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Journal Articles

TEM studies of nanocarbons and nanodiamonds (ND); Mechanical milling of ND and Cu

Yamamoto, Kazunori; Taguchi, Tomitsugu; Hanada, Kotaro*; Osawa, Eiji*; Inakuma, Masayasu*; Livramento, V.*; Correia, J, B.*; Shohoji, Nobumitsu*

Diamond and Related Materials, 16(12), p.2058 - 2062, 2007/12

 Times Cited Count:6 Percentile:31.25(Materials Science, Multidisciplinary)

Nano-sized polymorphs of carbon continue to attract much attention of scientists and provide new targets of examination with transmission electron microscope (TEM). We present here TEM images of a number of nanocarbons which played critical roles in some stage of their R&D, such as mechanical alloying of Cu and nanodiamond, diamond from soot, and short carbon nanocylinders by milling with microbeads. Emphasis is placed on nanodiamonds.

Journal Articles

Further studies on copper nanocomposite with dispersed single-digit-nanodiamond particles

Hanada, Kotaro*; Yamamoto, Kazunori; Taguchi, Tomitsugu; Osawa, Eiji*; Inakuma, Masayasu*; Livramento, V.*; Correia, J, B.*; Shohoji, Nobumitsu*

Diamond and Related Materials, 16(12), p.2054 - 2057, 2007/12

 Times Cited Count:26 Percentile:70.34(Materials Science, Multidisciplinary)

This paper describes the microstructures and mechanical properties of Cu nanocomposites containing 0-30 at% diamond nanoparticles. The Cu nanocomposite powders are fabricated by mechanical milling method and are consolidated by spark plasma sintering and hot extrusion. Microstructural observation shows that the homogeneous distribution of diamond nanoparticles in the Cu nanocomposite can be achieved by extrusion with large plastic deformation, in spite of 20 at% diamond content, and that the nanocomposite with homogeneous distribution of diamond nanoparticles has ultra-fine grain structure, approximately 50 nm. Vickers hardness and compression tests on the SPS-consolidated and hot-extruded samples show that the detonation nanodiamond dispersed homogeneously in the Cu matrix enhances the mechanical properties.

Journal Articles

Tensile and fatigue strength of free-standing CVD diamond

Davies, A. R.*; Field, J. E.*; Takahashi, Koji; Hada, Kazuhiko

Diamond and Related Materials, 14(1), p.6 - 10, 2005/01

 Times Cited Count:21 Percentile:61.84(Materials Science, Multidisciplinary)

A CVD diamond is finding increased application and it is important to study its fatigue properties. The present paper describes research on a batch of di-electric grade CVD material. It was obtained that tensile strength at the nucleation side and the growth were side 690$$pm$$90MPa and 280$$pm$$30MPa, respectively. Some samples survived at least 95% of their critical fracture stress for 10$$^{7}$$ cycles without fatiguing.

Journal Articles

Kinetics of diamond spontaneous crystallization from the melt of the Fe-Al-C system at 6.5 GPa

Turkevich, V.*; Okada, Taku; Utsumi, Wataru; Garan, A.*

Diamond and Related Materials, 11(10), p.1769 - 1773, 2002/10

 Times Cited Count:18 Percentile:64.18(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Nucleation of carbon onions and manocapsules under ion implantation at high temperature

Abe, Hiroaki

Diamond and Related Materials, 10(3-7), p.1201 - 1204, 2001/07

 Times Cited Count:16 Percentile:63.5(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

AFM Investigation of growth process of C$$_{60}$$ thin films on a KBr(001) surface

Narumi, Kazumasa; Naramoto, Hiroshi

Diamond and Related Materials, 10(3-7), p.980 - 983, 2001/03

 Times Cited Count:3 Percentile:22.28(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Determination of metallic impurities in high-parity type IIa diamond grown by high-pressure and high-temperature synthesis using neutron activation analysis

Kaneko, Junichi; Yonezawa, Chushiro; Kasugai, Yoshimi; Sumiya, Hitoshi*; Nishitani, Takeo

Diamond and Related Materials, 9(12), p.2019 - 2023, 2000/12

 Times Cited Count:9 Percentile:47.87(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

In-situ X-ray observation of phase transformation of rhombohedral boron nitride under static high pressure and high temperature

Taniguchi, Takashi*; Sato, Masashi*; Utsumi, Wataru; Kikegawa, Takumi*; Shimomura, Osamu

Diamond and Related Materials, 6(12), p.1806 - 1815, 1997/12

 Times Cited Count:17 Percentile:69.62(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

ESR studies of incorporation of phosphorus into high-pressure synthetic diamond

Isoya, Junichi*; Kanda, Hisao*; Akaishi, Minoru*; Morita, Yosuke; Oshima, Takeshi

Diamond and Related Materials, 6(2-4), p.356 - 360, 1997/03

 Times Cited Count:33 Percentile:83.79(Materials Science, Multidisciplinary)

no abstracts in English

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