Material Science

By:By: Juan Carlos UribeJuan Carlos Uribe

ΔT = 1,000,000 °C / s

• Non-crystalline, amorphous structure

No dislocations

No grain boundaries

• High elastic limit

• High strength

Discovered (1960’s)

California Institute of Technology

William L. Johnson

Atakan Peker

Metals used:

CopperNickel

ZirconiumBerylliumTitanium

• Golf clubs

• Fishing rods

• Car bumpers

• Aircraft skins

• Artificial joints

• Dies

• Cutting tools

• Others

• Small dimensions (due to cooling)

• Raw materials expensive

Approx. from $500 per pound

• Production expensive

HOT SPARKS FLY FROM A NOTCHED SAMPLE OF BULK METALLIC GLASS FRACTURED BY A BLOW FROM A PENDULUM

FRACTURED SURFACE SHOWS EVIDENCE OF LOCAL MELTING

REFERENCES

• http://www.lbl.gov/Science-Articles/Archives/spaparking-metallic-glass.html

• http://www.mat.ethz.ch/about_us/material_world/success...

• http://www.eurekalert.org/pub_releases/1998-03/

• http://science.nasa.gov/headlines/y2003/14apr_zeroglass.htm

• http://www.eng.auburn.edu/~wfgale/intro_metals/section3pg2.htm