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This work concentrates on the impact and contribution of zirconium carbide (ZrC) and magnesium to the mechanical and tribological properties of aluminium matrix composites. Distinctive weight portions of zirconium carbide, containing fixed weight fractions of magnesium and strengthening aluminium composites, were prepared utilising the entrenched cold-press sintering technique used in powder metallurgy. The uniform powder mixture was obtained by using planetary ball milling and it was then observed by using the scanning electron microscope technique. The hardness of the hybrid composite increased along with increase in the amount of the ZrC particle. The wear losses of sintered Al-Mg-ZrC composites were explored by directing sliding tests in pin-on-disc equipment. Hybridisation of reinforcements also decreased the wear loss of the composites at high sliding load and speed. This study reveals that the hybrid aluminium composite can be considered a unique material with high strength, low weight and wear resistance that will find their application in components to be used in the automobile and aero space engineering sectors.
High-energy mechanical alloying method was used to prepare Al-12Si-xZrC (x = 0, 5, 10, 15 wt. %) nanocomposites. Cylindrical preforms were prepared with an initial preform density of 89% by using a suitable die and punch assembly. The preforms were sintered in a muffle furnace with an inert gas atmosphere at a temperature of 550°C, followed by cooling until room temperature has been attained. Scanning electron microscope (SEM) and X-ray diffraction (XRD) techniques were used to characterize the composites. Pin-on-disc wear testing machine was used to determine the tribological properties of the prepared composites. The results show that the wear loss reduced with increasing the reinforcement content and coefficient of friction increases gradually.
In the present study, Cu–4Cr–xZrC nanocomposites have been developed through powder metallurgy route by varying the proportions of zirconium carbide viz. (0–10 wt.%). The required green compacts were prepared using die set assembly in a compression testing machine. Consequently, the hot extruded samples were tested for dry sliding wear and friction using a pin-on-disc machine. SEM, XRD, pin on-disc system and Vickers hardness tester were used to evaluate the characterization, tribological properties and hardness respectively of Cu–4Cr–xZrC nanocomposites. From the observations, it was found that the friction coefficient increased progressively with increasing load and sliding distance. Furthermore, the specific wear rate (SWR) decreased for the Cu–4Cr–xZrC nanocomposites when compared to composites that of pure copper. Hardness increases with the addition of nano ZrC content into the matrix composites.
Azotki, węgliki i węglikoazotki cyrkonu nanoszono metodą BARE (aktywowane, reaktywne naparowywanie z polaryzacją podłoży). Badano właściwości elektryczne, mechaniczne i strukturalne nanoszonych warstw. Stwierdzono istnienie silnej korelacji pomiędzy napięciem polaryzacji podłoży a twardością osadzanych warstw. Obserwacje mikroskopowe wykazały, że warstwy bardzo dobrze odwzorowują powierzchnię podłoża.
Zirconium nitrides, carbides and carbonitrides layers were deposited by BARE method (Bias Activated Reactive Evaporation). Electrical, mechanical and structural properties of deposited layers were examined. Strong correlation between bias voltage and hardness of the layers was observed. SEM investigations, point on very good mapping between substrate and deposited layers surface.
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