Improvement for Interfacial Microstructure and Mechanical Properties of Ti3SiC2/Cu Joint Brazed by Ag-Cu-Ti Filler with Copper Mesh

Chen, Haiyan; Nai, Xin; Zhao, Shuai; Lu, Decai; Shen, Zhonglin; Li, Wenya; Cao, Jian

doi:10.3390/cryst11040401

Cited by 11 publications

(5 citation statements)

References 46 publications

(47 reference statements)

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“…These defects include inherent non‐dense area or even pores of sintered materials as well as microcracks formed during the brazing. Moreover, according to our previous research, 44 a large number of intermetallic compounds with poor plasticity such as Ti 5 Si 3 , TiC, Ti 2 Cu, and Ti 3 Cu are formed at the interface of joints.…”

Section: Resultsmentioning

confidence: 92%

Improvement for Ti₃SiC₂/Cu joint brazed using composite fillers with abnormal expansion ceramic particulates

et al. 2022

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Reducing the residual stresses and improving the mechanical strength of largescale ceramic/metal brazing joints is an important problem that must be solved for its practical engineering application. Using composite filler with solid-state phase transformation ceramic particulates, it is theoretically feasible to relieve the residual stress and improve the mechanical properties of ceramic/metal brazed joints. In this study, Cu mesh, Ag-28Cu-2Ti (wt.%), and yttria-stabilized zirconia (0.6 mol.% YSZ solid-state phase transformation ceramic particulates) composite power fillers were used in the brazing of Ti 3 SiC 2 ceramic and pure copper. The microstructure of joints and YSZ particulates in the interface was investigated and confirmed by scanning electron microscopy (SEM), energydispersive X-ray spectroscopy (EDS), scanning transmission electron microscopy (STEM), and transmission electron microscopy (TEM). In addition, the effect of YSZ particulates content on the mechanical properties of joints was investigated and evaluated by the shear strength. The results show that the interfacial phases were mainly Ti 5 Si 3 , TiC, Ti x Cu, Ag (s, s), Cu (s, s), and YSZ particulates. Moreover, most of YSZ particulates undergo the solid-state phase transformation from tetragonal zirconia (t-ZrO 2 ) to monoclinic zirconia (m-ZrO 2 ) during the cooling process of brazing. The abnormal volume expansion of the solid-state phase transformation reduced the thermal mismatch between Ti 3 SiC 2 ceramic and filler, thereby reducing the residual stress in the interface of joint. When using composite filler with 6 wt.% YSZ particulates, the shear strength of Ti 3 SiC 2 /Cu joint reached the maximum. The maximum average shear strength of the joints was 80.2 MPa, which was about 103.6% more than the joint without YSZ particulates.

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Section: Resultsmentioning

confidence: 92%

Improvement for Ti₃SiC₂/Cu joint brazed using composite fillers with abnormal expansion ceramic particulates

et al. 2022

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“…They were developed to meet the requirement of modern electrically conductive materials 7,13–17 . So far, Ti 3 SiC 2 /Cu composites have a wide range of applications in electrical contact materials, especially in brazed joints 18,19 . However, in industrial systems, electrical contact materials were exposed to high‐temperature environments of molten salts and the deposition of salts on the substrates resulted in serious high‐temperature corrosion and material degradation 20–22 .…”

Section: Introductionmentioning

confidence: 99%

“…7,[13][14][15][16][17] So far, Ti 3 SiC 2 /Cu composites have a wide range of applications in electrical contact materials, especially in brazed joints. 18,19 However, in industrial systems, electrical contact materials were exposed to high-temperature environments of molten salts and the deposition of salts on the substrates resulted in serious high-temperature corrosion and material degradation. [20][21][22] At present, studies on the corrosion resistance of the electrical contact materials under high-temperature molten salts environments are scarce.…”

