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Characterization of the Diamond-like Carbon Based Functionally Gradient Film
Characterization of the Diamond—like Carbon based Functionally Gradient Film

Feng MA,Xun CAI,Gang LI,Qiulong CHEN,Hongtao MA,

材料科学技术学报 , 2002,
Abstract: Diamond-like carbon coatings have been used as solid lubricating coatings in vacuum technology for their good physical and chemical properties. In this paper, the hybrid technique of unbalanced magnetron sputtering and plasma immersion ion implantation (Plll) was adopted to fabricate diamond-like carbon-based functionally gradient film, N/TiN/Ti(N,C)/DLC, on the 304 stainless steel substrate. The film was characterized by using Raman spectroscopy and glancing X-ray diffraction (GXRD), and the topography and surface roughness of the film was observed using AFM. The mechanical properties of the film were evaluated by nano-indentation. The results showed that the surface roughness of the film was approximately 0.732 nm. The hardness and elastic modulus, fracture toughness and interfacial fracture toughness of N/TiN/Ti(N,C)/DLC functionally gradient film were about 19.84 GPa, 190.03 GPa, 3.75 MRa.m1/2 and 5.68 MPa.m1/2, respectively. Compared with that of DLC monolayer and C/TiC/DLC multilayer, this DLC gradient film has better qualities as a solid lubricating coating.
Mechanical and tribological properties enhancement of heat treated AISI 4340 steel by using a TiN/TiAlN multilayer coating system
Bejarano,Gilberto; Caicedo,Julio; Mu?oz Salda?a,Juan;
Revista Facultad de Ingeniería Universidad de Antioquia , 2008,
Abstract: tin/tialn (titanium nitride/titanium aluminum nitride) multilayer were deposited by d.c. reactive magnetron sputtering using titanium and aluminum targets with 10 cm in diameter and 99.9% purity in an argon/nitrogen (ar/n) atmosphere, applying a substrate temperature of 300°c and a pressure of 7x10-3 mbar. silicon (100) and heat treated aisi 4340 steel samples with a hardness of 54 rockwell c (hrc, approximately 5.4 gpa) were utilized as substrate. tin/tialn coatings with 70% aluminum and 4 μm total thickness were investigated as function of multilayer number and their mechanical and tribological properties compared to the uncoated steel samples. the crystalline structure of the coated samples was analyzed through x-ray diffractometry and its morphology and topography using scanning electron microscopy (sem) and atomic force microscopy (afm). hardness was determined by means of nanoindentation, while wear resistance was characterized through pin on disc measurements. a hardness and young modulus increment from 62% and 70% respectively, were obtained for 150 multilayer of tin/tialn related to 30 bilayers and from 740% and 202% respectively, compared with the uncoated aisi 4340 steel samples. finally the friction coefficient was reduced from 0.55 down to 0.20 and the roughness from 63 nm to 3.2 nm for the steel samples coated with 150 bilayers of tin/tialn, what conduced to a greater wear resistance of the coating system.
Performant DLC Films with Enhanced Wear Resistance  [cached]
Costinescu L.,Munteanu D.,Cojocariu C.,Marin A.
Proceedings of the International Conference Nanomaterials : Applications and Properties , 2012,
Abstract: Diamond-like Carbon (DLC) coatings represent an interesting research subject for various groups of researchers having interests in surfaces tribology and corrosion. This paper discusses issues relating to the friction - wear and mechanical behaviour, for 4 types of DLC coating systems deposited on heat treatable steel hardened and high-tempered (a multilayer of WC/C (a-C:H:W); CrN+a-C:H, a single layer of a-C:H, plasma nitriding + Si doped DLC (PN+Si-a-C:H). These films were synthesized using a single or a combined process consisting in either r. f. reactive magnetron sputtering or/followed by Plasma Assisted Chemical Vapour Deposition (PACVD). The tribological properties (friction coefficient and wear resistance) were obtained and discussed in correlation with the mechanical properties (the adherence, the nanoindentation hardness) and thickness.
Deposition and Characterization of Multilayer DLC/BN Films  [PDF]
Honei Chin, Chavin Jongwannasiri, Shuichi Watanabe
Materials Sciences and Applications (MSA) , 2017, DOI: 10.4236/msa.2017.810053
Abstract: In this article, the results obtained from a study on multilayer diamond-like carbon and boron nitride (DLC/BN) films are reported. The microstructure, atomic concentration, hardness and friction coefficient of the films were characterized using transmission electron microscopy, auger electron microscopy, nano-indentation measurements and ball-on-disk friction testing. The effects of bilayer thickness and substrate bias on film growth were investigated. All multilayer films showed alternate DLC and BN layers, except the 2- and 4-nm bilayer of multilayer DLC/BN films deposited without substrate bias. Although the layers were very thin, each layer was distinguishable. This was confirmed by the use of TEM imaging and AES measurements. The hardness values of all the multilayer films were lower than those measured for the monolayer DLC and BN films. However, the hardness can be altered with a change in the bilayer thickness. Furthermore, in the case of the films deposited with substrate bias, multilayer DLC/BN films showed an improvement in wear resistance compared to monolayer DLC and BN films. Thus, the deposition of multilayer DLC/BN films can be considered to be beneficial in prolonging the service life of the surface.
JIN Zhujing YU Li DAI Shaoxia YU Zhiming Institute of Corrosion,Protection of Metals,Academia Sinica,Shenyang,China Institute of Corrosion,Protection of Metals,Academia Sinica,Wencui Road,Shenyang,China,
JIN Zhujing YU Li DAI Shaoxia YU Zhiming Institute of Corrosion and Protection of Metals
,Academia Sinica,Shenyang,China Institute of Corrosion and Protection of Metals,Academia Sinica,Wencui Road,Shenyang,China

