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The ferromagnetic Fe-based amorphous alloys were studied due to properties for soft magnetic applications. Depending on different Nb addition, the formation of crystalline phases after annealing of amorphous Fe80−xB20Nbx (x = 4, 6, 10) alloys was studied. The crystallization products as well as the phase structure were determined using the Mössbauer spectrometry combined with differential scanning calorimetry and magnetic measurements. The addition of Nb caused a shift of crystallization process towards higher temperatures and induced changes in coercive force and decreased the saturation magnetization. It was found that Nb addition changed the crystallization process from single crystallization for Fe76B20Nb4 alloy to binary crystallization in the Fe74B20Nb6 and Fe70B20Nb10 glasses. The annealing process at the onset crystallization temperature induced complex phase formation including the α-Fe, Fe3B, and Fe2B phases for alloys x = 4, 6.

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Calcium-based alloys can be promising candidates for use as biodegradable implants because of attractive properties as mechanical, corrosive, and biocompatible. In the work, the biocompatibility authors discussed the results of the Ca32Mg12Zn38Yb18−xBx (x = 0, 1, 2, 3 at.%) and Ca32Mg12Zn38Yb18−2xBxAux (x = 1, 2 at.%) alloys. The tests were performed using a MTT assay. The corrosion behavior of such Ca-based alloys in PWE fluid at 37 °C was studied and compared with the results in Ringer’s solution from previous works. Electrochemical tests were presented by open circuit potential and potentiodynamic curves. Different concentrations of boron and gold in the alloys caused changes in the corrosion results. The best corrosion resistance in PWE solution was observed for the Ca-based alloy with 2 at.% Au due to the lowest value of the corrosion current density (jcorr), equal to 10.6 µA·cm−2. A slightly higher value of jcorr was obtained for the Ca32Mg12Zn38Yb15B3 alloy with the lowest roughness values. The results of the cytotoxicity tests also showed that the alloy with 3 at.% boron was characterized by the highest cell viability. The investigation results discussed in the work allow us to suggest that the presented calcium alloys with 3 at.% of B, and 2 at.% of Au addition may be promising materials for the use in implantology.

The properties of the material affect the quality of the manufactured product. Before transferring the finished product to the production phase and sending it to the customer, material tests should be carried out. Examined material properties such as chemical composition, phase composition, grain boundaries influence results obtained after measurements of the chemical composition. The spectrometers used in SEM or as separate XRFs can be compared due to the principle of operation. The main difference in EDS/WDX or XRF is the types of a beam that excite the characteristic X-rays radiation peaks. Unfortunately, both types of spectroscopy have limitations due to materials properties such as the application light chemical elements in alloys an example of B. As well as small quantities of chemical elements in used alloys that affect the obtained results.