Investigation on microstructure and mechanical behavior of Al–ZrB2 composite prepared by microwave and spark plasma sintering

Ghasali, Ehsan; Pakseresht, Amirhossein; Safari-kooshali, Fatemeh; Agheli, Maryam; Ebadzadeh, Touradj

doi:10.1016/j.msea.2014.12.096

Cited by 79 publications

(24 citation statements)

References 16 publications

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“…Consequently, it seems that the decrease of density at temperature of 750° for D and 850°C for A and C composites can be attributed to the formation and decomposition of some components in these composites. The maximum density (2.89 g/cm 3 ) was achieved when 20 wt.% zircon and 2 wt.% cobalt were used in aluminum matrix sintered at 750˚C. Figure 1 shows the low amount of porosity in all aluminum composites reinforced with zircon and similar results were found by Chen et al 24 .…”

Section: Sintering Conditionsupporting

confidence: 76%

“…Microwave heating led to the decomposition of zircon reinforcements and formation of intermetallic compounds. Density and mechanical strength of composites sintered in microwave (2.86 g/cm 3 and 266 MPa, respectively) were remarkably higher than those of composites sintered in conventional furnace (2.60 g/cm 3 and 156 MPa, respectively). The microstructure of composites showed a good dispersion of the second phase particles containing an intermetallic phase in aluminum matrix.…”

Section: Discussionmentioning

confidence: 80%

“…Particle reinforced aluminum matrix composites have received considerable attention in aerospace and automobile industries because of high specific modulus, good wear resistance and high specific strength [1][2][3] . Aluminum matrix composites have been usually produced via powder metallurgy and casting, while achieving a homogenous distribution of reinforcement in the base alloy is more accessible with powder metallurgy in comparison with casting technique [4][5][6] .…”

Section: Introductionmentioning

confidence: 99%

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Effect of Heating Method on Microstructure and Mechanical Properties of Zircon Reinforced Aluminum Composites

et al. 2016

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The mechanical properties and microstructure of aluminum matrix composites containing of zircon (10, 15 and 20 wt.%) as a reinforcement particles and cobalt additive (1, 1.5 and 2 wt.%) were investigated. The aluminum matrix composites were prepared by powder metallurgy technique and sintered in both conventional and microwave furnaces at temperatures higher than the melting point of aluminum. The results revealed that the density and mechanical strength of aluminum were increased by introducing zircon and cobalt particles. The maximum strength was obtained by adding 10 wt.% zircon sintered in microwave furnace at 950°C. The phase analysis and scanning electron microscopy of sintered composites were examined and found some interesting data about intermetallic compounds.

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Section: Sintering Conditionsupporting

confidence: 76%

Section: Discussionmentioning

confidence: 80%

Section: Introductionmentioning

confidence: 99%

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Effect of Heating Method on Microstructure and Mechanical Properties of Zircon Reinforced Aluminum Composites

et al. 2016

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“…As reported 6 , SPS introduces two important factors in a process of sintering; first is the production of sparks between particles and second is the application of pressure during sintering process. The advantages of SPS method such as rapid heating, surface cleaning of powders, etc, make this process one of the most successful sintering method to obtain fully dense materials [7][8][9][10] . In the present work, the spark plasma sintering technique has been used to produce Al-Zircon composites at a lower sintering temperature compared with conventional method.…”

Section: Introductionmentioning

confidence: 99%

Low Temperature Sintering of Aluminum-Zircon Metal Matrix Composite Prepared by Spark Plasma Sintering

et al. 2016

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Aluminum-15 wt. % zircon metal matrix composite was fabricated using spark plasma sintering method at the temperature of 450°C and holding time of 4 min. The bending strength of 284±21 MPa and microhardness of 171±14 Vickers were determined for produced composite. XRD investigations proved that almost no decomposition of zircon particles as reinforcement occurred. SEM studies revealed the homogenous dispersion of reinforcement particles in the aluminum matrix.

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“…Therefore, this class of materials has received much attention to explore for wide applications in many structures and components by synthesis of metal-ceramic composites and by means of joining to metals or other ceramics. Recently, attempts have been done to produce AlZrB 2 metal matrix composites by different techniques, among which liquid-assisted ones are the most promising (Ref 3,4). Thus, a comprehensive knowledge concerning wetting behavior and reactivity in the Al/ZrB 2 system is of great practical importance.…”

Section: Introductionmentioning

confidence: 99%

Wettability and Reactivity of ZrB2 Substrates with Liquid Al

Nowak¹,

Sobczak

Bruzda³

et al. 2016

J. of Materi Eng and Perform

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Wetting characteristics of the Al/ZrB 2 system were experimentally determined by the sessile drop method with application of separate heating of the ZrB 2 and Al samples and combined with in situ cleaning of Al drop from native oxide film directly in vacuum chamber. The tests were performed in ultrahigh vacuum of 10 26 mbar at temperatures 710, 800, and 900°C as well as in flowing inert gas (Ar) atmosphere at 1400°C. The results evidenced that liquid Al does not wet ZrB 2 substrate at 710 and 800°C, forming high contact angles (h) of 128°and 120°, respectively. At 900°C, wetting phenomenon (h < 90°) occurs in 29th minute and the contact angle decreases monotonically to the final value of 80°. At 1400°C, wetting takes place immediately after drop deposition with a fast decrease in the contact angle to 76°. The solidified Al/ZrB 2 couples were studied by scanning and transmission electron microscopy coupled with x-ray energy diffraction spectroscopy. Structural characterization revealed that only in the Al/ZrB 2 couple produced at the highest temperature of 1400°C new phases (Al 3 Zr, AlB 2 and a-Al 2 O 3 ) were formed.

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Investigation on microstructure and mechanical behavior of Al–ZrB2 composite prepared by microwave and spark plasma sintering

Cited by 79 publications

References 16 publications

Effect of Heating Method on Microstructure and Mechanical Properties of Zircon Reinforced Aluminum Composites

Effect of Heating Method on Microstructure and Mechanical Properties of Zircon Reinforced Aluminum Composites

Low Temperature Sintering of Aluminum-Zircon Metal Matrix Composite Prepared by Spark Plasma Sintering

Wettability and Reactivity of ZrB2 Substrates with Liquid Al

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