A NEW SEALING TECHNIQUE FOR INTERNAL FRICTION MEASUREMENTS ON HIGH PURITY NIOBIUM B. J. MOLINAS, M. WELLER, K. SCHULZE et J. DIEHLJ. Phys. Colloques, 48 C8 (1987) C8-341-C8-346DOI: https://doi.org/10.1051/jphyscol:1987850