Near-order conservation in the Mg-In alloy (30 at.% In) near the melting point

It is shown that the near order in the relative position of different types of atoms is preserved in a Mg-In (30 at.% In) solid solution at temperatures close to the melting point. Diffuse scattering from this alloy is measured in a Cu K irradiated high-temperature vacuum chamber. The diffusion maximum in the region of the first superlattice lines decreases in intensity with increasing temperature. The tape diffraction pattern shows that at 440C the structure lines become a blurred scattering maximum, similar to that observed in any liquid or amorphous body. A rather intense maximum is simultaneously observed at the same angles at which the maximum due to the near order in a solid solution is observed.Translated from Izvestiya Uysshikh Uchebnykh Zavedenii, Fizika, No. 1, 18–22, January, 1976.