4 edition of Nano- and micro-crystalline diamond films and powders found in the catalog.
Nano- and micro-crystalline diamond films and powders
|LC Classifications||TP873.5.D5 L54 2009|
|The Physical Object|
|LC Control Number||2009006391|
In the present investigation, both micro-crystalline and nanocrystalline diamond (MCD and NCD) films are fabricated, which are characterized by FESEM (Field Emission Scanning Electron Microscopy), surface profilemeter, Raman spectroscopy and Rockwell hardness tester. Moreover, under the dry environment, the frictional behavior of both the films sliding against commonly Cited by: 1. c State Key Laboratory of Powder Metallurgy, Central South University, Changsha, , PR China article info Article history: Received 20 November Received in revised form 10 January Accepted 9 February Available online 16 February Keywords: HFCVD Nano-crystalline diamond ﬁlm Cemented carbide Substrate pretreatment abstract.
Nano and Micro Engineered Membrane Technology, vol. 10 Author: Stillwell Publisher: Stillwell © ISBN: ; Nano and Micro-Crystalline Diamond Films and Powders Author: Ligatchev, Valeri Publisher: Ligatchev, Valeri © ISBN: . Nano-crystalline diamond (NCD) films with good adhesion were deposited on flexible copper substrate with Ni interlayer by Microwave Plasma Chemical Vapor Deposition (MPCVD). In this paper, two-stage method was used to improve the adhesion between the copper substrates and the diamond films. The effect of deposition time of the first stage on the morphology, crystal structure, non-diamond Author: Xing Rui Li, Xin Wei Shi, Ning Yao, Xin Chang Wang.
Synthetic diamond can be achieved in the form of thin and thick films using experimental chemical vapor deposition (CVD) methods. Cemented tungsten carbide (WC–Co) is the commonly used tool material with high hardness (~18 GPa) and high elastic modulus (~ GPa) and, also compatible to the growth of synthetic diamond films. UNCD, a form of nanocrystalline diamond, captures many of the best properties of natural diamond in a scalable thin film technology that enables diamond to be integrated into a wide range of products. UNCD is the term that encompasses a proprietary family of materials that are manufactured using patented chemical vapor deposition processes.
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ISBN: OCLC Number: Description: viii, 92 pages: illustrations ; 23 cm: Contents: Conventional methods of films deposition and powders synthesis --Effects of deposition techniques and regimes on morphology of diamond films --Morphological features of synthetic diamond nano-powders --Morphology and feature of electron spectrums of crystalline diamond films.
Nano- and micro-crystalline diamond films and powders. New York: Nova Science Publishers, © (DLC) (OCoLC) Material Type: Document, Internet resource: Document Type: Internet Resource, Computer File: All Authors / Contributors: Valeri Ligatchev.
Nano- and micro-crystalline diamond films and powders exhibit a plethora of unique optical, electrical, photoelectrical, thermal and mechanical properties, which make these materials to be a choice for various applications: from the traditional jewellery industry to prospective particle detectors in high-energy physics and sophisticated quantum : Valeri Ligatchev.
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The preparation of nano-crystalline diamond films lies in: 1, the increase of the growth of nucleation density; 2, a very high secondary nucleation rate to suppress the growth of diamond nuclei and obtain films with nanometer-sized by: 8.
Nano-crystalline diamond films can be deposited in argon and methane environment by microwave plasma chemical vapor deposition. In the processing, the critical factors are: first, the glass substrate must be pretreated by fine diamond powder grinding; second, the processing parameters must be by: 2.
Nano- (NDC) and micro-crystalline Diamond Coatings (MDC) were deposited by HFCVD onto untreated and Fluidized Bed (FB) treated Cr/CrN interlayers. NDCs, characterized by a cauliflower-like morphology, showed improved wear by: In Fig. 1 the nm Raman spectra of nano-diamond powder, a NCD film on a Si substrate, and a micro-crystalline diamond film on an AlN substrate are compared.
All three spectra show the diamond line at approximately cm −1 and both diamond films show broad D- and G-bands of disordered sp 2 by: This explains the higher strength of NCDF in comparison with microcrystalline diamond foil.
