Effect of aluminum addition on the densification behavior and mechanical properties of synthesized high-purity nano-laminated Ti3SiC2 through spark plasma sintering

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

doi:10.1016/j.jallcom.2017.10.018

Cited by 19 publications

(7 citation statements)

References 44 publications

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“…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]. The increase in purity with aluminium addition is as follows: as aluminium has a relatively low melting point (660 °C), molten Al will promote the diffusion of both Ti and Si atoms thus expediting the formation of Ti 3 SiC 2 via solid-liquid reaction at low temperature [67]; molten Al also acts as a deoxidation agent which promotes the synthesis of Ti 3 SiC 2 [65].…”

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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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: 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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“…[16][17][18] SPS is currently used to produce various high-temperature ceramic composites, such as α-Sialon/SiC, Al 2 O 3 -Ti, SiC-ZrC, TiB 2 /Fe-15Cr-8Al-20Mn, nanocrystalline ZrB 2 , and nano-laminated Ti 3 SiC 2 composites. [19][20][21][22][23][24] The yield strength and ultimate compressive strength of TiB w /TA15 composites, sintered by rapid current assisted sintering, are 1172.5 MPa and 1818.4 MPa, respectively. 25 SPS sintered composites have good mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Mechanism of improving the mechanical properties of Si₃N₄/TiC ceramic tool materials prepared by spark plasma sintering

Chen

Zhang

et al. 2023

Int J Applied Ceramic Tech

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Spark plasma sintering (SPS) is a new sintering method having shorter sintering time and higher densification speed than the traditional sintering methods. In this paper, the Si3N4/TiC ceramic tool material is sintered by SPS. The microstructure and mechanical properties of the material under different sintering parameters are compared. The sintering process of the material is then analyzed, and the best sintering parameters are obtained. Heat the material to 1600°C and keep the temperature for 15 min, then continue to heat to 1700°C and keep the temperature for 10 min, Si3N4/TiC ceramic tool material has high mechanical properties, its bending strength, fracture toughness, and Vickers hardness are 959 MPa, 8.61 MPa·m1/2, and 15.21 GPa, respectively. The scanning electron microscope (SEM) analysis shows that under this condition, the sintering additives and Si3N4/TiC material form the liquid phase, which makes the Si3N4 particles rearrange, dissolve, precipitate, and transform into rod shape β‐Si3N4. In addition, under the action of pulse current and external pressure, electric sparks are generated between TiC particles, which allows the material transfer and particle refinement. Therefore, the β‐Si3N4 has uniform grain size, and it is vertically and horizontally arranged in the structure, which makes the material have excellent mechanical properties.

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“…As Si and Al elements have similar atomic radius, Al atoms often dissolved into Ti3SiC2 crystal inevitably, generating Ti3(SixAl1-x)C2 solid solution when Al was added as sintering additive via in-situ synthesis. Some research [24][25][26][27][28][29] suggested that adding an appropriate amount of Al to initial powder mixtures can lower the sintering temperature, improve the yield and oxidation resistance of the products.…”

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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Effect of aluminum addition on the densification behavior and mechanical properties of synthesized high-purity nano-laminated Ti3SiC2 through spark plasma sintering

Cited by 19 publications

References 44 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

Mechanism of improving the mechanical properties of Si₃N₄/TiC ceramic tool materials prepared by spark plasma sintering

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

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Effect of aluminum addition on the densification behavior and mechanical properties of synthesized high-purity nano-laminated Ti3SiC2 through spark plasma sintering

Cited by 19 publications

References 44 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

Mechanism of improving the mechanical properties of Si3N4/TiC ceramic tool materials prepared by spark plasma sintering

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

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Mechanism of improving the mechanical properties of Si₃N₄/TiC ceramic tool materials prepared by spark plasma sintering