Increased interest in polymer composites filled with natural organic fillers, fillers derived from renewable sources and biodegradable, has resulted from growing concern about environmental concerns and, on the other hand, the desire for more adaptable polymer-based materials. The composites, which are often, referred to as "Green," have a wide range of industrial uses. This research conducts a literature assessment in the wide field of green composites in order to identify materials with the potential to be used on automobile body panels in the near future. Materials derived from renewable resources will be favoured over finite fossil goods from now on. When the polymer matrix is biodegradable and originates from renewable sources, these composites may be even more environmentally beneficial. This rapid overview (with no pretence of exhaustiveness over such a big issue) demonstrates the major routes and findings of study (both academic and industry) on this relevant subject, as well as acceptable sources for further in-depth studies.
Hybrid copper alloy composites are widely used in numerous industrial applications, such as aeronautics and automobile, because of their wear resistance and excellent cast ability. They are widely used for high load and low speed application such as stone crushers and earth movers. The pin-on-disc dry sliding wear investigation and microstructure characterization of copper alloy reinforced with Al2O3 and graphene particulates were conducted. Stir casting technique is used to prepare the composites. Wear loss of hybrid composite (Cu alloy + 4wt.% Gr + 4wt.% Al2O3) is compared with Cu alloy, Cu alloy + 4wt.% Gr and Cu alloy + 4wt.% Al2O3. In microstructural analysis SEM and EDS images were assessed to know the distribution uniformness of reinforcement in copper alloy matrix. Dry wear test was carried on pin on disc machine. In the first trial, the sliding speed was kept as constant to 300 rpm and load was varied in range of 1 kg, 2 kg and 3 kg. In the second trial, the load was kept as constant and the sliding speed was varied in range of 100, 200 and 300 rpm. Results in both trials have shown that the wear resistance was increased and wear rate was very low in hybrid composite (Cu alloy + 4wt.% Gr + 4wt.% Al2O3) compared to the other compositions of the tested composites.
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