Synthesis-microstructure-mechanical properties-wear and corrosion behavior of an Al-Si (12%)—Flyash metal matrix composite

Ramachandra, M.; Radhakrishna, K.

doi:10.1007/s10853-005-1303-6

Cited by 111 publications

(69 citation statements)

References 7 publications

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“…The main disadvantage is the non-uniform distribution of the particles (due to density mismatch between matrix and filler material). Ramachandra and Radhakrishna successfully produced syntactic foams by blending method and described the process parameters [2]. Pressure infiltration is used when high volume fraction and uniform distribution of the reinforcing particles or fibres are desired in MMCs.…”

Section: Introductionmentioning

confidence: 99%

Producing metal matrix syntactic foams by pressure infiltration

Orbulov¹,

Dobránszky

2008

Per. Pol. Mech. Eng.

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This paper presents the possibility of syntactic foam production by pressure infiltration technology. Syntactic foams have low density and relatively high strength. Therefore they can be the material of many important parts in automotive technology or in aviation. The parameters of infiltration were studied and physical and mechanical investigations were performed. Microscopic investigations showed almost perfect infiltration at the applied infiltration pressure. The densities of the foams were significantly decreased. Low density ensures good specific properties and economical energy consuming in the case of moving the parts. Syntactic foams showed a plateau region in their upsetting diagrams and absorbed a high energy during upsetting. The effect of aspect ratio was also investigated. Specimens with higher aspect ratios showed lower peak stress, lower plateau level and higher modulus of elasticity.Keywords metal matrix composite · pressure infiltration · metallic foam · syntactic foam · ceramic microballoon · hollow sphere.

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Section: Introductionmentioning

confidence: 99%

Producing metal matrix syntactic foams by pressure infiltration

Orbulov¹,

Dobránszky

2008

Per. Pol. Mech. Eng.

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“…Besides that, most published studies also used and investigated various processing techniques in the production of syntactic foams [24][25][26][27][28][29][30]. Some of the literatures described the technique in detail [31,32] and some patented their manufacturing techniques such done by Kim [33] and Meteer and Philipps [34]. Usually, syntactic foams where made by casting [24], pressure infiltration or by a blending method [26].…”

Section: Introductionmentioning

confidence: 99%

Development and characterization of epoxy syntactic foam filled with epoxy hollow spheres

Samsudin¹,

Ariff²,

Zakaria³

et al. 2011

Express Polym. Lett.

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Abstract. The present study focuses on the development and characterization of epoxy syntactic foam filled with epoxy hollow spheres (ESF/EHoS). The epoxy syntactic foam (ESF) was produced by embedding epoxy hollow spheres (EHoS) into a mixture of epoxy-hardener and 3% KOH solution. An innovative approach and simple procedure was implemented in the preparation of the EHoS where expanded polystyrene (EPS) beads were used as initiation material. The EPS beads were coated with the epoxy resin and these coated EPS beads were later cured and post-cured at high temperature which will also shrink the EPS beads thus producing a hollow structure. The physical and compressive properties of the developed ESF were characterized. The progressive collapse of the syntactic foam was monitored in real-time with respect to percentage of strain during a compression test. Results also indicated that the (ESF/EHoS) showed similar deformation pattern with other types of syntactic foams which exhibited the common three regions of deformations.

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“…Therefore the investigation of the microstructure and the quality of the microspheres is very important [9]. Besides the compressive strength other mechanical properties, such as the tensile strength, or the hardness of the syntactic foams were investigated [12,13]. The sliding behavior of the syntactic foams was also examined because the ceramic microspheres have large hardness and therefore the composite shows better wear behavior, than the pure matrix [14,15].…”

Section: Introductionmentioning

confidence: 99%

On the microstructure of ceramic hollow microspheres

Orbulov

Májlinger

2010

Per. Pol. Mech. Eng.

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Metal matrix syntactic foams (MMSFs) IntroductionNowadays metallic foams become more and more important and this is confirmed by the increasing number of papers published on this topic.The "conventional" metallic foams, which contain metallic and gas phase only, have widespread literature. However there are still existing problems for example in accordance with the foaming process of the foams [1, 2]. The metallic foams have a special class which satisfies the definition of particle reinforced metal matrix composites also. These are the metal matrix syntactic foams (MMSFs). The first of them was produced in the '90s. The MMSFs have numerous perspective applications as covers, hulls, castings, or in automotive and electromechanical industry sectors because of their high energy absorbing and damping capability. In these porous materials the porosity is ensured by incorporating ceramic hollow microspheres [3]. The microspheres are commercially available and they contain mainly various oxide ceramics [4, 5]. The quality of the microspheres has a strong effect on the mechanical and other properties of the foams. The behavior of the foams has been widely studied.The most important properties of the foams are the compressive strength and the absorbed energy. Wu et al examined the effects of the microballoon size on the compressive strength. They found that smaller microspheres ensure higher compressive strength because they contain fewer flaws in their microstructure, than the larger ones. The damage propagation of the foams was also investigated. The fracture was initialized in the corners of the specimens by the shearing of the microspheres [6]. Rohatgi et al also investigated the size effect of the microspheres, but not only in the view of compressive strength, but in the view of infiltration too. Their measurements showed that the larger microspheres can be infiltrated easier [7]. Palmer et al proved that the larger microspheres contain more porosity in their wall and more flaws in their microstructure, than the smaller ones [8]. The results of the performed upsetting tests were compared to other works on this topic. The conclusions were the same [9,10]. Balch et al performed a special upsetting test. The loading was applied in small steps and after each test X-ray or neutron diffraction measurements were carried out.

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Synthesis-microstructure-mechanical properties-wear and corrosion behavior of an Al-Si (12%)—Flyash metal matrix composite

Cited by 111 publications

References 7 publications

Producing metal matrix syntactic foams by pressure infiltration

Producing metal matrix syntactic foams by pressure infiltration

Development and characterization of epoxy syntactic foam filled with epoxy hollow spheres

On the microstructure of ceramic hollow microspheres

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