金属学报(英文版) , 1989,
Abstract: The adhesion between the ion plated TiN coating and the base metal is improved by adding Y.The machenism of the effect of Y has been discussed as well.

JIN Zhujing,YU Li,DAI Shaoxia,YU Zhiming Institute of Corrosion,Protection of Metals,Academia Sinica,Shenyang,

金属学报 , 1989,
Abstract: The adhesion between the ion plated TiN coating and the base metalis improved by adding Y. By means of SEM, EPMA and X-ray diffraction analy-sis, the behaviour of Y in coating has been studied. The machenism of the effectof Y has been discussed as well.
Daniel Tischler,Zuzana Budinská,Petr Vl?ák,Ivo ?těpánek
Materials Engineering , 2011,
Abstract: In this report the effects of the substrate on the microhardness of Diamond like carbon (DLC) thin films were investigated. The DLC coatings were deposited by Radio Frequency Plasma Actived Chemical Vapor Deposition (RF PACVD; 13,56 MHz) process on three mechanically polished substrates, which were chosen for comparison; hardened molybdenum high speed steel AISI M2, unhardened tool steel AISI L2 and titanium alloy TiAl6V4. The aim of the present investigation was to determine the influence of substrates on microhardness and other mechanical properties of DLC layer. These properties especially microhardness were studied and compared from nanoindentation load – displacement curves. Results show that the hardness of the substrate is the crucial value for the hardness of the DLC films.
The Effect of Nitrogen Gas Flow Rate on the Cr-Containing DLC (Diamond-Like Carbon) Coating by AEGD Hybrid-CVD Coating Process  [PDF]
Yong-Ki Cho, Jae-Hoon Lee, Masahiro Okumiya, Sang-Gweon Kim
Advances in Materials Physics and Chemistry (AMPC) , 2017, DOI: 10.4236/ampc.2017.75016
Abstract: The development of electric and hybrid automobiles has gained momentum with the growth of interest in the field of miniaturization of electrode materials. In particular, technologies that improve the electrical property of stainless steel, while maintaining corrosion resistance, are gaining interest in terms of maintaining specific resistivity. The study on metal doping in diamond-like carbon coating is currently in progress to enhance the characteristics of conductivity and corrosion resistance with excellent properties such as corrosion resistance and lubrication coating. It is the process of using Cr arc with DLC coating to actuate AEGD. The change of I(D)/I(G) (Graphite peak (G) and disordered bond peak (D)) ratio and G-peak position in Cr-containing DLC film causes graphitization and thus lowers the basic electric resistance. Simultaneous input of nitrogen gas leads to deposition of CrN by a specific ratio of Cr and N in the DLC coating, and the nitrogen atoms replace hydrogen in bonding to increase the sp3 bond structure in the DLC film, in which CrN is not deposited, to result in specific resistivity of a specific value or less.
Electrochemical Corrosion Behavior of the DLC Coated and Uncoated NiTi Alloys
Jiehe SUI,Wei CAI,Liancheng ZHAO,

材料科学技术学报 , 2006,
Abstract: A dense and well-adhered diamond-like carbon(DLC)coating was prepared on the nickel-titanium(NiTi)alloys by plasma immersion ion implantation and deposition(PⅢD). Potentiodynamic polarization tests indicated the corrosion resistance of the NiTi alloys was markedly improved by the DLC coating. The Ni ions release of the NiTi alloys was effectively blocked by the DLC coating.
Review of the multilayer coating model  [PDF]
Takayuki Kubo,Yoshihisa Iwashita,Takayuki Saeki
Physics , 2014,
Abstract: The recent theoretical study on the multilayer-coating model published in Applied Physics Letters [1] is reviewed. Magnetic-field attenuation behavior in a multilayer coating model is different from a semi-infinite superconductor and a superconducting thin film. This difference causes that of the vortex-penetration field at which the Bean-Livingston surface barrier disappears. A material with smaller penetration depth, such as a pure Nb, is preferable as the substrate for pushing up the vortex-penetration field of the superconductor layer. The field limit of the whole structure of the multilayer coating model is limited not only by the vortex-penetration field of the superconductor layer, but also by that of the substrate. Appropriate thicknesses of superconductor and insulator layers can be extracted from contour plots of the field limit of the multilayer coating model given in Ref.[1].
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