Microstructure-Properties: I Fracture Toughness - Materials Science ...
Microstructure-Properties: I Fracture Toughness - Materials Science ...
Microstructure-Properties: I Fracture Toughness - Materials Science ...
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30<br />
Objective<br />
Overview<br />
Crack<br />
Minimztn.<br />
Energy<br />
Absrptin.<br />
2A Transformation toughening:<br />
microstructure<br />
• Microstructural evidence for<br />
the transformation is<br />
obtainable through x-ray<br />
diffraction and Raman<br />
spectroscopy (the two different<br />
forms of zirconia have quite<br />
different infra-red spectra).<br />
• (a) lenticular particles of MgOstabilized<br />
ZrO 2 (untransformed)<br />
in cubic ZrO 2 .<br />
(b) transformed particles of<br />
ZrO 2 around a crack (dashed<br />
line).<br />
[Chiang]
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