04765nam a2200397 n 4500952013800000952011600138999001700254003000800271005001700279006001900296007000300315008004100318020002200359040002300381090002900404100004800433245012700481264003400608264001200642300007000654336002100724336002100745337002500766337002300791338002300814338003000837347002400867500006800891502007000959504004001029520314301069610008304212650004504295650001104340942001604351  00102lcc40708REFa20000b20000cREFd2020-11-10l0oFTKPM .A99 2020 r ThesispT000001042r2020-12-28 00:00:00w2020-11-10yTHESIS  00102lcc40718REFa20000b20000d2020-11-10l0oCD12748pT000001043r2021-02-19 00:00:00w2020-11-10yTHESIS  c94766d94772MY-KuUP20251125105806.0a||||fr|||| 000 0 ta201110t20202020my a|||frma|| 000 0 eng d  aTHE0008579(Local)  aUMPbengcUMPerda  aFTKPM .A99 2020 r Thesis1 aAbdulqader Al-Maamari, Azzat Esam,eauthor.10aStudy on the mechanical and wear properties of Mg/sic/Gr hybrid metal matrix composite /cAzzat Esam Abdulqader Al-Maamari  aKuantan, Pahang :bUMP,c2020  a© 2020  axv, 106 pages :billustrations (some color) ;c30 cm. +e1 CD ROM  atext2rdacontent  atext2rdacontent  aunmediated2rdamedia  acomputer2rdamedia  avolume2rdacarrier  acomputer disc2rdacarrier  atext filebPDF2rda  aFaculty of Manufacturing and Mechatronic Engineering Technology  aThesis (Master of Science) -- Universiti Malaysia Pahang – 2020  aIncludes bibliographical references3 aNowadays, lightweight design with perfect mechanical properties is the major target in various industries, especially in the automotive and aerospace manufacturing. Therefore, magnesium (Mg) becomes one of the significantly demanding material for such industries in recent years due to its low density and high formability. However, Mg shows low wear resistance under insufficient lubricating conditions which limits its use in tribological applications. Therefore, self-lubricating materials are preferred because the solid lubricant contained in them can be automatically released during the wear process to reduce the wear. Graphite (Gr) is one of the materials which possess high lubricating characteristics. However, the limitation of graphite in adding magnesium matrix is that it significantly reduces the strength of the composite. Therefore, one solution could be to introduce a third material to the Mg-Gr composite to improve the strength of the composite. Silicon Carbide (SiC) is one of the popularly used ceramic materials whose introduction to the magnesium can increase the mechanical strength. The most important issue of composite fabrication is to maintain the uniformity of the reinforcement particles in the metallic matrix. The mechanical strength is significantly influenced by the particles homogeneity. Among the various fabrication techniques, powder metallurgy is considered to be an effective process as reinforcements uniformity can be achieved by this. Therefore, in this study, hybrid metal matrix composite (MMC) composed of magnesium matrix and SiC, Gr reinforcements has been developed by powder metallurgy technique and the effect of SiC and graphite content on the mechanical and the tribological behaviour of the Mg/SiC/Gr hybrid composite has been studied. The fabrication has been carried out in two phases. In the first phase, magnesium-graphite (Mg-Gr) composites with different weight percentage values of graphite were fabricated and their mechanical and wear properties were evaluated, and the optimum value of graphite was determined. After that, hybrid MMCs was fabricated by adding SiC and graphite reinforcement particles to the magnesium base material. At this stage, the percentage of the graphite particles kept constant (the value gave high wear resistance) but the percentage of SiC reinforcement varied in order to obtain the high mechanical properties. The raw powders with the desired percentage were mixed, compacted and sintered to produce the hybrid MMCs. The fabricated samples were then prepared for microstructural characterization, mechanical and tribological tests. The microstructure shows a proper bonding and uniform distribution of the reinforcement in the Mg matrix. The results revealed that all the mechanical properties, including hardness, tensile strength and flexural strength increases significantly and the tribological properties tremendously improved in the hybrid composite as compared to the pure magnesium and Mg-Gr composite. Moreover, the combined effect of 10% SiC and 5% Gr shows superior performance in both the mechanical and tribological properties.20aFaculty of Manufacturing and Mechatronic Engineering TechnologyxDissertations 0aUniversities and collegesxDissertations 0aTheses  2lcccTHESIS