Microstructure and mechanical properties of BN-Si3N4 and AlON joints brazed with Ag-Cu-Ti filler alloy

Liu, Mingxu; Liu, C.F.; Zhang, J.; Tao, Rui; Zhang, Qiang; Qi, Qin

doi:10.1016/j.jeurceramsoc.2017.10.001

Cited by 24 publications

(3 citation statements)

References 28 publications

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“…AlON (aluminium oxynitride) is a potential ceramic material for advanced refractory applications that has good mechanical properties, oxidation resistance and thermal shock resistance at high temperatures [1][2][3]. It is widely used as engine heating parts, infrared windows, etc.…”

Section: Introductionmentioning

confidence: 99%

Oxidation resistance performance of SiC-AlON ceramic composites at high temperature

Xiao

Zhao

et al. 2022

PAC

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The microstructure and oxidation behaviour of the pure AlON ceramics and 8 wt.% SiC-AlON composite were investigated at 700-1500?C. With increasing oxidation temperature, the surface morphology of two ceramics showed a change from acicular to flaky-like and then to granular features. With the addition of nanosized SiC particles, the oxidation resistance of the ceramics was remarkably enhanced above 1100?C. This is attributed to the formation of a dense oxide layer composed of Al2O3, SiO2 and mullite, which could cover the whole matrix and suppress further penetration of oxygen. Due to the dense oxide layer, the oxidation kinetics of the 8 wt.% SiC-AlON composites conformed to a parabolic law, while that of the pure AlON conformed to a linear law. After oxidation at 1500 ?C for 40 h, the weight gain of the 8 wt.% SiC-AlON composites was 3.07mg/cm2, which was only 22.5% of that of the pure AlON.

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Section: Introductionmentioning

confidence: 99%

Oxidation resistance performance of SiC-AlON ceramic composites at high temperature

Xiao

Zhao

et al. 2022

PAC

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“…When it comes to non-precious metals, the Ti, Zr, Zn, V and Al metals have shown their potential for the use in brazing eld [11][12][13][14][15][16][17]. Among these metals, Al metal suggests possibility to be applied in the air brazing, due to its moderate melting point and the ability to form dense Al 2 O 3 layer.…”

Section: Introductionmentioning

confidence: 99%

Realizing the Air Joining of ZrO2 Ceramics Through Al Metal

Yan

Liu

et al. 2021

Preprint

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The interfacial behaviors of the filler metal and base material have always been the key issues for ceramics joining. Herein, we reveal that the Al metal prefers to spread on the ZrO2 based ceramic under the air heating condition, due to the geometric limit effects by in-situ formed dense Al2O3 surface. Inspired by this, the joining of ZrO2 based ceramics was realized in air with Al metal as filler, due to the diffusion of Al towards ceramic side. The Al element can induce obvious interfacial bonding effect towards Al2O3 layer and ZrO2 ceramic, where the hybridization among the Al-p, Zr-d and O-p orbitals plays a key role. The in-situ formed Al2O3 layer on Al filler surface is vital for forming the fine interface (shear strength of ~36 MPa), which results in the relief of lattice mismatch and peak stress at ceramic-filler metal transition interface.

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“…It is well known that the filler metals play an important role in brazing ceramics to metals. Due to the low melting point and excellent wettability and ductility [21][22][23], the AgCu based filler alloy was effective in reducing the mismatch of the coefficients of thermal expansion. Correspondingly, the residual thermal stresses were reduced.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Shear Strength of Brazing TiAl/Si3N4 Joints with Ag-Cu Binary Alloy as Filler Metal

Dong

Zhu

Wang

et al. 2018

Metals

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Vacuum brazing of TiAl intermetallic alloy to Si3N4 ceramics was performed using Ag-28Cu (wt.%) filler alloy. The brazing joints obtained at different brazing temperatures were studied in this work. The microstructure and the shear strength were analyzed in detail. The results show that the brazed joints could be divided into three regions: AlCu2Ti reaction layer near the Ti-48Al-2Cr-2Nb alloy, a typical Ag-Cu eutectic structure and a thin continuous TiN + Ti5Si3 reaction layer near the Si3N4 ceramics. The microstructure varied as the brazing temperature was increased from 1153 K/15 min to 1193 K/15 min. The shear strength of the joints first increased as the brazing temperature increased from 1153 K to 1173 K, and then decreased. The maximum shear strength reached 105.5 MPa at 1173 K/15 min and the mechanism was discussed.

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Microstructure and mechanical properties of BN-Si3N4 and AlON joints brazed with Ag-Cu-Ti filler alloy

Cited by 24 publications

References 28 publications

Oxidation resistance performance of SiC-AlON ceramic composites at high temperature

Oxidation resistance performance of SiC-AlON ceramic composites at high temperature

Realizing the Air Joining of ZrO2 Ceramics Through Al Metal

Microstructure and Shear Strength of Brazing TiAl/Si3N4 Joints with Ag-Cu Binary Alloy as Filler Metal

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