Effect of Graphite Addition on Aluminum Hybrid Matrix Composite by Powder Metallurgy Method

Abstract

The requirement for optimal strength and lightweight materials is a challenge in today's automotive industry. In this study, the synthesis of aluminum matrix hybrid composites containing magnesium and copper with the addition of graphite 0, 1, 3, and 5% by volume was carried out using powder metallurgy techniques and investigated the effect of the treatment given. The investigation of composite properties was carried out by testing density, porosity, hardness, wear rate, XRD, and SEM investigations integrated with EDS. Optimal conditions indicated composite with a content of 5% volume of graphite with the lowest porosity level of 5.10%, the relative density of 88.67%, and the highest hardness at 50.37 HV, followed by superior wear resistance. This result is supported by observing secondary phase formation and microstructure through XRD and SEM-EDS. The addition of graphite in the composite supports optimizing physical and mechanical properties as a lightweight composite. It deserves to be considered as an alternative material for automotive components.

Pengaruh Pemadatan Dua-arah Penekanan Terhadap Densitas dan Kekerasan AMC diperkuat Serbuk Silikon Dioksida

“…Terdapat berbagai metode dalam pembuatan komposit, seperti stir casting, powder metallurgy, compo casting, friction stir casting, roll bonding dan lain-lain [1]. Namun demikian metode powder metallurgy atau metalurgi serbuk memiliki beberapa keuntungan dibandingkan dengan proses lainnya, sehingga pembuatan komposit dengan teknologi metalurgi serbuk ini semakin dikembangkan pada akhir-akhir ini [2].…”

“…Beberapa keuntungan pembuatan komposit dengan metode metalurgi serbuk adalah energi proses yang rendah [3], lebih ekonomis karena lebih sedikit bahan yang hilang atau sebagian besar bahan baku menjadi produk jadi [4]. kecepatan produksi tinggi karena dapat memproduksi produk secara massal, dapat memproduksi produk dengan bentuk yang rumit dengan ukuran kecil, serta mudah dalam mengontrol parameter proses produk serta mampu memproduksi produk dengan dimensi yang lebih akurat [1]. Proses utama pada teknologi metalurgi serbuk ada tiga tahapan yaitu tahapan proses pencampuran serbuk matrik dengan serbuk penguat, tahapan proses penekanan atau kompaksi dan tahapan proses sintering [5].…”

“…Material komposit dengan matrik polimer (resin) dan matrik logam aluminium, dengan penguat oksida logam, karbida, karbon, serat alam dan lain-lain akhir-akhir ini banyak diteliti dan dikembangkan guna diaplikasikan pada komponen otomotif [1]. Material aluminium, secara umum memiliki beberapa keunggulan, diantaranya adalah ringan, lebih tahan terhadap korosi, karena aluminium merupakan logam yang bersifat reaktif sehingga mudah teroksidasi dengan ogsigen membentuk lapisan aluminium oksida atau Alumina (Al 2O3) [11].…”

Investment Jute Fiber as Environmental Waste to Reinforcement Polyester Resin, Epoxy Resin and its Mixtures Used in home applications

“…Polymer-based composites are intended for performance, durability, and resistance to applied stress and temperature [1]. Resin polymer composites reinforced with natural or synthetic fibers were used in the 30s of this century [3]. Due to the increasing economic requirements, there was a need for natural materials to replace synthetic materials such as jute and others to support polymeric materials, so their residues were used to support these materials [4].…”

Experimental Investigations of Al-Cr3C2 Composite Preform Densification and Deformation

“…Shahid et al [28] investigated the porosity, density, wear and hardness of aluminium matrix hybrid composites with addition of varying amounts of graphite. The conclusions of the study are the composition with 5% volume of graphite showed better performance in terms of improved mechanical properties.…”