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Presentation transcript:

Pykrete Power Point Presentation by Jacob Harris

Certain materials are included under the fair use exemption of the U.S. Copyright Law; Materials are included in accordance with the multimedia fair use guidelines; and Materials are restricted from further use.

What is Pykrete?

composite material made of 14% wood pulp and ice Pykrete is composite material made of 14% wood pulp and ice

Interesting Properties of Pykrete It has a slow melting rate due to low thermal conductivity It has an improved strength and toughness over pure ice, it is actually closer to concrete in strength It is slightly harder to form than concrete, because it expands while freezing

The History of Pykrete Invented by Max Perutz?? It is named after Geoffrey Pyke. He proposed that the Royal Navy make a huge, unsinkable aircraft carrier using this material during World War II

Durability of Pykrete A ship made of this material would be unsinkable; torpedoes could hit it and do little damage It has a crush resistance of greater then 3,000 per square inch, so a one-inch column could support the weight of a typical car The wood pulp in the material makes it extremely stable at high temperatures If a .303 caliber bullet is fired at the material, it will penetrate only 6.5 inches

Comparison of Ice and Pykrete These photos were taken on July 22, 2000 by J Gordon Holley Both the pykrete and ice were frozen in 1 gallon milk jugs for one week. The pykrete was 10% sawdust by weight Both were shot with a .243 rifle at 100 meters. A .243 bullet fired form 300 meters can push a 1 lb object for a distance of 1000 feet Ice-before Ice-after Pykrete-before Pykrete-after

Sources Wikipedia http://en.wikipedia.org/wiki/Pykrete.htm information Nobelprize.org http://nobelprize.org/chemistry/laureates/1962/perutz-bio.html Image SWalk http://www.swalk.com/habhead.html Grippy and Cormo http://www.geocitices.com/Broadway/1928/pykrete.htm Images and information