of interparticle (interpore) bridges, which in turn can rupture both through microvoid coalescence and transor intercrystallite cleavage. The rupture of a sintered material with a crack is linked not only with the attainment of peak stresses at the crack tip but also, and to an even greater extent, with the appearance of such stresses at the tips of other cracklike defects, i.e., pores. Unstable crack growth is due to the merging of microcracks formed at pores into a main crack.
KeywordsPeak Stress Main Crack Sintered Material Unstable Crack Unstable Crack Growth
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