Effect of the Surface Modification of Synthetic Diamond with Nickel or Tungsten on the Properties of Copper–Diamond Composites

Ukhina, Arina V.; Dudina, Dina V.; Samoshkin, D. A.; Галашов, Е. Н.; Сковородин, И. Н.; Bokhonov, Boris B.

doi:10.1134/s0020168518050151

Cited by 18 publications

(7 citation statements)

References 15 publications

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“…The low thermal expansion coefficients of the composites further confirm a strong diamond-Cu connection. It can be seen from Figure 6F that compared with the diamond/Cu composite reported in the literature, 6,8,10,13,15,16,[18][19][20]32,33 the experimental thermal diffusivity of 311 mm 2 s −1 is the highest, and the density of 3.78 g cm −3 is the lowest, which are more in line with the requirements of high thermal diffusion and lightweight electronic packaging materials.…”

supporting

confidence: 76%

“…12 Commonly used transition layer metals include Chromium (Cr), [12][13][14] Titanium (Ti), 5 Zirconium (Zr), 8,15 Boron (B), [16][17][18] and Tungsten (W). 10,19,20 For instance, adding 1.5 wt% Ti to Cu metal was reported to improve the interface bonding between the copper matrix and diamond, in which the thermal conductivity of the Cu-diamond (55 vol%) composite prepared by hot forging can reach up to 410 W m −1 K −1 . 5 In another study, it was reported that Cu-3 wt% Cr/diamond (55 vol%) composite materials have a thermal conductivity of 433 W m −1 K −1 .…”

Section: Introductionmentioning

confidence: 99%

“…The thermal conductivity of W-coated diamond particle-reinforced copper matrix composites can theoretically reach more than 900 W m −1 K −1 . 10 At present, the main methods for preparing diamond/ Cu composites include vacuum hot pressing, 20 discharge plasma sintering, 19 gas infiltration, high-temperature and high-pressure sintering, 8,17 and so forth. It is widely known that magnetron sputtering technology and hightemperature and high-pressure technology have been applied in many industrial fields, and the use of these technologies will enable surface modification of diamond particles and further preparation of composite heat dissipation materials that are more conducive to industrial application.…”

Section: Introductionmentioning

confidence: 99%

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Lightweight diamond/Cu interface tuning for outstanding heat conduction

Dou

Zhu

et al. 2023

Carbon Energy

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With rapid developments in the field of very large‐scale integrated circuits, heat dissipation has emerged as a significant factor that restricts the high‐density integration of chips. Due to their high thermal conductivity and low thermal expansion coefficient, diamond/Cu composites have attracted considerable attention as a promising thermal management material. In this study, a surface tungsten carbide gradient layer coating of diamond particles has been realized using comprehensive magnetron sputtering technology and a heat treatment process. Diamond/Cu composites were prepared using high‐temperature and high‐pressure technology. The results show that, by adjusting the heat treatment process, tungsten carbide and di‐tungsten carbide are generated by an in situ reaction at the tungsten–diamond interface, and W–WC–W2C gradient layer‐coated diamond particles were obtained. The diamond/Cu composites were sintered by high‐temperature and high‐pressure technology, and the density of surface‐modified diamond/Cu composites was less than 4 g cm−3. The W–WC–W2C@diamond/Cu composites have a thermal diffusivity as high as 331 mm2 s−1, and their thermal expansion coefficient is as low as 1.76 × 10−6 K−1. The interface coherent structure of the gradient layer‐coated diamond/copper composite can effectively improve the interface heat transport efficiency.