By contrast, the strength of the NS is less dependent on the growth conditions and therefore it is similar for micro-crystalline diamond foil and NCDF. Here, the supergrain boundaries act as the crack origin (figure 14 c).Cited by: 6. and contacts between a few nano-grains can hold a micrometer-sized cluster attached to a substrate (Iakoubovskii et al., ).
toxic to a variety of cells through mitochondrial function (MIT) Fig 5: Detonation diamond as powder (a), as unstable suspension in water (center) and as completely deagglomerated dispersion in water (b). Diamond films are grown on Si substrate by microwave plasma CVD using CH 4 +H 2 (for undoped) and additive N 2 (for nitrogen-incorporated) with/without O 2 as precursors.
Crystal structures for grown films, such as micro- and nano-crystalline and surface morphologies are characterized in terms of growth condition by Raman and field-emission SEM, by: In contrast, the gas flow rate of methane and hydrogen for sub-micro-crystalline diamond films was optimized at 6 and sccm and for micro-crystalline diamond films at 2 and sccm, respectively.
Prior to film deposition, the substrates were scratched using μm and 5 nm diamond powders in a polisher for 10 min in by: SEM images of nano-crystalline diamond films under different deposition pressure (P1.
1 kPa, P2. kPa, P3. 2 kPa, P4. kPa, P5. 3 kPa) Figure 5 is Raman spectra of diamond films. synthesized different diamond films with the pressure varying from 5 to kPa (atmospheric pressure). The results indicated that the higher quality and growth rate of diamond films were obtained at atmospheric pressure.
WEI et al  studied the effect of temperature on nano-crystalline diamond films on WC−13% Co (mass. Nano- and micro-crystalline diamond growth by MPCVD in extremely poor hydrogen uniform plasmas Article in Diamond and Related Materials 16(4) April with 18 Reads How we measure 'reads'.
In this case, from the point of view of the spheres (e.g., nm or 1 μm), the diamond surface is smooth and uniform enough (e.g., nano- and ultrananocrystalline diamond films with rms roughness Author: Mária Domonkos, Pavel Demo, Alexander Kromka.
Since the low surface roughness, the free-standing nano-crystalline diamond films have high optical transmittance of ∼70% from to nm, about 5%. Synthesis of ultra-nano-crystalline and micro-crystalline composite diamond (UNCD/MCD) films and lateral emitters comprising UNCD/MCD were grown by using microwave plasma-enhanced chemical vapor deposition (MPECVD).
The field emission properties of UNCD/MCD films and lateral emitter devices made by UNCD/MCD were investigated. Books Advanced Search Amazon Charts Best Sellers & more Top New Releases Deals in Books School Books Textbooks Books Outlet Children's Books Calendars & Diaries 4 results for Books: Valeri Ligatchev.
Four different catalysts, nanodiamond seed, nano-Ni, diamond powder, and mixture of nano-Ni/diamond powder, were used to activate Si wafers for diamond film growth by hot-filament CVD (HFCVD). Diamond crystals were shown to grow directly on both large diamond powder and small nanodiamond seed, but a better crystallinity of diamond film was observed on the Cited by: 6.
The carbon science and technology has developed extensively in the last few decades due to discoveries of various poly-crystalline and nano-crystalline diamond film .Natural nanodiamond aggregates from the Popigai crater, Siberia, Russia. Internal structure of the Popigai nanodiamonds.
Internal structure of synthetic nanodiamonds. Nanodiamonds or diamond nanoparticles (medical use) are diamonds with a size below 1 micrometre. They can be produced by impact events such as an explosion or meteoritic impacts. The substrate material of dimension 80 × × 2 mm has been used to develop carbon based composite 1 represent the chemical composition of steel substrate.
The coating materials used were carbon powder, NiCr, Mo and Cr 3 C 2 powders. Initially 40 wt% carbon, 20 wt% NiCr, 20 wt% Mo and 20 wt% Cr 3 C 2 powders were blend together Author: Ankit Tyagi, S M Pandey, Kalpna Gupta, R S Walia, R S Walia, Qasim Murtaza, Kumar Krishen.