Akademik Veri Yönetim Sistemi
ADVANCING THROUGH APPLIED SCIENCE AND TECHNOLOGY, Assist. Prof. Dr. Serkan GÜLDAL, Editör, İksad Yayınevi, İzmir, ss.85-97, 2023
In this study, hybrid
composites were prepared by adding boron (B) and cobalt (Co) to copper (Cu)
powder at certain ratios (99%, 98%) with the weight remaining constant at 1%. A
review of the literature shows that Cu has been combined with different materials,
but not a hybrid mixture as in this study. It is aimed to improve the
tribological properties of Cu matrix composites with B and Co reinforcement and
to expand the usage areas of Cu matrix materials. In the study, Cu, B and Co
powders were mixed in a mechanical grinder at 250 rpm. The blends were prepared
with powder metallurgy manufacturing parameters (pressing, sintering, test
sample preparation) and the microstructures of the samples were characterized
by SEM and XRD analysis, and tribological hardness and wear tests were
performed. For each composite, the weight loss, coefficient of friction values
and the wear marks on the wear surfaces after abrasion were examined by SEM
images.
As a result of the
analysis and tests, 17.84% higher hardness results were obtained in Cu-Co
composite, 44.21% higher in Cu-B composite and 41.60% higher in Cu-Co-B
composite compared to pure Cu sample with B and Co additives in hardness tests.
Similarly, Co and B additives significantly increased the wear resistance of Cu
matrix material in wear tests.