Use of a gamma-method for investigating volumetric properties of iron and nickel alloys with chromium and boron within a temperature range of 290 to 2100 k

Subject of investigation: pure metals, binary and multi-component metal alloys. Purpose: study of the volumetric properties of metals, finding of a possibility of structural changes and microseparations in their liquid state, thermodynamic analysis of the nature of this phenomenon. Thermal oscillations of the thermal expansion coefficients of metals and alloys are revealed. The work shows that the melts of Fe-B, Ni-Cr and Ni-B close to the liquidus may be in a metastable colloidal condition. A thermodynamic analysis is made for the possibility of such states. The obtained values of the density and thermal expansion coefficients of metals and alloys can be used as reference data. The fields of existence of the colloidal microseparations provide a scientific basis for the optimization of the process of melting of alloys of Fe and Ni with Cr and B. The results of measurement of the density of heat-resistant alloys based on nickel were used during the development of the process of preparation of gas-turbine engine bladesAvailable from VNTIC / VNTIC - Scientific & Technical Information Centre of RussiaSIGLERURussian Federatio