Aluminium–ferro-chromium composites produced by recycling of chips

Gronostajski, Z.; Marciniak, Henning; Matuszak, A.; Samuel, M.

doi:10.1016/s0924-0136(01)00966-9

Cited by 33 publications

(22 citation statements)

References 2 publications

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“…It indicates that the hardness of metal matrix composites was dependent to mass fraction of amorphous silica. However, the hardness of matrix material was decreased with composition of silica increased to more than 12 wt.% due to insufficient bonding between matrix and reinforced material because of poor wettability of rice husk ash with matrix material [5,10].…”

Section: Microhardnessmentioning

confidence: 99%

“…Due to the expansion of the use of aluminium, waste issue has been one of the many popular issues that have gotten worldwide concerns, and one other ways to reuse them starts from the automobile industry, by recycling automobile components [3]. Owing to the high energy requirement for mining and melting aluminium, replacing a part of the aluminium by recycling industrial wastes such as aluminium chips promise low production cost, not harming the environment and saving primary aluminium resources thus satisfying the modern industrial societies' aim [4]. During these developments, the environment is affected, one way or another.…”

Section: Introductionmentioning

confidence: 99%

“…During these developments, the environment is affected, one way or another. The development of low cost metal matrix composites reinforced with eco-friendly material has been one of the major innovations in the field of materials in the past few decades [5]. Several of wastes recycled composites have been used in developing most environmentally friendly agro-wastes as reinforcing fillers [6,7].…”

Section: Introductionmentioning

confidence: 99%

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Effect of amorphous silica by rice husk ash on physical properties and microstructures of recycled aluminium chip AA7075

Joharudin

Latif

Mustapa

et al. 2019

Materialwissenschaft Werkst

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High strength to weight ratio of aluminium reinforced as metal matrix composites is a well known material used in automotive application. The effects of recycled aluminium chips AA7075 with amorphous silica by rice husk ash on the physical properties and microstructure were investigated. Recycled aluminium chip AA7075 was reinforced with agro waste of amorphous silica rice husk ash i. e., 2.5 %, 5 %, 7.5 %, 10 % and 12.5 %. Samples of these metal matrix composites were prepared by cold compaction method due to the lower energies consumption and operating cost compared to conventional recycling by casting. Physical testing of density, apparent porosity, water absorption and hardness tests of the metal matrix composites samples were examined in the current study. The density of metal matrix composites was increased up to 5 % of amorphous silica, and then decreased with increasing mass fraction of amorphous silica. Porosity and water absorption of metal matrix composites were significantly consistent at increasing mass fraction of amorphous silica, while the hardness of metal matrix composites was increased at increasing amorphous silica. Consequently, the microstructures of metal matrix composites were observed via optical microscope to analyze the dispersion of the reinforced composites. The microstructures of metal matrix composites were found non‐homogeneous and random distribution of amorphous silica and aluminium chip AA7075 compared to 100 % recycled aluminium chip AA7075. Based on investigation to aluminium reinforced rice husk ash composites, it has good potential to improve the material behavior of metal matrix composites by appropriate composition amorphous silica to composite.

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Section: Microhardnessmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of amorphous silica by rice husk ash on physical properties and microstructures of recycled aluminium chip AA7075

Joharudin

Latif

Mustapa

et al. 2019

Materialwissenschaft Werkst

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“…12 However, conventional recycling will cause metal loss owing to oxidation and also increases the labour and energy cost. 10,13 However, only 5% of energy is required in producing the aluminium from ore needed to recycle it. 9,14 Therefore, secondary aluminium has been approved in many countries.…”

Section: Introductionmentioning

confidence: 99%

Recycling aluminium (Al 6061) chip through powder metallurgy route

Fuziana

Warikh

Lajis

et al. 2014

Materials Research Innovations

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The Al 6061 was recycled by using the powder metallurgy technique to determine the effect of particle size distribution on mechanical and microstructure of materials. Analysis of the microstructure, green density and microhardness was conducted to test the performance of recycled aluminium. The project was conducted by using Al 6061 with the addition of 4% of alumina (3-4 μm). The results showed that green density of Al 6061 was lower than pure Al 6061. As the speed of ball mill increases from 100, 150 and 200 rev min −1 , the green density increases. Next, the samples were sintered at 500, 550 and 600°C. Microstructure of 100 rev min −1 samples having the lowest green density shows larger and more frequent porosity compared to higher green density samples with smaller and less visible porosity. The sample with 200 rev min −1 ball mill speed showed the highest Vickers hardness value followed by 150 and 100 rev min −1 in the range from approximately 60-150 Hv.

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“…Further, the solid-state process can recycle composites. For example, Gronostajski et al (2001) developed a Fe-Cr-Al composite from a mixture of Al-Mg alloy chips and Fe-Cr powders via sintering (at 550 • C) and the subsequent hot extrusion (at 500-550 • C). Moreover, a bearing composite was consolidated by hot extrusion (at 500-525 • C) through mixing Al chips with such reinforcing phases as CuAl 12 Fe 4 Ni 4 and CuAl 14 Fe 4 Ni 4 powders (Gronostajski et al, 2002).…”

Section: Introductionmentioning

confidence: 99%