Thermal conductivity of CVD diamond at elevated temperatures

Sukhadolau, A.V.; Ивакин, Е. В.; Ralchenko, V.G.; Хомич, А. В.; Власов, А. В.; Попович, А. Ф.

doi:10.1016/j.diamond.2004.12.002

Cited by 120 publications

(56 citation statements)

References 22 publications

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“…A small anisotropy in κ is revealed at 300 K and 350 K. The result of calculations from Fig.6 show that the κ⊥ is higher by 9% than κⅡ at 300 K, which is similar to the results (10 %~15 %)obtained by A.V. Sukhadolau [25]. The gran boundaries would scatter the phonons, and consequently reduce the mean free path l when phonons propagate perpendicular to the columns.…”

Section: Basic Characterizations Of Free-standing Diamond Filmssupporting

confidence: 90%

See 1 more Smart Citation

High temperature thermal conductivity of free-standing diamond films prepared by DC arc plasma jet CVD

Zhu

Miao²,

Liu

et al. 2014

Diamond and Related Materials

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Section: Basic Characterizations Of Free-standing Diamond Filmssupporting

confidence: 90%

“…The grain boundary scattering mechanisms ( 1 boundary l  ) is dominate only at low temperature(<200K) [25,26], and weakens when temperature increases. So it is believed that 1 boundary l  can be negligible when phonons propagate perpendicular to the columns of diamond film above 400K.…”

Section: Accepted Manuscriptmentioning

confidence: 98%

High temperature thermal conductivity of free-standing diamond films prepared by DC arc plasma jet CVD

Zhu

Miao²,

Liu

et al. 2014

Diamond and Related Materials

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“…Although theory predicts a room temperature thermal conductivity of 6,000 W/mK [35], Kim et al estimate the thermal conductivity of MWCNTs to be 3,000 W/mK [36], and Pop et al report 3,500 W/mK for SWCNTs [37]. This is significantly higher than the thermal conductivity of diamond (1,000-2,200 W/mK) which is reported to be one of the best known thermal conductors [38].The oxidative thermal stability for both MWCNTs and SWCNTs are greater than 600°C which compares strongly with that of 450-650°C for graphite. Their co-efficient of thermal expansion is very minimal which supports the excellent thermal conductivity of these materials.…”

Section: Properties Of Cntmentioning

confidence: 88%

Thermoplastic Nanocomposites with Carbon Nanotubes

Sathyanarayana

Hübner²

2013

Structural Nanocomposites

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The potential impact of light-weight structures with multifunctional properties for engineering applications drives significant research and development activities on nanocomposites. Polymer nanocomposites especially those with carbon nanotubes (CNTs) are very attractive for conductive composites with good structural characteristics. The biggest challenge facing the commercial success of CNT based composites is the intrinsic strength of their agglomerates which prevents good filler dispersion in the matrix, a key attribute for any reinforcement. This chapter is a review of the CNT incorporated thermoplastic composites processed mainly containing economic multi-walled carbon nanotubes (MWCNTs). We present an overview of CNTs (their structure, production process, properties, surface modification, applications etc.) and the mechanism of their dispersion in thermoplastic matrices. The processing of thermoplastic matrices via the conventional twin-screw compounding approach is discussed along with the influence of process parameters on MWCNT dispersion. The role of secondary processing operation on composite properties is also highlighted. The mechanical, electrical and thermal properties of the thermoplastic-CNT composites are reviewed highlighting the key findings and shortcomings. We conclude throwing some light on the developments on multi-scale reinforcements in polymeric matrices.

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“…The B-NCD thin films have been subject to a great deal of attention due to their outstanding properties, remarkable hardness, optical transparency in a broad wavelength [31,32], high thermal conductivity [33] as well as biocompatibility [34,35]. Unlike the rough polycrystalline films with grain sizes above 500 nm, NCD films with typical grain sizes and surface roughness of less than 100 nm are relatively smooth showing properties close to single crystal diamond [36].…”

Section: Introductionmentioning

confidence: 99%

Fabrication and characterization of boron-doped nanocrystalline diamond-coated MEMS probes

et al. 2016

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Fabrication processes of thin boron-doped nanocrystalline diamond (B-NCD) films on silicon-based micro-and nano-electromechanical structures have been investigated. B-NCD films were deposited using microwave plasma assisted chemical vapour deposition method. The variation in B-NCD morphology, structure and optical parameters was particularly investigated. The use of truncated cone-shaped substrate holder enabled to grow thin fully encapsulated nanocrystalline diamond film with a thickness of approx. 60 nm and RMS roughness of 17 nm. Raman spectra present the typical boron-doped nanocrystalline diamond line recorded at 1148 cm -1 . Moreover, the change in mechanical parameters of silicon cantilevers over-coated with boron-doped diamond films was investigated with laser vibrometer. The increase of resonance to frequency of over-coated cantilever is attributed to the change in spring constant caused by B-NCD coating. Topography and electrical parameters of boron-doped diamond films were investigated by tapping mode AFM and electrical mode of AFM-Kelvin probe force microscopy (KPFM). The crystallite-grain size was recorded at 153 and 238 nm for boron-doped film and undoped, respectively. Based on the contact potential difference data from the KPFM measurements, the work function of diamond layers was estimated. For the undoped diamond films, average CPD of 650 mV and for borondoped layer 155 mV were achieved. Based on CPD values, the values of work functions were calculated as 4.65 and 5.15 eV for doped and undoped diamond film, respectively. Boron doping increases the carrier density and the conductivity of the material and, consequently, the Fermi level.

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Thermal conductivity of CVD diamond at elevated temperatures

Cited by 120 publications

References 22 publications

High temperature thermal conductivity of free-standing diamond films prepared by DC arc plasma jet CVD

High temperature thermal conductivity of free-standing diamond films prepared by DC arc plasma jet CVD

Thermoplastic Nanocomposites with Carbon Nanotubes

Fabrication and characterization of boron-doped nanocrystalline diamond-coated MEMS probes

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