Effect of seeding on the thermal conductivity of self-reinforced silicon nitride. [EN]

Authors of the publication: - Hirosaki N - Okamoto Y - Munakata F - Akimune Y

Thermal conductivity of Si3N4 containing large beta-Si3N4 particles as seeds for grain growth was investigated. Seeds addition promotes growth of beta-Si3N4 grains during sintering to develop the duplex microstructure. The thermal conductivity of the material sintered at 1900 degrees C.

Thermal conductivity measurements of impregnated Nb3Sn coil samples in the temperature range of 3.5 K to 100 K [EN]

Authors of the publication: - T Koettig - W Maciocha - S Bermudez - J Rysti - S Tavares - F Cacherat - J Bremer

In the framework of the luminosity upgrade of the LHC, high-field magnets are under development. Magnetic flux densities of up to 13 T require the use of Nb3Sn superconducting coils. Quench protection becomes challenging due to the high stored energy density and the low stabilizer fraction.