Seal between two elements having different coefficients of thermal expansion

Seal (10) intended to be inserted between a first and a second element (4′, 6) respectively made of materials having different coefficients of thermal expansion, said seal being characterised in that it comprises:

• a first and a second metallic contact portion (16a, 16b) spaced along an axial stacking direction (8), said first and second metallic portions being respectively intended to contact said first and second elements tightly;
• tight connection means (14) between said first and second metallic contact portions (16a, 16b), allowing a relative movement between same along a radial direction (20) of the seal;
• and
• a first and a second sliding part (24a, 24b) along said axial stacking direction (8), and respectively coupled in translation along said radial direction with said first and second metallic contact portions (16a, 16b) between which they are inserted, so as to be able to slide in relation to each other along said radial direction (20).