Nanomaterials synthesis

Magnetron Sputtering, equipped with 3 simultaneous sources (2RF+1DC)

Magnetron sputtering is a thin film fabrication technique that makes use of a plasma of an inert gas. The ions from the plasma are accelerated against a target of the desired material, kicking out some atoms that then deposit on the sustrate. This technique allows for the deposition of materials with high melting point that could not be deposited by evaporation. Our sputtering setup is equipped with three cathodes which can be controlled by two RF and one DC generator, thus granting us the capability of sputtering simultaneously up to three materials and to deposit both conductive and non-conductive films.

Inert Gas Condensation setup for particle growth

Electric Arc Furnace

An Electric Arc Furnace (EAF) is designed for the alloying of elemental compounds via an electric arc. The latter is generated within an Argon atmosphere using a high-voltage generator. The generator can deliver currents in the hundreds of amperes (A) range  through a tungsten-lanthanum-doped W/W:La electrode. The EAF's operating capabilities allow it to reach temperatures as high as 3500 °C, enabling the complete melting of any metal.

 The core component of the EAF is a water-cooled copper crucible that serves as the melting chamber. This chamber holds the elemental rods, clamps, or foils subjected to the alloying process. The design ensures efficient heat management and prevents overheating, promoting operational efficiency and safety.

 The controlled environment within the EAF is maintained through multiple vacuum cycles facilitated by a turbo-molecular pump. Additionally, an Argon atmosphere is introduced during alloying, supplemented by an initial treatment involving a high-affinity getter, often composed of titanium (Ti). This getter minimizes the risk of unwanted poisoning during alloying.

 An advantage of the arc melting technique is its ability to achieve high homogeneity after a few melting cycles. Natural convection within the molten material, driven by the high-temperature operation, promotes uniform synthesis, making the technique preferable for achieving impressive results compared to methods like mechanical alloying.

 In conclusion, the Electric Arc Furnace (EAF) stands as a pioneering technology in alloying elemental compounds. Furthermore, its capability to yield highly homogeneous alloy compositions positions it as a key player in modern alloying techniques.

Atomic Layer Deposition

coming soon...