MEASUREMENTS OF THE ELASTIC CONSTANTS, THE SPECIFIC HEAT AND THE ENTROPY OF GRAIN BOUNDARIES BY MEANS OF ULTRA-FINE GRAINED MATERIALS D. KORN, A. MORSCH, R. BIRRINGER, W. ARNOLD et H. GLEITERJ. Phys. Colloques, 49 C5 (1988) C5-769-C5-779DOI: https://doi.org/10.1051/jphyscol:1988596