Abstract
Copper matrix composites reinforced with ZrB2 particles were produced in two ways: by hot pressing (HP) and laser-sintering process. Powder mixture Cu-Zr-B was mechanically alloyed before densification processes. Variations in the microstructure of treated samples obtained during cavitation test were analyzed by scanning electron microscopy (SEM). Cavitation erosion resistance was investigated with the standard test method for cavitation erosion using vibratory apparatus. Changes in mechanical alloying duration show a strong influence on cavitation erosion resistance of Cu–ZrB2 composites regardless the number of reinforcements. Laser-sintered samples show better cavitation erosion resistance than hot-pressed samples.
Highlights
In past decades, considerable attention was paid to the production of composite materials with the best combination of mechanical and physical properties
Size and distribution of reinforcements in copper matrix depend on their percentage and mechanical alloying duration or number of scans in case of laser-sintering and show a strong influence on mechanical properties [8, 26]
As was reported [6, 7], the presence of higher amount of submicron reinforcing particles in the copper matrix was observed after 30h of mechanical alloying (MA) comparing to 5h, which leads to higher hardness
Summary
Considerable attention was paid to the production of composite materials with the best combination of mechanical and physical properties. The present work includes analysis of the influence of mechanical alloying duration on the cavitation erosion resistance of copper matrix composites as well as the influence of different fabrication processes. Size and distribution of reinforcements in copper matrix depend on their percentage and mechanical alloying duration or number of scans in case of laser-sintering and show a strong influence on mechanical properties [8, 26].
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