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Aluminum matrix composite materials (AMCs) are widely used in components for the aerospace and automotive industries [1]. These compounds show a high strength/weight ratio, good mechanical properties and greater durability due to the addition of particles as reinforcements [1,2]. The present work will focus on the study of the reinforcement of AA 6061 alloy with particles of CaSiO3 (wollastonite). Powder metallurgy is widely used to control the dispersion of particles in AMCs [3,4]. The present work aims to study the influence of different contents of CaSiO3 on the microstructure of the alloy matrix and the effect of the powder metallurgy technique by optical microscopy (OM), scanning electron microscopy and energy dispersive X-ray spectroscopy (SEM / EDS).

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Potassium Triniobate KNb3O8 is an inorganic material that has promising photocatalytic applications for removing pollutants from wastewater [1]. Although there are different approaches to obtain this material, solid-state reactions at high temperature are used for obtaining powders of KNb3O8 [2]. Herein, we report the synthesis of KNb3O8 powders by solid-state reaction at 800˚C for 3h of Nb2O5 and KCl. 0.26581 g (1 mmol) of Nb2O5 (99.5%, Alfa Aesar, USA), 0.3727 g (5 mmol) of KCl (99.0 % Sigma-Aldrich, México) and 100 µL of deionised water were mixed to form. The paste was ground in an agate mortar for 20 min. Then, the powders were placed in a conventional furnace and heated at 800˚C for 3h. The powders were structurally characterised through Raman spectroscopy using a HORIBA Scientific LabRAM HR spectrometer integrated with laser light of 632 nm and by Field Emission Scanning Electron Microscopy (FESEM) within the JEOL JSM-7800F microscope.

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