Abstract
The article presents studies aimed at identifying the effect of the addition of volcanic tuff, rocks with ceramic properties, on the properties of brass and bronze, which make up the metal matrix of the composite. The research methods included: structure study (microscopic observations using an optical microscope and a scanning microscope), EDS analysis, as well as testing of composites for abrasion and microhardness. The results of the study of samples formed by tuff with brass and bronze show the stability of the structures obtained. Microscopic observations confirm that the distribution of mineral filler particles is uniform. No significant gaps were found between the filler and the matrix. The results of mechanical abrasion tests were the best and the maximum increase in hardness values was achieved with 10% addition of tuff to brass and bronze matrices
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