Tuesday, March 12, 2013 3:10:56 AM
@CreamK - you didn't watch it all did ya. At about 6:45 the researcher states that the materials are readily available and CAN be produced on a large scale.
and we actually already do use this stuff (along with other memory metals) in many applications. memory metals are used for high pressure hydraulic line joints,and even for splinting bones together because they can be produced in one shape ,stretched , and then when inplanted body heat will make it return to its original shape pulling the bone tight.the same is done with pipe joins. I didn`t realize that the transition could happen so fast as this though. as a kid I remember reading about a concept where NASA wanted to compact a space compartment and let solar heat expand it back into a room.
Monday, March 11, 2013 11:59:56 AM
Why it hasn't been used? It`s intermetallic alloy. From wiki: "Nitinol is exceedingly difficult to make, due to the exceptionally tight compositional control required, and the tremendous reactivity of titanium. Every atom of titanium that combines with oxygen or carbon is an atom that is robbed from the NiTi lattice, thus shifting the composition and making the transformation temperature that much colder." It`s hard to process in to shapes and is subjected to metal fatique, allthou it`s superior to almost any other metal in that sense, it still breaks too easily.
Its` just too expensive to manufacture in quantities that would suffice the world market. More of a quirk than abundant material.
Monday, March 11, 2013 11:17:38 AM
From what I understand, the alloy has to be very precise in the Ni Ti mixture. I suspect the cost of manufacturing the metal made it cost prohibitive. The video mentions two years to pay for the metal if they could get the cost to $200 a pound. I'm not sure what that translates to today`s dollars, but certainly 1000s of dollars a pound. I think metal fatigue may be an issue as well. Metal bending back and forth 24 hrs a day, 7 days a week, seems like it would fail well before 2 years.