Abstract
Zirconia (ZrO2) dispersed aluminum alloy metal matrix composites produced by stir casting techniques. Using stir casting techniques, aluminium based composites with varying amounts of 3%, 6%, 9%, and 12% of zirconia by weight are fabricated. The prepared samples were subjected to physical, mechanical,tribiology and microstructure investigation. The extraordinary performance of Aluminium MMCs was the low density that obtained after alloying. Hardness and ductility were also increased when increase in Zirconia particle. Ultimate tensile strength, compressive strength and impact toughness were slightly increasing with the addition of zirconia particle. Microstructural characteristics shows that a homogeneous distribution of particles with reinforcement in casted composite. The investigations of the metallurgical characterization were carried using optical, scanning electron microscope, X-ray diffraction and Energy Dispersive Spectrometry (EDS) test to understand the metallurgical properties. Keywords: Metal-matrix composites (MMCs), Hardness testing, Tensile test, Compression test , Scanning electron microscopy (SEM), Energy Dispersive Spectrometry (EDS).
Highlights
Novel innovations and surging needs in automobile industry ask for modified metal matrix composites [1, 2]
The following conclusions are made from experimental results. This investigation analyzed the effect of various weight percentages of ZrO2 with LM25 alloy on the mechanical properties and metallurgical characterization and the results obtained from these studies are summarized as follows:
Physical test results of the developed LM25/ZrO2 and composites revealed that the sample cast at 12 wt% of ZrO2 reinforcement particles has a lower weight and all the cast samples are free from porosity
Summary
Novel innovations and surging needs in automobile industry ask for modified metal matrix composites [1, 2]. The aluminum based metal matrix composites are excellent novel materials for applications in aerospace, automotive and transportation industries [5-6]. In order to avoid this drawback, this LM25 alloy reinforced with ZrO2 to form LM25- ZrO2 composites This composite is used for marine casting, motorcar, engine parts, switch boxes, hydraulic systems (Piston, Cylinder) and food-processing industries. Among all the reinforcements used in aluminum based composites ZrO2 particulates alone have shown their potential superiority in improving mechanical properties and microstructure further ZrO2 particulates provides noticeable weight saving too [16-17]. In this field, Aluminium is the most popular matrix for the metal matrix composites. Most of the research works deal with aluminium matrix because of its natural light weight
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