ABOUT THE NATURE OF INELASTIC DEFORMATION OF HTSC CERAMICS IN REGION TEMPERATURE BELOW T-C

For Y- and Bi-based ceramics in superconducting state the results of t he experimental studying the deformation under the loading are present ed. The acoustic emission signals, the peculiarities of the intrinsic friction spectrum and ones of the planar contact resistance are studie d. These results confirm the full analogy of the inelastic deformation processes at T<T-c for HTSC ceramics and for metals.