Influences of Sn on Properties of Ag-Based and Cu-Based Brazing Filler Metals

Luo, Qingcheng; Xue, Songbai; Wu, Jie

doi:10.3390/cryst11111403

Cited by 14 publications

(7 citation statements)

References 21 publications

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“…However, a large amount of Cu 3 P compounds leads to poor plasticity at room temperature [5]. Adding various alloying elements is one of the most common and effective methods researchers use to improve the brazing performance of Cu-P brazing materials [6,7]. The effect of Ag addition on Cu-P brazing materials was investigated by Tan-Dong Xia et al [8].…”

Section: Introductionmentioning

confidence: 99%

First-Principles Calculations of the Mechanical Properties of Doped Cu3P Alloys

Ma,

Cheng,

Huang

et al. 2024

Materials

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In the quest to enhance the mechanical properties of CuP alloys, particularly focusing on the Cu3P phase, this study introduces a comprehensive investigation into the effects of various alloying elements on the alloy’s performance. In this paper, the first principle of density universal function theory and the projection-enhanced wave method under VASP 5.4.4 software are used to recalculate the lattice constants, evaluate the lattice stability, and explore the mechanical properties of selected doped elements such as In, Si, V, Al, Bi, Nb, Sc, Ta, Ti, Y and Zr, including shear, stiffness, compression, and plasticity. The investigation reveals that strategic doping with In and Si significantly enhances shear resistance and stiffness, while V addition notably augments compressive resistance. Furthermore, incorporating Al, Bi, Nb, Sc, Ta, Ti, V, Y, and Zr has substantially improved plasticity, indicating a broad spectrum of mechanical enhancement through precise alloying. Crucially, the validation of our computational models is demonstrated through hardness experiments on Si and Sn-doped specimens, corroborating the theoretical predictions. Additionally, a meticulous analysis of the states’ density further confirms our computational approach’s accuracy and reliability. This study highlights the potential of targeted alloying to tailor the mechanical properties of Cu3P alloys and establishes a robust theoretical framework for predicting the effects of doping in metallic alloys. The findings presented herein offer valuable insights and a novel perspective on material design and optimization, marking a significant stride toward developing advanced materials with customized mechanical properties.

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Section: Introductionmentioning

confidence: 99%

First-Principles Calculations of the Mechanical Properties of Doped Cu3P Alloys

Ma,

Cheng,

Huang

et al. 2024

Materials

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“…Copper–phosphorous (Cu–P) brazing alloys are types of brazing filler metal that are primarily composed of copper (Cu) and phosphorus (P), and that are widely applied in the aerospace, electronics, energy, transportation, military, and automobile industries due to their excellent properties [ 1 , 2 ]. P element can decrease the filler metal’s melting temperature and increase the substrate’s spreading area [ 3 ]. However, Cu–P solder contains a lot of Cu 3 P compounds, which results in poor plasticity at room temperature.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Wettability of Cu3P/Cu Systems through Doping with Si, Sn, and Zr Elements: Insights from First Principles Analysis

Cheng

He³

et al. 2023

Materials

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Explaining the wetting mechanism of Cu–P brazing materials and Cu remains challenging. This fundamental research aims to reveal the wettability mechanism of Si, Sn, and Zr doping on the interfacial bond strength of the Cu3P/Cu system through the first principles study. We carried out several sets of calculations to test the validity of the result; included in the work are those used to establish the interfacial structure and to analyze the effect of doping on the wettability. Specific analysis was carried out in terms of three aspects: the work of adhesion (Wad), the charge density difference, and the density of states (DOS). The calculated results show that doping with Si, Sn, and Zr elements can effectively improve the wettability within the CuP/Cu interface with very high accuracy, and is particularly effective when doped with Zr. These results provide an insightful theoretical guide for enhancing the CuP/Cu system’s wettability by adding active elements.

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“…The selection of appropriate brazing materials for vacuum brazing of stainless steel requires the use of high-temperature brazing materials such as copper-based, nickel-based, silver-based, and iron-based materials [6][7][8][9]. Among these, copper-based brazing materials are the most widely used due to their excellent processability, wetting performance, caulking ability, joint strength, and cost-effectiveness in brazing various metals [10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Effects of nickel layer on interfacial micro-structure distribution and macro-mechanical properties for vacuum-brazed dissimilar steel joints

Wang

Wei

et al. 2023

Weld World

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In this paper, nickel-plated Q235 carbon steel and 304 stainless steel were vacuum brazed together using pure copper foil as the ller metal. The effects of nickel plating at the carbon steel surface on the shear strength of the brazed joints were investigated and veri ed by the nite element analysis method. The microstructure and shear strength of the brazed dissimilar steel joints were characterized by SEM and tensile experiments. The results found that the pure copper brazing material exhibited excellent wettability to the base metal. With the increase of heat treatment temperature and holding time, the plated Ni particles fuse with each other and the boundary of the Ni particles gradually disappears, which increases the diffusion distance of Fe, Ni, and P elements and the width of the interface transition zone.The maximum shear strength of the brazed dissimilar steel joint without the nickel layer is 265.9 MPa for the optimized brazing parameters with 0.06 mm thickness of pure copper foil. After nickel plating on the carbon steel surface with heat treatment of 500 ℃ for 1 h, the shear strength of the brazed dissimilar steel joint reduces to 213.4 MPa, which may be due to the formation of brittle intermetallic compounds by Ni and P elements on the surface of the layer at high temperatures.

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Influences of Sn on Properties of Ag-Based and Cu-Based Brazing Filler Metals

Cited by 14 publications

References 21 publications

First-Principles Calculations of the Mechanical Properties of Doped Cu3P Alloys

First-Principles Calculations of the Mechanical Properties of Doped Cu3P Alloys

Enhancing Wettability of Cu3P/Cu Systems through Doping with Si, Sn, and Zr Elements: Insights from First Principles Analysis

Effects of nickel layer on interfacial micro-structure distribution and macro-mechanical properties for vacuum-brazed dissimilar steel joints

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