Combined Effect of CrB 2 Micropowder and VN Nanopowder on the Strength and Wear Re-sistance of Fe‒Cu–Ni–Sn Matrix Diamond Composites

Autor: Boranbay Ratov, Volodymyr Mechnik, Miroslaw Rucki, Edwin Gevorkyan, Arturas Kilikevicius, Vasyl Kolodnitskyi, Zbigniew Siemiatkowski, Gulzada Umirova, Leszek Chalko, Jerzy Jozwik, Arailym Zhanggirkhanova, Volodymyr Chishkala, Dmytro Korostyshevskyi
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Advances in Sciences and Technology, Vol 17, Iss 1, Pp 23-24 (2023)
Druh dokumentu: article
ISSN: 2080-4075
2299-8624
22998624
DOI: 10.12913/22998624/157394
Popis: The paper presents research results on the enhancement of diamond composites designed for tools application for mining industry, hard rocks cutting, able to withstand harsh conditions under heavy dynamical loads. In the present study, both CrB2 micropowder and VN nanopowder additives were used in proportions up to 5 wt.% and 6 wt.%, respectively, together with the basic matrix composition of 51 wt.% Fe, 32 wt.% Cu, 9 wt.% Ni, and 8 wt.% Sn. Addition of both components, CrB2 and VN, appeared to be ad-vantageous in proportion of 2 wt.% and 4 wt.%, respectively. This composition exhibited the highest relative density of 0.9968, better than that without additives. Similarly, the highest values of compressive strength Rcm and flexural strength Rbm were reached for the composite with the same percentage of CrB2 and VN. Compared to the composite with no addition of CrB2 and VN, Rcm improved by almost 70%, while Rbm by 81%. Additionally, the abovementioned additives enhanced the ability of the matrix to prevent the diamond reinforcement from being torn out of the composite, which is very important under harsh working conditions of the cutting tools. The presence of CrB2 micropowder and VN nanopowder promoted densification of the matrix and adhesion between the diamond grits and the Fe‒Cu–Ni–Sn matrix.
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