Zirconia ceramic and Nb joints brazed with Mo-particle-reinforced Ag-Cu-Ti composite fillers: Interfacial microstructure and formation mechanism

Wang, N.; Wang, D.P.; Yang, Zhenwen; Wang, Y.; Liu, X.G.

doi:10.1016/j.ceramint.2017.04.133

Cited by 43 publications

(8 citation statements)

References 32 publications

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“…Moreover, besides the reactions between filler and the base materials, the interfacial bonding between ZrO 2 and Ag–28Cu–2Ti filler also needs to be discussed. According to the research work from Wang et al., 51,52 the reaction zone between ZrO 2 and Ag–28Cu–2Ti filler consists of two continuous reaction layers. And the following two reactions are considered to be the formation mechanism of reaction layers:

\begin{equation}{{\mathop{\rm ZrO}\nolimits} _2} + {\mathop{\rm Ti}\nolimits} \to {{\mathop{\rm ZrO}\nolimits} _{2 - x}} + {\mathop{\rm TiO}\nolimits} \end{equation}

\begin{equation}2{\mathop{\rm Ti}\nolimits} + 3{\mathop{\rm Cu}\nolimits} + {\mathop{\rm TiO}\nolimits} \to {{\mathop{\rm Ti}\nolimits} _3}{{\mathop{\rm Cu}\nolimits} _3}{\mathop{\rm O}\nolimits} \end{equation}

…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, besides the reactions between filler and the base materials, the interfacial bonding between ZrO 2 and Ag-28Cu-2Ti filler also needs to be discussed. According to the research work from Wang et al, 51,52 the reaction zone between ZrO 2 and Ag-28Cu-2Ti filler consists of two continuous reaction layers. And the following two reactions are considered to be the formation mechanism of reaction layers:…”

Section: F I G U R Ementioning

confidence: 99%

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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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\begin{equation}{{\mathop{\rm ZrO}\nolimits} _2} + {\mathop{\rm Ti}\nolimits} \to {{\mathop{\rm ZrO}\nolimits} _{2 - x}} + {\mathop{\rm TiO}\nolimits} \end{equation}

\begin{equation}2{\mathop{\rm Ti}\nolimits} + 3{\mathop{\rm Cu}\nolimits} + {\mathop{\rm TiO}\nolimits} \to {{\mathop{\rm Ti}\nolimits} _3}{{\mathop{\rm Cu}\nolimits} _3}{\mathop{\rm O}\nolimits} \end{equation}

…”

Section: Resultsmentioning

confidence: 99%

Section: F I G U R Ementioning

confidence: 99%

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

et al. 2022

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“…Therefore, C/C is usually combined with metals that possess great processability in practical engineering applications. Due to its good thermal performance, Nb is a metal material typically applied in the aerospace industry for heat‐resistant parts . Therefore, the reliable bonding of C/C and Nb has significant research value.…”

Section: Introductionmentioning

confidence: 99%

Improving the Bonding Strength of Nb–C/C Composite Brazed Structures by Preoxidation

et al. 2020

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Preoxidation treatment is used to modify the surface of C/C composite. An annular column gap is formed encasing the carbon fiber, which promotes the infiltration of C/C composite by liquid brazing alloy during brazing. Based on the optimized preoxidation condition of 800 C/5 min, the effects of brazing temperature (860-940 C) and holding time (5-20 min) on the microstructure and mechanical properties of Nb and C/C joints brazed with an AgCuTi alloy are systematically investigated. The shear strength of the brazed structure at 880 C for 10 min reaches a maximum of 57 MPa, which is increased by 28 MPa compared with that of the structure without preoxidation. The infiltration depth, reaction layer thickness, Ti-Cu compound amount, and brazing seam width are characterized to reveal the synergistic effect of preoxidation and brazing parameters on the bonding strength of structures. The selection of an appropriate brazing parameter is conducive to maximizing the positive effects of preoxidation.

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“…Therefore, the ZrO 2 ceramics are always required to be joined with other ceramic or metal materials. The joining processes which can be applied to join ZrO 2 include diffusion bonding, brazing and transient liquid phase bonding . The brazing process is always adopted for its flexibility and convenience .…”

Section: Introductionmentioning

confidence: 99%

Study on the interfacial properties of active Ti element/ZrO₂ by using first principle calculation

Guo

Xue

Wei

et al. 2019

Int J Applied Ceramic Tech

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Ti element is an important active element in brazing Zirconia ceramic (ZrO 2 ) ceramic. Therefore, the interface bonding mechanism of Ti and ZrO 2 was studied by using first principles calculation. Two kinds of interfaces with different termination and stacking sequence were established, and the interfacial bonding mechanism was studied using work of adhesion (W ad ), electronic behavior and interface energy. The results show that in the O-terminated interface, Ti and O form a strong ion-covalent bond at the interface, and the W ad can reach 13.61 J/m 2 . In the Zr-terminated interface, Ti and Zr form a metal-covalent bond, and the W ad is 5.56 J/m 2 . At a temperature of 1123K, when the lnP O2 is larger than e −17 , the O-rich interface is more stable in thermodynamics. Therefore, under the experimental condition, the interface tends to form Ti-O compounds when ZrO 2 is brazed using Ag(Ti) filler metal. K E Y W O R D Selectron behavior, first principle calculation, interface bonding mechanism, work of adhesion, ZrO 2 /Ti

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Zirconia ceramic and Nb joints brazed with Mo-particle-reinforced Ag-Cu-Ti composite fillers: Interfacial microstructure and formation mechanism

Cited by 43 publications

References 32 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

Improving the Bonding Strength of Nb–C/C Composite Brazed Structures by Preoxidation

Study on the interfacial properties of active Ti element/ZrO₂ by using first principle calculation

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Zirconia ceramic and Nb joints brazed with Mo-particle-reinforced Ag-Cu-Ti composite fillers: Interfacial microstructure and formation mechanism

Cited by 43 publications

References 32 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

Improving the Bonding Strength of Nb–C/C Composite Brazed Structures by Preoxidation

Study on the interfacial properties of active Ti element/ZrO2 by using first principle calculation

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Product

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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

Study on the interfacial properties of active Ti element/ZrO₂ by using first principle calculation