Wetting and Brazing of Chromium Film-Deposited Alumina Using AgCu Filler Metal

Chen, Z. B.; Bian, Hong; Niu, Chaonan; Song, Xiaoguo; Lei, Yizhu; Cheng, Jin; Cao, Jian; Feng, Jicai

doi:10.1007/s11665-018-3557-6

Cited by 6 publications

(3 citation statements)

References 32 publications

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“…Although the migration of these elements helps in wetting the base materials, local segregation of these elements could also lead to the formation of brittle intermetallic phases. While the insufficient migration of elements would lead to inadequate wetting, excessive migration also leads to preferential movement of elements to form intermetallic compounds and result in poor wetting [68][69][70]. Hence formation of intermetallic compounds should be avoided in order to improve the wetting properties.…”

Section: Cu-38znmentioning

confidence: 99%

Progress in Improving Joint Strength of Brazed Cemented Carbides and Steels

Sharma

Kannan

Hogan

et al. 2021

Science and Technology of Welding and Joining

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Surface mining causes significant wear damage that affects equipment performance, reliability, and lead to associated downtime costs. To improve the wear resistance of components used in natural resources industries, cemented carbide tiles are joined to engaging surfaces of the components. Joining of cemented carbide to structural steel can be achieved by various processes, among which brazing is commonly used owing to its relatively simple processing and low cost. A significant challenge in brazing cemented carbide tiles to steels is the poor joint strength. This article aims to review the recent progress in improving joint strength of cemented carbide/steel brazing. Recent progress on the key factors, including type of filler metals, evolution of joint microstructure, generation of residual stresses, and process parameters have been closely examined and critically analysed. Future directions of research on brazing cemented carbide tiles to steel in order to improve joint strength have been proposed.

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Section: Cu-38znmentioning

confidence: 99%

Progress in Improving Joint Strength of Brazed Cemented Carbides and Steels

Sharma

Kannan

Hogan

et al. 2021

Science and Technology of Welding and Joining

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“…to conventional fillers and achieving metallurgical bonding through the interaction between the active elements and the ceramics. [8][9][10][11][12][13] Active metal brazing is usually carried out in a high vacuum environment, which has high requirements for equipment and leads to higher joint costs. In addition, the active elements in the filler undergo varying degrees of oxidation in an oxidizing environment at high temperatures, leading to a significant deterioration in the mechanical properties of the joint.…”

Section: Introductionmentioning

confidence: 99%

“…Currently, ceramics are mainly joined by active metal brazing, which involves adding active elements (Ti, Zr, Cr, V, etc.) to conventional fillers and achieving metallurgical bonding through the interaction between the active elements and the ceramics 8–13 …”

Section: Introductionmentioning

confidence: 99%

Effect of TiO₂ addition on microstructure and mechanical properties of Al₂O₃ ceramic joints brazed with Ag‐CuO fillers

Yang,

Zhao,

et al. 2024

Int J Applied Ceramic Tech

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In our work, 0.5 mol.% TiO2 was added to Ag‐xCuO (x = 2, 4, 8 mol.%) fillers whose compositions at 1050°C were in the L2 single liquid phase region, the boundary of the miscible phase region, and the L1+L2 miscible phase region, respectively. The role of TiO2 was derived by comparing the quenching microstructure of the fillers on the Al2O3 ceramics and the effect on the interfacial microstructure and shear strength of the joints before and after the addition of TiO2. The results showed that the TiO2 would dissolve into the CuO‐rich L1 liquid phase of the filler, leading it to spread outside the molten droplet. When brazing with Ag‐4CuO‐0.5TiO2 filler, the CuO at the joint interface almost completely disappeared, and the shear strength of the joint was significantly reduced. In contrast, the joint strength showed a small increase when using Ag‐8CuO‐0.5TiO2 filler, as the excess CuO at the interface of the brazed joint was reduced. When the filler composition was in the L2 single liquid phase region, CuO was diffusely distributed throughout the molten droplet. TiO2 was hardly contacted with CuO and its addition had no significant effect on the interfacial microstructure and the shear strength of the joints.

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