Pourquoi c'est important pour les matériaux
An aero-engine turbine blade sits in gas hotter than the alloy's melting point and survives because of rhenium, hafnium and a ceramic coating. That is why a few tonnes of a by-product metal can be a national-security question.
De quoi c'est composé
Tous les matériaux →| Matériau | Ce qu'il fait ici | Importance |
|---|---|---|
| Aluminium critique | Airframe skin and structure | Définition de |
| Cobalt critique | Superalloy binder and magnets | Définition de |
| Gallium critique | Radar transmit-receive modules | Définition de |
| Hafnium critique | Superalloy and control rods | Définition de |
| Nickel critique | Superalloy for hot sections | Définition de |
| Rhenium critique | Single-crystal superalloy | Définition de |
| Titanium critique | Airframe and engine structure | Définition de |
| Antimony critique | Ammunition primers and flame retardants | Important |
| Beryllium critique | Optics and inertial guidance | Important |
| Germanium critique | Infrared optics | Important |
| Samarium critique | High-temperature magnets | Important |
| Tantalum critique | Superalloy and capacitors | Important |
| Tungsten critique | Penetrators and counterweights | Important |
| Yttrium critique | Thermal barrier coatings | Important |
| Scandium critique | High-strength aluminium alloy | Présent |

Aluminium
A light silvery metal made by passing an enormous electric current through dissolved bauxite — which is why people…

Cobalt
A hard, bluish metal that keeps a battery's cathode stable so it does not overheat, and that holds its strength when…

Gallium
A silvery metal that melts in your hand, and the basis of the compound semiconductors in fast chargers, radar and…

Hafnium
Zirconium's chemical shadow — always found with it, almost impossible to separate from it, and the opposite of it in…

Nickel
A silvery metal that resists rust, which is why it goes into stainless steel — and, more recently, into the cathodes…

Rhenium
One of the rarest metals in the crust, recovered from molybdenum roasting, and the ingredient that lets a jet turbine…
