Investigation of microstructure and mechanical properties of nano MgO reinforced Al composites manufactured by stir casting and powder metallurgy methods: A comparative study

Abdizadeh, Hossein; Ebrahimifard, Reza; Baghchesara, Mohammad Amin

doi:10.1016/j.compositesb.2013.08.023

Cited by 175 publications

(59 citation statements)

References 15 publications

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“…All phases have been identified by EDX analysis. A variety of intermetallic compound (IC) phases have been formed by reactions (1) to (7). Regarding the case of K 2 TiF 6 employment, the occurrence and topography of coarse polygonal particles of Al 12 W is attributed to a sequence of peritectic reactions (5) & (6), the microstructural outcome of which is clearly illustrated in Fig.…”

Section: Effect Of Different Wetting Agents On the Microstructure Of mentioning

confidence: 97%

“…Besides being located intergranularly, Al 3 Ti phase is also frequently found inside Al grains (Fig. 1h), a location justified by peritectic reaction (7).…”

Section: Effect Of Different Wetting Agents On the Microstructure Of mentioning

confidence: 99%

“…An effective remedy for the complicated fabrication route, can be the application of conventional casting methods, due to assets such as, low cost, ease-to-handle advantages, mass production abilities, strong matrix-particle bonding, relatively easy control of matrix structure and near net shape [3]. Towards a casting based production, Aluminum Matrix Composites (AMCs) reinforced with nanoparticles of SiC [4], B 4 C [5], Al 2 O 3 [3,6], MgO [7], AlN [8], TiB 2 and TiO 2 [9], fly ash [10], etc. have been investigated.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Wetting Agent and Carbide Volume Fraction on the Wear Response of Aluminum Matrix Composites Reinforced by WC Nanoparticles and Aluminide Particles

Lekatou¹,

Gkikas²,

Karantzalis³

et al. 2017

Archives of Metallurgy and Materials

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Aluminum matrix composites were prepared by adding submicron sized WC particles into a melt of Al 1050 under mechanical stirring, with the scope to determine: (a) the most appropriate salt flux amongst KBF 4 , K 2 TiF 6 , K 3 AlF 6 and Na 3 AlF 6 for optimum particle wetting and distribution and (b) the maximum carbide volume fraction (CVF) for optimum response to sliding wear. The nature of the wetting agent notably affected particle incorporation, with K 2 TiF 6 providing the greatest particle insertion. A uniform aluminide (in-situ) and WC (ex-situ) particle distribution was attained. Two different sliding wear mechanisms were identified for low CVFs (≤1.5%), and high CVFs (2.0%), depending on the extent of particle agglomeration.

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Section: Effect Of Different Wetting Agents On the Microstructure Of mentioning

confidence: 97%

“…Besides being located intergranularly, Al 3 Ti phase is also frequently found inside Al grains (Fig. 1h), a location justified by peritectic reaction (7).…”

Section: Effect Of Different Wetting Agents On the Microstructure Of mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Wetting Agent and Carbide Volume Fraction on the Wear Response of Aluminum Matrix Composites Reinforced by WC Nanoparticles and Aluminide Particles

Lekatou¹,

Gkikas²,

Karantzalis³

et al. 2017

Archives of Metallurgy and Materials

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“…Compacting and sintering are often combined in one step during hot pressing [9]. Several composites can be prepared by powder metallurgy, for example SiC p /Al [10], Al 2 O 3 /Al [11] MgO/Al [12] WC/Ni [13].…”

Section: Introductionmentioning

confidence: 99%

Microstructure And Mechanical Properties Of Al-WC Composites

Simon¹,

Lipusz²,

Baumli³

et al. 2015

Archives of Metallurgy and Materials

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The scope of the research work is the production and characterization of Al matrix composites reinforced with WC ceramic nanoparticles. The synthesis process was powder metallurgy. The produced composites were examined as far as their microstructure and mechanical properties (resistance to wear, micro/macrohardness). Intermetallic phases (Al 12 W and Al 2 Cu) were identified in the microstrucutre. Al 4 C 3 was not detected in the composites. Adding more than 5 wt% WC to the aluminum, microhardness and wear resistance exceed the values of Al alloy. Composites having weak interface bond performed the highest wear rate.

