Brazing mechanisms of the Ti 2 AlC joints using a pure Al filler metal

Lu, Chengjie; Sun, Liangbo; Zhang, Jie; Qi, Qin; Hug, G.

doi:10.1016/j.ceramint.2017.03.113

Cited by 14 publications

(2 citation statements)

References 17 publications

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“…MAX phase compounds (M is an early transition metal, A is an A group element, X is carbon or nitrogen) with the P63/mmc space group, have attracted more attention in recent years due to the excellent combination of metallic and ceramic properties, [1][2][3][4][5] including good thermal and electrical conductivity, low coefficient of thermal expansion and superior machinability. To date, more than 150 kinds of MAX phases have been discovered, [6,7] most of which belong to 211, 312 and 413 phase.…”

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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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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“…The filler foil is well known with its properties that owns excellent chemical homogeneity, wettability and good flexibility [12]. The brazing holding time needs to take into account because it may reinforce the filler interaction [13] in joining porous metal foam. During the brazing process, the kinetics of filler diffusion and the interaction of the filler depends on the brazing holding time to form the joint interface.…”

Section: Introductionmentioning

confidence: 99%

Interfacial microstructure and strength of brazed copper/porous copper foam towards the effect of porous copper foam pore density and brazing holding time

Zahri

Shafee

Yusof

et al. 2021

Materialwissenschaft Werkst

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The porous copper foam was sandwiched between two coppers plate and then brazed using copper‐tin (9.7 %)‐nickel (5.7 %)‐phosphorus (7 %) filler foil. Brazing process was conducted to joint copper/porous copper foam by evaluating the effect of porous copper foam pore densities [pore per inch (PPI)] and brazing holding times. The brazed joint interface of copper and porous copper foam was characterised using Field emission scanning electron microscopy and Energy‐dispersive x‐ray spectroscopy for the microstructure and elemental composition analysis, respectively. X‐ray diffraction analysis was carried out on the shear fractured surfaces of brazed copper and porous copper foam for phase determination. The results exhibited distinct phases of copper (Cu), copper phosphide (Cu3P), nickel phosphide (Ni3P), and copper compound with tin (6 : 5) (Cu6Sn5). The filler layer was formed as an island‐shaped that consists of copper phosphide and nickel phosphide. Prolong brazing holding time causes a thinner filler layer in brazing seam. While the non‐uniform thickness of the filler layer was observed at different pore densities of porous copper foam. The shear strength of brazed copper/porous copper foam 15 PPI with a 10 min brazing holding time yield a maximum shear strength of 2.9 MPa.

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Substitution behavior of Si atoms in the Ti2AlC ceramics

Piven

et al. 2018

Acta Materialia

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Brazing mechanisms of the Ti 2 AlC joints using a pure Al filler metal

Cited by 14 publications

References 17 publications

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

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

Interfacial microstructure and strength of brazed copper/porous copper foam towards the effect of porous copper foam pore density and brazing holding time

Substitution behavior of Si atoms in the Ti2AlC ceramics

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