Influences of carbon additions on reaction mechanisms and tensile properties of Al-based composites synthesized in-situ by Al–SiO2 powder system

Zhu, Heguo; Guo, Guanhong; Cui, Tao; Huang, Jingjing; Li, Jianliang; Xie, Zonghan

doi:10.1016/j.msea.2014.11.043

Cited by 14 publications

(4 citation statements)

References 17 publications

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“…The XRD diffraction pattern of the specimen prepared from heating up to 1300 K (Fig. 1b) shows the diffraction peaks of Ni and SiC 27,28 . The SEM image (Fig.…”

Section: Resultsmentioning

confidence: 99%

Effect of Si and C additions on the reaction mechanism and mechanical properties of FeCrNiCu high entropy alloy

Huang

Qiu

et al. 2019

Sci Rep

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FeCrNiCu based high entropy alloy matrix composites were fabricated with addition of Si and C by vacuum electromagnetic induction melting. The primary goal of this research was to analyze the reaction mechanism, microstructure, mechanical properties at room temperature and strengthening mechanism of the composites with addition of Si and C. The reaction mechanism of powders containing (Si, Ni and C) was analyzed, only one reaction occurred (i.e., Si + C → SiC) and its activation energy is 1302.8 kJ/mol. The new composites consist of a face centered cubic (FCC) structured matrix reinforced by submicron sized SiC particles. The addition of Si and C enhances the hardness from 351.4 HV to 626.4 HV and the tensile strength from 565.5 MPa to 846.0 MPa, accompanied by a slight decrease in the plasticity. The main strengthening mechanisms of SiC/FeCrNiCu composites were discussed based on dislocation strengthening, load bearing effect, Orowan mechanism and solid solution hardening, whose contributions to the tensile strength increase are 58.6%, 6.3%, 14.3% and 20.8%, respectively.

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“…The XRD diffraction pattern of the specimen prepared from heating up to 1300 K (Fig. 1b) shows the diffraction peaks of Ni and SiC 27,28 . The SEM image (Fig.…”

Section: Resultsmentioning

confidence: 99%

Effect of Si and C additions on the reaction mechanism and mechanical properties of FeCrNiCu high entropy alloy

Huang

Qiu

et al. 2019

Sci Rep

Self Cite

View full text Add to dashboard Cite

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“…On the other hand, research has indicated that addition of carbon increased the apparent activation energy of the in situ reaction. The carbon in the vicinity of the reactant particles reduces the contact between reactants to hinder the reaction [23]. The substance migration and diffusion between solid-phase particles require a longer sintering time with the presence of carbon.…”

Section: Methodsmentioning

confidence: 99%

Microstructure and Mechanical Properties of Multiphase Strengthened Al/Si/Al₂O₃/SiO₂/MWCNTs Nanocomposites Sintered by In Situ Vacuum Hot Pressing

Jiang

Shao

et al. 2015

Journal of Nanomaterials

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Eutectic Al–Si binary alloy is technically one of the most important Al casting alloys due to its high corrosion resistance, evident shrinkage reduction, low thermal expansion coefficient, high fluidity, and good weldability. In this work, multiphased Al–Si matrix nanocomposites reinforced with Al2O3and multiwalled carbon nanotubes (MWCNTs) have been sintered by anin situvacuum hot-pressing method. The alumina Al2O3nanoparticles were introduced by anin situreaction of Al with SiO2. Microstructure and mechanical properties of the sintered Al/Si/Al2O3/SiO2/MWCNTs nanocomposites with different alumina contents were investigated. The mechanical properties were determined by micro-Vickers hardness and compressive and shear strength tests. The results demonstrated thatin situalumina and MWCNTs had impacts on microstructure and mechanical properties of the nanocomposites. Based on the mechanical properties and microstructure of the nanocomposites, strengthening and fracture mechanisms by multiple reinforcements were analyzed.

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“…Since the silicon in the SGHDI method is obtained by the reaction of 4Al + 3SiO 2 = 2Al 2 O 3 + 3Si, the variation of the silicon concentration gradient can be controlled by changing the Al‐SiO 2 reaction rate. In another study, Zhu et al [ 23 ] showed that the addition of carbon could impede the reaction between the Al‐SiO 2 compound. Consequently, the aim of the present work is to establish the possibility that the addition of carbon into the Al‐SiO 2 system can change the microstructure of Ti–Al–Si coatings synthesized by the SGHDI method.…”

Section: Introductionmentioning

confidence: 99%

Effects of carbon addition on Ti–Al–Si coatings synthesized by self‐generated gradient hot‐dipping infiltration method

Shi

Zhu

et al. 2023

Materials & Corrosion

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The effects of carbon addition on the microstructure and oxidation resistance of Ti–Al–Si coatings synthesized by the self‐generated gradient hot‐dipping infiltration method were studied. The microstructure, phase structure, as well as composition of the coating, were observed by using X‐ray diffraction, scanning electron microscope, and energy dispersive spectrometer. It was found that when carbon was added into the Al‐SiO2 system, the coating was composed of L‐(Al,Si) phase and Ti(Al,Si)3 phase. The thickness of the Ti(Al,Si)3 phase layer increased along with the dipping time. The cycle oxidation tests at 900°C for 160 h showed that the weight gains of the coating samples were only 8.1% of that of the Ti–6Al–4V alloy samples. This result indicates that the coatings remarkably enhanced the oxidation resistance of Ti–6Al–4V alloy, which could be ascribed to two reasons: (1) the mixed oxidation zone of Al2O3, Ti(Al,Si)3, and Ti5Si3 on top of the oxidized coating could act as a barrier to retard the diffusion of oxygen to the substrate; and (2) several new phase layers (Ti3Al, TiAl, and Ti5Si3 + TiAl2) near the substrate during oxidation could reduce the cracks at the bottom of the oxidized coating.

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Influences of carbon additions on reaction mechanisms and tensile properties of Al-based composites synthesized in-situ by Al–SiO2 powder system

Cited by 14 publications

References 17 publications

Effect of Si and C additions on the reaction mechanism and mechanical properties of FeCrNiCu high entropy alloy

Effect of Si and C additions on the reaction mechanism and mechanical properties of FeCrNiCu high entropy alloy

Microstructure and Mechanical Properties of Multiphase Strengthened Al/Si/Al₂O₃/SiO₂/MWCNTs Nanocomposites Sintered by In Situ Vacuum Hot Pressing

Effects of carbon addition on Ti–Al–Si coatings synthesized by self‐generated gradient hot‐dipping infiltration method

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Influences of carbon additions on reaction mechanisms and tensile properties of Al-based composites synthesized in-situ by Al–SiO2 powder system

Cited by 14 publications

References 17 publications

Effect of Si and C additions on the reaction mechanism and mechanical properties of FeCrNiCu high entropy alloy

Effect of Si and C additions on the reaction mechanism and mechanical properties of FeCrNiCu high entropy alloy

Microstructure and Mechanical Properties of Multiphase Strengthened Al/Si/Al2O3/SiO2/MWCNTs Nanocomposites Sintered by In Situ Vacuum Hot Pressing

Effects of carbon addition on Ti–Al–Si coatings synthesized by self‐generated gradient hot‐dipping infiltration method

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Microstructure and Mechanical Properties of Multiphase Strengthened Al/Si/Al₂O₃/SiO₂/MWCNTs Nanocomposites Sintered by In Situ Vacuum Hot Pressing