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“…Adicionalmente, Fujiki (2001) indicó que esta tecnología puede ser usada ampliamente en el sector automovilístico debido a sus ventajas frente a la tecnología tradicional. Por otro lado, Abdizadeh et al (2014) realizaron el estudio de la microestructura y propiedades mecánicas de un compuesto reforzado con MgO, fabricado por fundición y metalurgia de polvos, donde se puso de manifiesto que el método de fundición presenta mayor homogeneidad y valores más altos de las propiedades mecánicas en comparación con la PM, debido a la baja porosidad presente en el material.…”

Section: Introductionunclassified

Efecto del reprensado en las propiedades mecánicas de guías de válvulas fabricadas por pulvimetalurgia

et al. 2017

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RESUMEN:Se determinaron la dureza, pérdida de masa y coeficiente de fricción, de guías de válvulas para motores de combustión interna fabricadas en latón por proceso de pulvimetalurgia, con el objetivo de conocer si cumplen con las exigencias que requiere un motor de combustión interna, utilizando como parámetro comparativo guías de válvulas comerciales de latón producidas por fundición. Se estudió, si las propiedades son homogéneas a lo largo de toda la guía de la válvula y se evaluó el proceso de reprensado que se lleva a cabo de manera adicional en la línea de producción. Se determinaron las durezas Brinell y Vickers; el coeficiente de fricción y la tasa de desgaste (ensayo pin on disk). Mediante microscopía electrónica de barrido y análisis metalográfico, se estudió el mecanismo de desgaste. Se llevó a cabo la determinación de la composición química de las guías y el efecto del reprensado cuantificando la porosidad superficial, mediante el software Analizador de imágenes Pro Plus ® . Se puso de manifiesto que las piezas fabricadas por proceso de pulvimetalurgia presentaron valores inferiores en sus propiedades mecánico-tribológicas en comparación con las guías de válvula comerciales. Estos resultados permitirán mejorar las condiciones de fabricación de las guías mediante pulvimetalurgia. ABSTRACT: Effect of repressing on the mechanical properties of the valve guides manufactured by powder metallurgy.Characterization of hardness, mass loss, and friction coefficient, was carried out on valve guides for internal combustion engines, manufactured by powder metallurgy, with the aim of finding out if they fulfill the requirements of an internal combustion engine and to be mass produced. Currently available brass casting valve guides were used as comparative parameter. It was analyzed whether properties were present in a homogeneous way in the piece lengthwise; the additional repressing process carried out in the production line with respect to the sintered guides was evaluated. Therefore, Brinell, Vickers and dry slip pin-on-disk tests were done in order to determine the friction coefficient and the wear rate. Scanning electron microscopy SEM and the metallographic analysis were used to study the wear mechanism, chemical composition of the guides, and the effect of repressing -quantifying the porosity. It was clear that these pieces manufactured by powder metallurgy process showed

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Investigation of microstructure and mechanical properties of nano MgO reinforced Al composites manufactured by stir casting and powder metallurgy methods: A comparative study

Cited by 175 publications

References 15 publications

Effect of Wetting Agent and Carbide Volume Fraction on the Wear Response of Aluminum Matrix Composites Reinforced by WC Nanoparticles and Aluminide Particles

Effect of Wetting Agent and Carbide Volume Fraction on the Wear Response of Aluminum Matrix Composites Reinforced by WC Nanoparticles and Aluminide Particles

Microstructure And Mechanical Properties Of Al-WC Composites

Efecto del reprensado en las propiedades mecánicas de guías de válvulas fabricadas por pulvimetalurgia

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