Effect of Compressive Creep and Hydrostatic Pressure on Diffusion in NiCr and NiSi Systems

Interdiffusion coefficients were measured in NiSi and NiCr systems from diffusion couples under hydrostatic pressures between 50 326 MPa, at 1200 °C. Uniaxial compression creep tests also carried out on Ni–Cr 885 °C, 940 °C 1000 with stress values 0 25 to observe the effect of applied diffusion. A numerical inverse method was elaborated determine interdiffusion that takes into account plastic strain. The comparison all shows no significant for a slight decrease hot isostatic pressing (HIP) both when compressive increases. This variation is less than twofold, thus negligible compared scatter observed one coefficient different sources literature.