Terminology

Stress required to cause fracture. So compressive strength is how much resistance it can withstand before fracture. Seen as fracture stress on the stress strain curve

It is a materials rigidity, the stress required to cause a change in shape. Seen as the initial gradient of the stress strain curve. Steeper = more rigid

Dimensions change experienced before fracture occurs. Seen as the distance on the X axis between proportional limit and fracture stress.

Resistance of a surface to indentation or abrasion

Gradual increase in permanent strain experienced under prolonged application of stress Occurs when material temperature is more than about half of its melting point

Two metals that are soluble in one another (alloy) Form a solid solution. Like a solution in chemistry but solid.

Two metals that from a common lattice structure and are soluble in one another

It can be formed by cold working, can be drawn into a wire.

Ability for a material to undergo large deflections - to form an arc - without permanent deformation

Ability to resist fracture during pulling

Ability to resist fracture during bending

Ability to resist the propagation of a crack Zirconia - tetragonal particles transform to stronger monolithic particle in response to crack

Change in size with change in temperature Gold has closest to tooth tissue

High elastic modulus - does not flex High casting accuracy Similar thermal expansion coefficient Biocompatibility Minimal wear to opposing dentition Aesthetically pleasing