Method for superconducting connection between MgB2 superconducting wires via a MgB2 matrix made from a boron powder compressed element infiltrated with Mg

A method for connecting two or more wires, each wire comprising at least one filament that contains MgB2 or a mixture of Mg and B, wherein a superconducting connection is realized at exposed end regions of the filaments via an MgB2 matrix the method comprising the steps of:

• a) inserting the exposed end regions of the filaments into bulk boron powder, the bulk boron powder being present in amorphous form;
• b) compacting the bulk boron powder together with the exposed end regions of the filaments following step a) to form a compressed element;
• and
• c) infiltrating the compressed element with molten magnesium, wherein an entire amount of the molten magnesium is introduced at a surface of the compressed element by disposing the compressed element in a pot and by subsequently filling the pot with molten magnesium.

A method for connecting two or more wires, each wire comprising at least one filament that contains MgB2 or a mixture of Mg and B, wherein a superconducting connection is realized at exposed end regions of the filaments via an MgB2 matrix, the method comprising the steps of:

• a) inserting the exposed end regions of the filaments into bulk boron powder, the bulk boron powder being present in amorphous form;
• b) compacting the bulk boron powder together with the exposed end regions of the filaments following step a) to form a compressed element;
• and
• c) infiltrating the compressed element with molten magnesium, wherein an entire amount of the molten magnesium is introduced at a surface of the compressed element by completely surrounding the compressed element with the molten magnesium.

A method for connecting two or more wires, each wire comprising at least one filament that contains MgB2 or a mixture of Mg and B, wherein a superconducting connection is realized at exposed end regions of the filaments via an MgB2 matrix, the method comprising the steps of:

• a) inserting the exposed end regions of the filaments into bulk boron powder, the bulk boron powder being present in amorphous form;
• b) compacting the bulk boron powder together with the exposed end regions of the filaments following step a) to form a compressed element;
• and
• c) infiltrating the compressed element with molten magnesium, wherein an entire amount of the molten magnesium is introduced at a surface of the compressed element by at least partially surrounding the compressed element with solid magnesium and heating the at least partially surrounded compressed element beyond a melting temperature of magnesium.