Tribological Characteristics of SiC Ceramics in High‐Temperature and High‐Pressure Water

Low friction and low wear of SiC sliding against itself in water at room temperature have been well reported in the past 20 years, and some practical applications have been developed. However, the properties of friction and wear in pure, deionized or distilled water have been mainly observed and not in water from sources in nature. In this article, the fundamental properties of friction and wear between SiC ball and disk are observed in water from ground, river, and sea, and the results are compared with those in deionized water in the viewpoints of modes of lubrication and wear and the resultant values of friction coefficient and wear rate. The smallest friction coefficient (l ' = 0.005) in steady state is observed in deionized water and the largest (l ' = 0.013) in sea water. The smallest wear rate (w s = 2.2 9 10 -7 mm 3 / Nm) is observed in sea water and the largest (w s = 3.1 9 10 -7 mm 3 /Nm) in deionized water. The intermediate values of l ' and w s between the smallest and the largest ones are observed in ground and river water. The modes of lubrication and wear, which generated observed values of l ' and w s , are considered as mixed lubrication and tribochemical wear. The chemical elements of Na, Cl, Mg, and K in sea water observed on wear particles and pits are thought effective to generate the largest value of l ' and the smallest value of w s .

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“…The reaction process of generating SiO 2 is considered by Kitaoka et al [13] and Chen et al [12] as follows:…”

Section: Wear Modementioning

confidence: 99%

Friction and Wear Properties of Silicon Carbide in Water from Different Sources

2011

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“…Kitaoka et al [7,8] have proposed a reaction mechanism for Sibased ceramics sliding on themselves under 120 • C in water:…”

Section: Mechanism Of Materials Removal By Tribochemical Polishingmentioning

confidence: 99%

“…Si-based ceramics (SiC, Si 3 N 4 ) especially have been widely used in engineering components for which wear resistance is strongly demanded. The friction and wear behaviors of advanced ceramics sliding on themselves under different conditions have been studied by several investigators [1][2][3][4][5][6][7][8][9][10]. In a dry atmosphere (air or argon), cracking and grain pullout dominated the wear behaviors of advanced ceramics, which results in a roughening of the rubbing surfaces and some microscratches on the worn surface.…”

Section: Introductionmentioning

confidence: 99%

A study on surface polishing of SiC with a tribochemical reaction mechanism

Lin

Kao

2004

AMT

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This work investigates the surface polishing of silicon carbide SiC using the tribochemical reaction mechanism. Different metal discs -cast iron, AISI 304 stainless steel, S45C medium carbon steel plated chromium, brass and copper -are used to polish SiC in water and kerosene, respectively. The experimental results show that ferrous metal discs can effectively polish SiC in water. Also, no surface damage or scratches on the polished surface of SiC are observed by this method. The polishing debris was analyzed by electron spectroscopy for chemical analysis. The analyzed results indicate that the polishing surface of SiC is removed tribochemically with the aid of catalytic effect of iron oxide. Moreover, in this process the maximum material removal rate is about 0.06 µm/h.

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“…A large amount of experimental research work [1][2][3][4][5][6][7] has been done to investigate the friction and wear properties of ceramics, such as alumina and silicon carbide under different temperature [5], environmental media [6], and surface topography [7]. The conventional types of tribometer of pin-on-disk, roller on disk or plate on plate technique are usually used to carry out the friction test along unidirection or reciprocation.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Friction of SiC Surfaces: A Torsional Kolsky Bar Tribometer Study

Huang

Feng

2007

Tribol Lett

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A dynamic tribometer has been successfully developed utilizing torsional Kolsky bar (TKB) technique for tribo pairs subjected to dynamic compression and shear. The dynamic tribometric responses of ground finish (R a = 0.17 lm) and polished finish (R a = 0.10 lm) surfaces of silicon carbide (SiC) under compression loading up to 1.5 GPa and shear-sliding velocity to 3.8 m/s have been measured. The experimental results show Coulomb friction behavior. Hardening of shear response is found on both the ground and polished surfaces. Repeating tests on the same tribo-pair demonstrate that steady state shear response on polished surfaces can be achieved by cumulating shear-sliding distance. SEM observation of the tested surface shows that the tested surfaces are microscopically shear-damaged. The similar surface conditions after a relative longer shear-sliding distance on polished surfaces lead to the same steady state frictional coefficient, 0.61, for both finishing surfaces.

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Tribological Characteristics of SiC Ceramics in High‐Temperature and High‐Pressure Water

Cited by 44 publications

References 8 publications

Friction and Wear Properties of Silicon Carbide in Water from Different Sources

Friction and Wear Properties of Silicon Carbide in Water from Different Sources

A study on surface polishing of SiC with a tribochemical reaction mechanism

Dynamic Friction of SiC Surfaces: A Torsional Kolsky Bar Tribometer Study

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