Microstructure and mechanical properties of boron carbide thin films

Han, Zhizhong; Li, Geyang; Tian, Jiawan; Gu, Mingyuan

doi:10.1016/s0167-577x(02)00892-3

Cited by 58 publications

(32 citation statements)

References 9 publications

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“…This type of morphology is consistent with a "zone 1/zone T" structure model proposed by Thornton 16 and is also consistent with data on sputtered B 4 C films presented in earlier literature. [16][17][18] X-ray photoelectron spectroscopy on a B 4 C film aged for about 1 month indicated that the top 9 nm of the film is oxygen and carbon rich ͑64% B, 22% C, and 13% O, atomic͒ with the oxygen and carbon concentrations rapidly diminishing with depth from the top surface. Rutherford backscattering ͑RBS͒ measurements across the entire B 4 C film thickness indicated atomic ratio of boron-to-carbon= 3.7 ͑near perfectly stoichiometric͒, with 6% oxygen present, believed to come from the B 4 C sputtering target.…”

Section: Wavelength Dependence Of the Damage Threshold Of Inorganic Mmentioning

confidence: 99%

Wavelength dependence of the damage threshold of inorganic materials under extreme-ultraviolet free-electron-laser irradiation

Hau‐Riege¹,

London²,

Bionta³

et al. 2009

Applied Physics Letters

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We exposed bulk SiC and films of SiC and B4C to single 25 fs long free-electron-laser pulses with wavelengths between 13.5 and 32 nm. The materials are candidates for x-ray free-electron laser optics. We found that the threshold for surface-damage of the bulk SiC samples exceeds the fluence required for thermal melting at all wavelengths. The damage threshold of the film sample shows a strong wavelength dependence. For wavelengths of 13.5 and 21.7 nm, the damage threshold is equal to or exceeds the melting threshold, whereas at 32 nm the damage threshold falls below the melting threshold.

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Section: Wavelength Dependence Of the Damage Threshold Of Inorganic Mmentioning

confidence: 99%

Wavelength dependence of the damage threshold of inorganic materials under extreme-ultraviolet free-electron-laser irradiation

Hau‐Riege¹,

London²,

Bionta³

et al. 2009

Applied Physics Letters

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“…Boron carbide (B 4 C) is the third hardest material after diamond and boron nitride at room temperature and its hardness is retained at high temperatures [1,2]. B 4 C possesses unique physical and thermal properties such as high elastic modulus, high melting point, good chemical stability and high neutron absorption cross section.…”

Section: Introductionmentioning

confidence: 99%

Formation mechanism of B4C–TiB2–TiC ceramic composite produced by mechanical alloying of Ti–B4C powders

Rafiei

Salehi

Shamanian

2014

Advanced Powder Technology

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“…CrN has proven to be suitable to serve as a piston ring coating [6]. B 4 C, a well-known ceramic coating, has a very high hardness of about 35-45 GPa [7][8].…”

Section: Introductionmentioning

confidence: 99%

Tribological performance of three advanced piston rings in the presence of MoDTC-modified GF-3 oils

Zhao

et al. 2005

Tribol Lett

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The piston assembly (piston ring and cylinder bore) is one of the key parts of the internal combustion (IC) engine. Its performance will directly determine the performance of the whole engine. The piston assembly's tribological performance will be influenced by both its mechanical properties and the tribochemical interactions that take place on their surfaces. In this paper, three kinds of advanced stainless steel piston rings with a single nitrided layer, CrN coating on the nitrided layer and a B 4 C and CrN binary-layer coating on the nitrided layer, respectively, were employed. Their frictional behavior and wear performance, when sliding against the cast iron cylinder bore materials lubricated with two kinds of GF-3 category mineral-based engine oils (one of them blended with MoDTC friction modifier), were investigated on a SRV tribotester. The test conditions were set and maintained to simulate engine-operating conditions. SEM (Scanning Electron Microscopy) and EDX (Energy Dispersive X-ray spectroscopy) were employed to characterize the morphology and elemental composition of the wear tracks. Tribotests and analysis results indicate that changes in both the mechanical properties of the tribomate (piston coatings) and tribochemical interactions (formulation of engine oils) have an impact on the tribological performance of the piston assembly. Tribochemical interactions will have a more obvious influence on friction coefficients while the mechanical properties of the tribomate have a more obvious influence on wear.

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Microstructure and mechanical properties of boron carbide thin films

Cited by 58 publications

References 9 publications

Wavelength dependence of the damage threshold of inorganic materials under extreme-ultraviolet free-electron-laser irradiation

Wavelength dependence of the damage threshold of inorganic materials under extreme-ultraviolet free-electron-laser irradiation

Formation mechanism of B4C–TiB2–TiC ceramic composite produced by mechanical alloying of Ti–B4C powders

Tribological performance of three advanced piston rings in the presence of MoDTC-modified GF-3 oils

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