Microstructure and thermal conductivity of Cu/diamond composites with Ti-coated diamond particles produced by gas pressure infiltration

Li, Jianwei; Zhang, Hailong; Zhang, Yang; Che, Zifan; Wang, Xitao

doi:10.1016/j.jallcom.2015.06.062

Cited by 104 publications

(18 citation statements)

References 32 publications

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“…Diamond-reinforced MMCs are novel materials in which the metallic phase acts as a binder, while the diamond phase helps to improve the material properties. Currently, the common ways to fabricate bulk diamond-reinforced MMCs or MMC coatings are powder metallurgy [95][96][97][98][99], pressure infiltration techniques [100][101][102][103][104], and thermal spray techniques [105][106][107][108][109]. ese methods mostly require extremely high processing temperatures to melt the metal binder, thereby significantly increasing the risk of the metal phase transformation and diamond graphitization [97].…”

Section: Diamond-reinforced MMC Coatingsmentioning

confidence: 99%

Cold‐Sprayed Metal Coatings with Nanostructure

Yin

Chen

Suo

et al. 2018

Advances in Materials Science and Engineering

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Cold spray is a solid-state coating deposition technology developed in the 1980s. In comparison with conventional thermal spray processes, cold spray can retain the original properties of feedstock, prevent the adverse influence on the underlying substrate materials, and produce very thick coatings. Coatings with nanostructure offer the potential for significant improvements in physical and mechanical properties as compared with conventional non-nanostructured coatings. Cold spray has also demonstrated great capability to produce coatings with nanostructure. is paper is aimed at providing a comprehensive overview of cold-sprayed metal coatings with nanostructure. A brief introduction of the cold spray technology is provided first. e nanocrystallization phenomenon in the conventional cold-sprayed metal coatings is then addressed. ereafter, focus is switched to the microstructure and properties of the cold-sprayed nanocrystalline metal coatings, and the cold-sprayed nanomaterialreinforced metal matrix composite (MMC) coatings. At the end, summary and future perspectives of the cold spray technology in producing metal coatings with nanostructure are concluded.

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Section: Diamond-reinforced MMC Coatingsmentioning

confidence: 99%

Cold‐Sprayed Metal Coatings with Nanostructure

Yin

Chen

Suo

et al. 2018

Advances in Materials Science and Engineering

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“…These properties are defined by the qualities of the matrix, matrix-particle interface, and the reinforcement particles. There are several production techniques for DMMC, including sintering techniques [1] , pressure infiltration [2], and cold spray deposition [3,4]. The former two methods require high temperature processing that may lead to high residual thermal stress development or even diamond graphitization.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Fatigue Properties of Diamond Reinforced Cu and Al Metal Matrix Composites Prepared by Cold Spray

Kovářík

Yin

Lupoi

et al. 2021

Thermal Spray 2021: Proceedings From the International Thermal Spray Conference

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Diamond-reinforced composites prepared by cold spray are emerging materials simultaneously featuring outstanding thermal conductivity and wear resistance. Their mechanical and fatigue properties relevant to perspective engineering applications were investigated using miniature bending specimens. Cold sprayed specimens with two different mass concentrations of diamond 20% and 50% in two metallic matrices (Al – lighter than diamond; Cu – heavier than diamond) were compared with the respective pure metal deposits. These pure metal coatings showed rather limited ductility. The diamond addition slightly improved ductility and fracture toughness of the Cu-based composites; having a small effect also on the fatigue crack growth resistance. In case of the Al composites; the ductility as well as fatigue crack growth resistance and fracture toughness have improved significantly. The static and fatigue failure mechanisms were fractographically analyzed and related to the microstructure of the coatings; observing that particle decohesion is the primary failure mechanism for both static and fatigue fracture.

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“…Both Ciupinski et al [14] and Wang et al [15] revealed that the addition of the carbide-forming element chromium to a copper matrix effectively improved the TCs of composites. Li et al [16] illustrated that a high TC was achieved in Ti-coated Cu/diamond composites fabricated by gas pressure infiltration.…”

Section: Introductionmentioning

confidence: 99%

The Interface and Fabrication Process of Diamond/Cu Composites with Nanocoated Diamond for Heat Sink Applications

Zhou

et al. 2021

Metals

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The coefficients of thermal expansion (CTE) and thermal conductivity (TC) are important for heat sink applications, as they can minimize stress between heat sink substrates and chips and prevent failure from thermal accumulation in electronics. We investigated the interface behavior and manufacturing of diamond/Cu composites and found that they have much lower TCs than copper due to their low densities. Most defects, such as cavities, form around diamond particles, substantially decreasing the high TC of diamond reinforcements. However, the measurement results for the Cu-coated diamond/Cu composites are unsatisfactory because the nanosized copper layer on the diamond surface grew and spheroidized at elevated sintering temperatures. Realizing ideal interfacial bonding between a copper matrix and diamond particles is difficult. The TC of the 40 vol.% Ti-coated diamond/Cu composite is 475.01 W m−1 K−1, much higher than that of diamond/Cu and Cu-coated diamond/Cu composites under equivalent manufacturing conditions. The minimally grown titanium layer retained its nanosized and was consistent with the sintering temperature. Depositing a nanosized titanium layer on a diamond surface will strengthen interfacial bonding through interface reactions among the copper matrix, nanosized titanium layer and diamond particles, reducing the interfacial thermal resistance and exploiting the high TC of diamond particles, even if defects from powder metallurgy remain. These results provide an important experimental and theoretical basis for manufacturing diamond/Cu composites for heat sink applications.

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Microstructure and thermal conductivity of Cu/diamond composites with Ti-coated diamond particles produced by gas pressure infiltration

Cited by 104 publications

References 32 publications

Cold‐Sprayed Metal Coatings with Nanostructure

Cold‐Sprayed Metal Coatings with Nanostructure

Mechanical and Fatigue Properties of Diamond Reinforced Cu and Al Metal Matrix Composites Prepared by Cold Spray

The Interface and Fabrication Process of Diamond/Cu Composites with Nanocoated Diamond for Heat Sink Applications

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