Effect of Zn Content on Microstructure and Mechanical Properties of MgZnYLaMM Alloys

The effect of Zn content on microstructure, existing phases, and mechanical properties of rapidly solidified MgZnxY1LaMM1Mn0.5 alloys (X = 2, 3, 4 at. pct) has been investigated. To assess the microstructural characterization of nanocrystalline alloys, the study also includes microstructural characterization of the master alloys. The microstructure of the alloys in as-rapidly solidified condition consisted of supersaturated magnesium dendrites and fine (Mg,Zn)17La2 and W phase (Mg3Y2Zn3) segregated at grain and cell boundaries. During continuous heating, the metastable solid solution in Mg dendrites breaks down, increasing the volume fraction of secondphase particles. After annealing for 1 hour at 673 K (400 C), very small spherical Mn-rich precipitates appeared in the three alloys and a long-period stacking ordered (LPS) phase of rectangular morphology precipitated inside the Mg grains in the alloy with the lowest Zn content. The nanocrystalline nature of the ribbons accounts for thePeer Reviewe

The effect of clay on foaming and mechanical properties of glass foam insulating material

In the current study, the main composition was prepared using soda-lime glass with dolomite [CaMg(CO3)(2)] as a foaming agent. The clay powder was added to the main composition in different ratios, and then, the mixtures were shaped by one-axial pressing. Differential thermal analysis (DTA) was used for the determination of crystallization temperatures, and the samples were heated according to the DTA results. Furthermore, heating microscopy was employed for studying the high-temperature behaviours of the mixtures. The samples were characterized using scanning electron microscopy, X-ray diffraction analysis, and comprehensive strength testing. Porosity and bulk density were measured to assess the foaming capability of the mixtures. The results showed that clay addition has a positive role on the mechanical properties of glass foam