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supporting

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Lightweight diamond/Cu interface tuning for outstanding heat conduction

Dou

Zhu

et al. 2023

Carbon Energy

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“…This problem can be solved by depositing coatings on the diamond surface. Several methods have been used to modify the diamond surface [ 2 , 3 , 4 , 5 , 6 ], which include magnetron sputtering and electroless plating [ 2 ], magnetron sputtering combined with annealing [ 3 ], and the vacuum micro-vapor deposition method [ 4 ]. The carbide-forming metals are mainly used for making the coatings [ 7 , 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

Selective Deposition of Mo2C-Containing Coatings on {100} Facets of Synthetic Diamond Crystals

Ukhina

Bokhonov

Dudina

2022

IJMS

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An efficient way to improve the properties of metal–diamond composites (mechanical strength, wear resistance, thermal conductivity) is the preliminary modification of the diamond surface to improve its wettability by the metal matrix. In the present work, Mo2C-containing coatings were deposited on the diamond crystals under different conditions: hot pressing (atmosphere of argon), spark plasma sintering (forevacuum), and annealing in air. The influence of the sintering parameters on the morphology and phase composition of the coatings deposited on diamond was studied. Mo2C-containing coatings were selectively deposited on the facets of synthetic diamond microcrystals by annealing of the latter with a molybdenum powder. Experiments were carried out to deposit coatings under different conditions: during hot pressing (argon atmosphere), spark plasma sintering (forevacuum), and annealing in air. The process parameters were the temperature, holding time, and concentration of molybdenum in the initial mixture. Experiments with a pre-oxidized molybdenum powder were also conducted. The coated diamond crystals were investigated by X-ray diffraction, scanning electron microscopy, and energy-dispersive spectroscopy. The deposition was enabled by the gas phase transport of molybdenum dioxide, MoO2, contained in the starting powder. The following sequence of the coating formation stages was proposed. First, MoO2 sublimes and is adsorbed mainly on the {100} facets of diamond. Then, it is reduced to metallic molybdenum by carbon of the diamond, which further reacts with carbon to form the Mo2C carbide phase. These processes occurred during treatment of the mixtures in the hot press and the spark plasma sintering facility. When the mixture was annealed in air, no selective deposition was observed. During annealing, MoO3 particles adhered to the diamond surface.

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“…Therefore, pretreatment of the diamond powders is very important for ensuring adhesion between the diamond and matrix. In recent years, research has focused on surface pretreatments of the diamond to solve such problems [16][17][18]. Scholars found that tungsten layers can be coated on diamond by a microvacuum evaporation diffusion method and then, diamond/copper composites can be prepared by vacuum pressureless infiltration.…”

Section: Introductionmentioning

confidence: 99%

Effect of Diamond Surface Pretreatment and Content on the Microstructure and Mechanical and Oxidation Behaviour of NiAl/Fe-Based Alloys

Bai

Luo

et al. 2020

Scanning

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The effect of diamond surface pretreatment and content on the microstructure and mechanical properties of NiAl/Fe–x diamond (x=0,5,10,15,and 20 wt.%) alloys was investigated after mechanical alloying with subsequent hot-pressing sintering. The results showed that after the surface pretreatment, a complete transition layer containing W existed on the outer surface of the diamond grains, which improved the interfacial bonding strength of the diamond grains and NiAl/Fe matrix to an excellent level. As the diamond content increased, the compressive strength of the NiAl/Fe-based alloys declined, but the alloy with 10 wt.% diamond had a higher value than that of the other NiAl/Fe-based alloys. Short cracks and transgranular fracture were observed in the fracture surface of all materials. For the material with 20 wt.% diamond, intergranular fracture was obvious, and many diamond particles appeared along the fracture direction, which caused the compressive strength to be the lowest of the samples considered in this study. After the addition of diamond, the oxidation resistance of NiAl/Fe-based alloys decreased due to a loose oxidation layer and diamond graphitization. The thermal conductivity of the alloy first increased and then decreased with increasing diamond content. A NiAl/Fe-based alloy with 15 wt.% diamond demonstrated the maximum thermal conductivity of 53.2 W/(m·k) at 600°C among the samples in this study.

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Effect of the Surface Modification of Synthetic Diamond with Nickel or Tungsten on the Properties of Copper–Diamond Composites

Cited by 18 publications

References 15 publications

Lightweight diamond/Cu interface tuning for outstanding heat conduction

Lightweight diamond/Cu interface tuning for outstanding heat conduction

Selective Deposition of Mo2C-Containing Coatings on {100} Facets of Synthetic Diamond Crystals

Effect of Diamond Surface Pretreatment and Content on the Microstructure and Mechanical and Oxidation Behaviour of NiAl/Fe-Based Alloys

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