Section: Introductionmentioning

confidence: 99%

Corrosion behaviors of Ti₃SiC₂/Cu composites in molten salts

Liu,

Du,

et al. 2024

Int J Applied Ceramic Tech

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The corrosion behaviors of Ti3SiC2/Cu composites synthesized by spark plasma sintering technique were investigated at 900°C in three molten salts including NaCl, Na2SO4, and Na2CO3, and the related corrosion mechanism was discussed. The morphology and composition of the composites after corrosion were characterized by scanning electron microscopy and X‐ray photoelectron spectroscopy. The results indicated that the weight gain per unit surface area of the composites was negative in molten Na2CO3, while it was positive and relatively small in molten NaCl and Na2SO4. The high weight loss of the composites in molten Na2CO3 was owing to that in molten Na2CO3, an oxidation layer of the composites was dissolved, and oxygen diffused through the layer to corrode the substrate inside. Thus, in the molten Na2CO3, the composites exhibited a worse corrosion resistance. However, in molten NaCl and Na2SO4, an oxidation layer containing SiO2 and TiO2 was formed on the surface of the composites, inhibiting its further corrosion. Conclusively, the composites showed better corrosion resistance in molten NaCl and Na2SO4.

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“…However, similar to other ceramics, the application of ZTA ceramics would be severely limited by their intrinsic brittleness. The brazing technique is an effective method to solve this problem [6][7][8]. The joining of ZTA ceramic to itself or to metals is helpful in fabricating complex structures and devices that can be used in harsh circumstances, such as hightemperature, corrosion, and oxidation environments.…”

Section: Introductionmentioning

confidence: 99%

Wetting Behavior of the Ag-5CuO Brazing Alloy on ZTA Composite Ceramic with/without CuO Coating in Air

Gui

Liu

et al. 2021

Crystals

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The wetting of Ag-5 wt.% CuO (Ag-5CuO) alloy on initial/CuO-coated zirconia toughened alumina (ZTA) composite ceramic in air was studied in detail. The results showed that the contact angle of the Ag-5CuO/ZTA system rapidly decreased from 81° at 970 °C to 45° at 990 °C during the heating process, however, moderate reductions in contact angle were observed in the subsequent heating and temperature holding stages. In comparison with the contact angle of pure Al2O3, an increment of about 4° of the stable contact angle of Ag-5CuO alloy on the heterogeneous ZTA was observed. The reaction between Al2O3 and CuO can reduce the damage of the CuO-rich liquid to ZrO2 in the ZTA substrate. Both oxygen and CuO were helpful in reducing the contact angle of Ag on ZTA and enhancing the bonding of the Ag/ZTA interface. The continuous CuO coating on ZTA and the monotectic liquid containing more CuO in the region near the triple line induced reductions of more than 40° and about 10° in the contact angle, respectively, between the initial and the CuO coating-improved wetting systems.

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Improvement for Interfacial Microstructure and Mechanical Properties of Ti3SiC2/Cu Joint Brazed by Ag-Cu-Ti Filler with Copper Mesh

Cited by 11 publications

References 46 publications

Improvement for Ti₃SiC₂/Cu joint brazed using composite fillers with abnormal expansion ceramic particulates

Improvement for Ti₃SiC₂/Cu joint brazed using composite fillers with abnormal expansion ceramic particulates

Corrosion behaviors of Ti₃SiC₂/Cu composites in molten salts

Wetting Behavior of the Ag-5CuO Brazing Alloy on ZTA Composite Ceramic with/without CuO Coating in Air

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Improvement for Interfacial Microstructure and Mechanical Properties of Ti3SiC2/Cu Joint Brazed by Ag-Cu-Ti Filler with Copper Mesh

Cited by 11 publications

References 46 publications

Improvement for Ti3SiC2/Cu joint brazed using composite fillers with abnormal expansion ceramic particulates

Improvement for Ti3SiC2/Cu joint brazed using composite fillers with abnormal expansion ceramic particulates

Corrosion behaviors of Ti3SiC2/Cu composites in molten salts

Wetting Behavior of the Ag-5CuO Brazing Alloy on ZTA Composite Ceramic with/without CuO Coating in Air

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Improvement for Ti₃SiC₂/Cu joint brazed using composite fillers with abnormal expansion ceramic particulates

Improvement for Ti₃SiC₂/Cu joint brazed using composite fillers with abnormal expansion ceramic particulates

Corrosion behaviors of Ti₃SiC₂/Cu composites in molten salts