The invention relates to materials made of thin layers as hard multilayers adhering to metal substrates of NiCr and CoCr on which they are deposited, exhibiting corrosion resistance and biocompatibility properties, meant to be used to improve adhesion between metal and ceramics within fixed prosthetic restorations of the metalo-ceramic type obtained by a method of physical deposition in vapour state. According to the invention, the material is made of successive layers, the first layer being a MeN nitride layer, where Me is one of the metals in the series Ti, Zr, Cr and Ta, the second layer being a MeSiN silicon-nitride layer and the third layer being a silicon-oxy-nitride layer, having the total thickness in the range of 1.3...3.3 &mum, exhibiting high adherence to the substrate, normal critical forces upon the scratch adhesion test in the range of 48...68 N, a hardness in the range of 26...38 GPa, the ion amount released in Fusayama artificial saliva being < 25 &mu g/cm, the corrosion rate < 4x10mm/year and a cell viability factor >85% upon the cytotoxicity test, the metal substrate-multilayer-ceramics system exhibiting stresses of breaking up/crack initiation upon the three point bending tests in the range of 30...50 MPa which are superior to those of the systems without adhesion layer that range between 26...28 MPa.Invenţia se referă la nişte materiale realizate din straturi subţiri, sub formă de multistraturi dure şi aderente la substraturile metalice de NiCr şi CoCr pe care au fost depuse, rezistente la coroziune, cu proprietăţi biocompatibile, utilizate pentru îmbunătăţirea aderenţei dintre metal şi ceramică, din cadrul restaurărilor protetice fixe, de tip metalo-ceramică, obţinute printr-o metodă de tip depunere fizică din fază de vapori. Materialul conform invenţiei este realizat din straturi succesive, în care primul strat este unul de nitrură MeN, unde Me este unul dintre metalele din seria Ti, Zr, Cr şi Ta, al doilea este un strat de silico-nitrură MeSiN
