Low temperature synthesis of high-purity Ti3SiC2 via additional Si through spark plasma sintering

Pourebrahim, Alireza; Baharvandi, Hamid Reza; Foratirad, Hamze; Ehsani, N.

doi:10.1016/j.jallcom.2019.03.062

Cited by 25 publications

(7 citation statements)

References 57 publications

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“…This value is somewhat higher as compared to the intrinsic hardness of Ti 3 SiC 2 reported to be about 4 GPa [12]. The higher hardness as compared to monolithic phase Ti 3 SiC 2 may be associated to the finer microstructure introduced by SPS [61] as well as the presence of TiC ancillary in the synthesized sample. Optical micrographs (Fig.…”

Section: Vickers-induced Deformation Microstructurementioning

confidence: 69%

“…This proposed loss of Si by deintercalation even at sintering temperature below the melting point of silicon (T m = 1414℃) contributes significantly to the loss of purity in the synthesized sample during the SPS. Investigators have often compensated for the loss of Si during vacuum sintering by silicon over-stoichiometry [47,[61][62][63] (that is, deviation from 3:1:2 stoichiometric ratio for Ti:Si:C) in the starting mixtures to increase the conversion into Ti 3 SiC 2 . Another method involves the systematic addition of a small amount Al in the starting powder mixture [64][65][66].…”

Section: Pore Formation In Ti 3 Sicmentioning

confidence: 99%

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Synthesis and microstructural evolution in ternary metalloceramic Ti3SiC2 consolidated via the Maxthal 312 powder route

Magnus

Galvin²,

et al. 2020

Ceramics International

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Bulk specimen containing Ti 3 SiC 2 , TiSi 2 and TiC was prepared through an in situ spark plasma sintering/solid-liquid reaction powder metallurgy method using the Maxthal 312 (nominally-Ti 3 SiC 2 ) powder as starting material. The reaction mechanism, phase constituents and evolution of microstructure were systematically investigated by X-ray diffraction (XRD), optical microscopy, scanning electron microscopy (SEM) equipped with energy dispersive spectroscopy (EDS) system, transmission electron microscopy (TEM), Raman spectroscopy, differential scanning calorimetry (DSC) and Vickers microhardness testing. Phase analysis and microstructural characterization revealed that the bulk sample contained binary ancillary phases possibly due to incomplete reaction and/or Si evaporation. The deformed microstructure around the indents revealed evidence of plasticity, intrinsic lubricity and toughening. The Microstructural and orientation relationships between the phases contained in the bulk sample are reported.

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Section: Vickers-induced Deformation Microstructurementioning

confidence: 69%

Section: Pore Formation In Ti 3 Sicmentioning

confidence: 99%

Synthesis and microstructural evolution in ternary metalloceramic Ti3SiC2 consolidated via the Maxthal 312 powder route

Magnus

Galvin²,

et al. 2020

Ceramics International

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“…Molten Al could remove oxygen, fill gaps and provide a bridging effect among the reacting powder particles, all of which could promote the diffusion reaction 13 . As a result, TiC as an impurity will decrease obviously when suitable contents of Al are introduced into in-suit synthesis [13,14] .…”

Section: Introductionmentioning

confidence: 99%

Microstructures and mechanical properties of Ti3SiC2/Al2O3 and Ti3SiC2-TiC/Al2O3 composite ceramics by modifying Al2O3 content via in-situ synthesized

Wei¹,

Ji²,

Yang³

et al. 2022

ES Mater. Manuf.

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Ti3SiC2/Al2O3 and Ti3SiC2-TiC/Al2O3 composite ceramics with various Al2O3 fractions were prepared by Ti, Si, Al, TiC and Al2O3 powers via in-situ reaction. Al2O3 contents in raw materials could influence the reaction process of Ti3SiC2 generated. It would lead to reacting completely when the Al2O3 contents is in the range of 50 to 70 vol%, otherwise, TiC as an impurity would be found. Finally, the Ti3SiC2/Al2O3 composites with 54.4 wt% Ti3SiC2, and Ti3SiC2-TiC/Al2O3 composites with 54.7 wt% Ti3SiC2 and 9.2 wt% TiC were fabricated successfully. There were two types of TiC that existed in composites, called intragranular and intergranular particles. The Ti3SiC2-TiC/Al2O3 composite ceramics with 9.2 wt% TiC showed higher mechanical properties than the Ti3SiC2/Al2O3 composite. From the analysis of microcrack propagation paths, the dispersed TiC particles as reinforcement agents would cause significant crack deflection, improving the flexural strength and fracture toughness up to 492 MPa and 7.8 MPa.m 1/2 respectively.

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“…Ti3SiC2 is a part of the large family of ternary laminate compounds, with various synthesis methods such as pressureless, [8] microwave sintering, [9] hot pressing (HP) [10][11][12][13] and spark plasma sintering (SPS). [14][15][16][17][18] Sintering temperatures is a significant parameter in in-situ synthesis process, excessive temperature would cause decomposition of Ti3SiC2 as well as generate TiC as an impurity. The sintering temperatures and contents (also mechanical properties if they are available) of Ti3SiC2 synthesized via different sintering methods are summarized in Table 1.…”

Section: Introductionmentioning

confidence: 99%

First-principle Study and Experiment on Temperature-dependent Substitution Process of Si in Ti3(Si,Al)C2 Solid Solution

Ji¹,

Zhang²,

Zhang³

et al. 2021

ES Mater. Manuf.

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High-pure Ti3(Si,Al)C2 solid solutions were synthesized by using Ti, Si, Al and TiC powders in the range of 1473K to 1773 K. The microstructures and chemical compositions of all samples were characterized by X-rays diffraction (XRD) and scanning electron microscope (SEM). Microstructural analysis and mechanical properties test demonstrated that the Ti3(Si,Al)C2 solid solutions exhibited highest relative density and mechanical properties when synthesized at 1773 K. In addition, it was worthy noted that experimentally determined lattice parameter c of Ti3(Si,Al)C2 crystal decreased with the increasing of sintering temperature. The contents of Si and Al elements in solid solution were conducted by Vegard's Law. Gibbs energy differences (△G) of substitution process of Si (Si replace Al atoms) in Ti3(Si,Al)C2 solid solutions at different temperatures were also listed. With the increase of temperature, the △G value was negative and decreased gradually, which means that the transformation from Ti3(SipoorAlrich)C2 to Ti3(SirichAlpoor)C2 was spontaneous and had a greater tendency in higher temperatures. By combined the experimental and calculational data, a possible mechanism of this transformation was determined.

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Low temperature synthesis of high-purity Ti3SiC2 via additional Si through spark plasma sintering

Cited by 25 publications

References 57 publications

Synthesis and microstructural evolution in ternary metalloceramic Ti3SiC2 consolidated via the Maxthal 312 powder route

Synthesis and microstructural evolution in ternary metalloceramic Ti3SiC2 consolidated via the Maxthal 312 powder route

Microstructures and mechanical properties of Ti3SiC2/Al2O3 and Ti3SiC2-TiC/Al2O3 composite ceramics by modifying Al2O3 content via in-situ synthesized

First-principle Study and Experiment on Temperature-dependent Substitution Process of Si in Ti3(Si,Al)C2 Solid Solution

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