Abstract
In this work, nanosized Boron nitride and silicon carbide reinforced ZA - 12 matrix hybrid composites were produced using stir casting technique with using of aluminum scrap (AA 2024), pure Al (electrical wires) and zinc scraps. Microstructure Observation was revealed by using scanning electron microscopy, and the analysis showed a uniform distribution of (SiC and BN) hybrid nanoparticles for the Zn-Al matrix. Also, an optical microscope was used to display the dendritic structure and reinforcement particles that dispersed uniformly in the matrix. Mechanical tests results confirmed that the hardness and the compression was increased with increasing the hybrid nanoparticle's percentage, whereas the wear rate decreased as the reinforcing materials increased. Since nanoparticles restrict dislocation movement, the mechanical properties are enhanced. The improvement ratio in hardness after addition was 26%., and in wear rate was 24% and for the compression strength the improvement was (19%).
Highlights
The materials engineering researchers have dedicated their attention for developing and creating a strong, light and less cost engineering materials
Wear Test: A dry sliding wear experiment for (ZA-12) alloy reinforced with nano-boron nitride (BN) and nano-silicon carbide (SiC) was performed by using a pin on disc wear device according to the standard (ASTM G99-95) [14]
The microstructure and Scanning Electron Microscopy (SEM) analysis showed that the particles distributed uniformly in the base matrix-supported with the weight percentages of nano reinforcement (BN and SiC) explaining the mechanical properties enhancement
Summary
The materials engineering researchers have dedicated their attention for developing and creating a strong, light and less cost engineering materials. These alloys have remarkable properties, for example high strength, great castability and tribologically properties, corrosion resistance, low melting point, very good bearing and wear resistance properties and manufacturing with low cost These composite alloys in different applications can compare popular engineering materials, like steel, cast iron, magnesium, aluminum and other reinforcement metals and alloys [2, 3, 4]. The main aim of manufacturing (ZA-12) MMC material is whose zinc as well as its alloys provide a high strength to weight ratio It is increased by adding various kinds of hard ceramic particles to MMCs. The research focus on improving the microstructure and mechanical behavior of (ZA-12) alloy and its hybrid composites to further increase the utilization of MMC in the industry
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