Improved wetting of gold active braze alloy on diamond for use in medical implants

Edalati, Khatereh; Stamp, Melanie; Ganesan, Kumaravelu; Stacey, Alastair; Martin-Hardy, Gabriel; Fontaine, R.; Prawer, S.; Garrett, David J.

doi:10.1016/j.diamond.2020.108089

Cited by 5 publications

(4 citation statements)

References 30 publications

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“…Hence, the penetration of braze alloys make them suitable for hermetic seals and electrical feed-throughs. 8 B, Si, and Cr reduced the wetting angles of diamond and alumina as well as improved the degree of bonding between them. The bond was weaker for Si.…”

Section: Introductionmentioning

confidence: 99%

“…These interlayers provide excellent penetration of the braze alloy into the grooves and crevices in the diamond surfaces, which facilitates formation of smaller complex microstructures into these voids. Hence, the penetration of braze alloys make them suitable for hermetic seals and electrical feed-throughs . B, Si, and Cr reduced the wetting angles of diamond and alumina as well as improved the degree of bonding between them.…”

Section: Introductionmentioning

confidence: 99%

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Molecular Dynamics Simulation on Wetting of Silver Nanosolder on a Diamond Surface

et al. 2022

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Analyzing the wetting behavior of silver on a diamond substrate is crucial prior to joining and printing diamond chips in electronics, bioimplants, and cutting tool industries. This paper used molecular dynamics models to overcome the hydrophobic behavior. It was observed that the hydrophilic character was well promoted when a nanosolder block of silver was collided at a certain velocity on a diamond substrate in a hydrodynamic state rather than when it was stationary and then heated on diamond. Hydrodynamic wetting led to rapid spreading, which in turn elucidated a high rate of change in contact area to the highest 11 832 Å2 and a high rate of decrease in contact angle to the lowest 23° at the highest contact velocity of 19.7 km/s in minimum time. Therefore, hydrodynamic wetting has a leading margin for silver coating on diamond surfaces over temperature, slab separation, and hydrostatic wetting. This paper provides theoretical insights for effective thin-film development in the least possible time and with the lowest solder consumption.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Molecular Dynamics Simulation on Wetting of Silver Nanosolder on a Diamond Surface

et al. 2022

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“…Diamond doped with W forms dipoles owing to the W–C bond, whereas Cu decreases the dangling and polar surface energy, leading to hydrophobic tendencies . Au-active braze alloys (Au-ABA) exhibit very poor wetting on the diamond; therefore, the addition of Mo and Nb interlayers with single layers of Mo or Nb or Mo/Nb bilayer thin films improved wetting on the diamond surfaces by excellent penetration of the braze alloy into the grooves and crevices in the diamond surfaces, forming smaller complex microstructures in these voids and making it suitable for hermetic seals …”

Section: Introductionmentioning

confidence: 99%

“…13 Au-active braze alloys (Au-ABA) exhibit very poor wetting on the diamond; therefore, the addition of Mo and Nb interlayers with single layers of Mo or Nb or Mo/Nb bilayer thin films improved wetting on the diamond surfaces by excellent penetration of the braze alloy into the grooves and crevices in the diamond surfaces, forming smaller complex microstructures in these voids and making it suitable for hermetic seals. 14 Superhydrophobicity recoils the fluid without wetting the surface until it reaches the maximum diameter. The contact time depends upon the inertia of impact, capillary action, atomistic, and molecular potential with internal dissipation between the surface and liquid.…”

Section: Introductionmentioning

confidence: 99%

Geometrically Amplified Wetting of Silver Nanosolder on a Rough Diamond Surface

Ali,

Cui

2024

ACS Appl. Mater. Interfaces

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The wetting behavior of silver at the nanoscale on a textured diamond substrate is not absolutely roughness-dependent in printing diamond chips, tough bioimplant coating, and joining for cutting tool industries. This study uses a molecular dynamics simulation to capture the stochastic wetting behavior toward precision for given geometries. It is deduced that the metalophilic character of molten silver is increased with an increase in roughness on sinusoidal contoured diamond substrates rather than orthogonal pillars of the same roughness until an equilibration time of 210 ps at a temperature of 950 K. Increasing the roughness after the equilibrium time causes a supermetalophilic angle of 13°for the sinusoid at 500 ps, and the orthogonal design causes the Wenzel state. Therefore, wetting states are metastable and ultimately depend upon the wetting time and geometry rather than the roughness only. A high joining strength creates a long-lasting coating, owing to the high surface energy of the textured surface. This study presents effective thin seam development in the least possible time of 230 ps and silver consumption at the nanoscale for supermetalophilic and metalophobic coatings in electronic packaging.

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Effective removal of metal-carbide contamination from diamond circuit boards by reactive ion etching

Edalati,

Higham,

De Leon

et al. 2023

Diamond and Related Materials

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Improved wetting of gold active braze alloy on diamond for use in medical implants

Cited by 5 publications

References 30 publications

Molecular Dynamics Simulation on Wetting of Silver Nanosolder on a Diamond Surface

Molecular Dynamics Simulation on Wetting of Silver Nanosolder on a Diamond Surface

Geometrically Amplified Wetting of Silver Nanosolder on a Rough Diamond Surface

Effective removal of metal-carbide contamination from diamond circuit boards by reactive ion etching

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