In ecological trials performed at the Research Institute of Crop Production Prague-Ruzyne (beet-and wheat subtype of Bohemia), 111 new varieties and cultivars were evaluated in 1983-1989. The tested ...cultivars exhibited above-average yields of grain in comparison with the Czechoslovak cultivar Regina: CSFR-Selekta; GDR-TAW 51.42512/83; USSR-Ljutescens 2522/82; in the yield levels CSFR - 25, GDR - 20, Poland - 30, USSR - 6; below-average - 27 new breeds. The tested cultivars were evaluated as to the most important traits in connection with the breeding strategies used in the given countries.
The scanning electron microscopy, X-ray diffraction, positron annihilation spectroscopy, Mössbauer spectrometry, and measurements of magnetic characteristics by vibrating sample magnetometer ...complemented by theoretical simulations are applied in the present investigations of the Fe-Al-Co alloys with 25 at% Al and Co substituting Fe in amount of 15 at% or 25 at%. The alloys prepared by slightly different technologies resulting in different structural morphologies are subjected to thermal treatment followed by slow cooling and water cooling. It is shown that the alloy with lower Co content and the initial A2 structure is more sensitive to the thermal treatments from the viewpoints of changes in morphology, defects concentration and magnetic properties in comparison to the other one with the initial B2 structure. This is reflected almost in all experimentally obtained results.
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•Fe-25 at.% Al and Co substituting Fe alloys are prepared and thermally treated.•Morphology, phase, defect, and magnetic studies are concentrated to region of phase separation.•Hysteresis loops are simulated by the Jiles-Atherton model extended for anisotropic materials.•Theoretical calculations of lifetimes determine type of defects.•Vacancies, vacancy clusters and/or triple defects are discussed from the structural and compositional viewpoint.
