A study on graphitization of diamond in copper–diamond composite materials

Shao, Wen‐Zhu; Иванов, В.В.; Zhen, Liang; Cui, Yan; Wang, Y.

doi:10.1016/s0167-577x(03)00433-6

Cited by 88 publications

(37 citation statements)

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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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“…Известно, что графитизация алмаза начинается при температурах выше 700 °C [12], а при меха-ническом легировании, характеризующемся со-общением обрабатываемому материалу большо-го количества механической энергии, возможно достижение в локальных точках существенного разогрева [1]. Однако решение данного вопроса требует дополнительных исследований, так как дифракционные пики как алмаза, так и графита на рентгенограммах изучаемых материалов не вы-являются (см.…”

Section: результаты и их обсуждениеunclassified

Mechanical alloying of aluminum alloy with nanodiamond particles

Prosviryakov

2015

Russ. J. Non-ferrous Metals

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Исследовали форму, размер и микротвердость порошков композиционных материалов на основе сплава Al-2Cu-1,6Mn-0,4Zr (мас.%), упроч-ненных частицами наноалмаза в количестве 0-10 об.%, в зависимости от продолжительности механического легирования (МЛ). Максимальное время обработки в шаровой планетарной мельнице составило 15 ч. Показано, что с возрастанием времени МЛ средний размер гранул ком-позиционных материалов, полученных с использованием стружковых матричных частиц размером порядка 1000 мкм, уменьшается вплоть до 30 мкм. В процессе МЛ микротвердость материалов увеличивается до 270-320 HV. Ключевые слова: металломатричный композиционный материал, дисперсное упрочнение, механическое легирование, морфология, микро-твердость, алюминий, наноалмаз.The shape, dimension, and microhardness of Al-2Cu-1,6Mn-0,4Zr (wt. %) based composite material powders hardened by nanodiamond particles in amount of 0-10 vol. % depending on mechanical alloying duration have been investigated. The maximum run time in planetary ball mill is 15 h. Mean pellet size of composite materials obtained with the use of chip matrix particles of 1000 μm in size is shown to decrease up to 30 μm when mechanical alloying time increases. In the course of mechanical alloying the material microhardness rises to 270-320 HV.

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“…The "ADS" company offered nanocomposite materials on a Cu and diamond basis that have a higher heat conductivity in comparison with traditionally used materials on a Cu or Al basis. Moreover, particles of diamond in copper-diamond composites show a high degree of stability to graphitization under sintering at temperatures up to 1150-1250K, and thus this composite material can be used for the creation of contacts and high-current electric contacts in the lowvoltage equipment 55) . In order to prepare such nanocomposites, the method based on ARW by MA in MRs (with cupric milling tools) using par ticles of substandard diamonds appears interesting and very able to replace various labor-and power-consuming processes, see Fig.…”

Section: Arw In Copper-diamond-graphite Systemmentioning

confidence: 99%

Phenomenology, Kinetics and Application of Abrasive-Reactive Wear during Comminution (Overview)

Уракаев

Шевченко

2007

KONA

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Valuable information on the phenomenology of mechanical activation will be obtained from the accurate characterization of wearing processes that take place within mechanochemical reactors. Favoring the contamination of reactant powders with material from a reactor s debris, for a long time such processes represented one of the greatest limitations to practical mechanochemistry applications. We will focus on two related aspects of mechanochemical processing by grinding in a ball mill: (i) nanoscale wear of the treated substances and of the milling tools (balls and container wall); and (ii) deposition of a powder coating on the surface of the milling tools (self-lining phenomenon). A new technology called abrasive-reactive wear (ARW) has been developed that utilizes wear debris as an integral component of the reaction system rather than treating it as a harmful impurity. This technology is applied to the preparation of nanocomposites and to the processing of mineral raw materials and industrial byproducts. This review includes preparation experiments, material characterization, ARW kinetics and simulation. Besides developing new technologies, ARW will contribute to a better understanding of the mechanochemical or mechanical alloying process in general.

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A study on graphitization of diamond in copper–diamond composite materials

Cited by 88 publications

References 0 publications

Cold‐Sprayed Metal Coatings with Nanostructure

Cold‐Sprayed Metal Coatings with Nanostructure

Mechanical alloying of aluminum alloy with nanodiamond particles

Phenomenology, Kinetics and Application of Abrasive-Reactive Wear during Comminution (Overview)

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