Characterization and wear behavior of modified silicon nitride

Carrasquero, Edwuin; Bellosi, A.; Staia, M.H.

doi:10.1016/j.ijrmhm.2005.06.004

Cited by 38 publications

(20 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Also, friction curves of other coatings have the same trend, i.e. starting at a relatively low level of friction coefficient value, increasing to a peak and then achieving a steady state value, which is consistent with the reports of Carrasquero et al [18] and Liu et al [19]. Additionally, it can be seen that brittle fracture (Fig.…”

Section: Tribological Propertiessupporting

confidence: 90%

Tribological properties of rare earth oxide added Cr3C2–NiCr coatings

Zhang

Luo

2007

Applied Surface Science

View full text Add to dashboard Cite

Section: Tribological Propertiessupporting

confidence: 90%

Tribological properties of rare earth oxide added Cr3C2–NiCr coatings

Zhang

Luo

2007

Applied Surface Science

View full text Add to dashboard Cite

“…Si 3 N 4 -based ceramics are widely applied in sealing parts, engine parts, and high-speed cutting tools, largely because of their high hardness, excellent chemical and mechanical stability, high specific stiffness, heat resistance [1][2][3][4][5]. Particularly, the Si 3 N 4 -BN material possesses a set of unique properties, namely, low oxidizability and good machinability with relatively high physicomechanical characteristics [6].…”

Section: Introductionmentioning

confidence: 99%

Tribochemical Behavior of Si3N4–hBN Ceramic Materials with Water Lubrication

Chen

Gao

et al. 2009

Tribol Lett

View full text Add to dashboard Cite

The main objective of this article is to study the tribological behavior of Si 3 N 4 -hBN composites with different hexagonal boron nitride (hBN) volume fraction under distilled water lubrication. Water-lubricated sliding tests were carried out on a pin-on-disc tester, and Si 3 N 4 was used as friction pair. The results showed that the addition of hBN to Si 3 N 4 resulted in a severe decrease of the friction coefficient, from 0.35 for Si 3 N 4 against Si 3 N 4 to 0.01 for Si 3 N 4 -20% hBN against Si 3 N 4 with drip-feed water lubrication; the friction coefficients of Si 3 N 4 -hBN/ Si 3 N 4 pairs sliding with full immersion water lubrication were as low as 0.01. The morphological and chemical characterization of the worn surfaces were conducted using scanning electron microscopy (SEM), laser scanning microscope, X-ray photoelectron spectroscopy (XPS). The analysis indicated that, with drip-feed water lubrication, hBN in Si 3 N 4 -hBN was spalled off during the wearing tests and spalling pits were formed on the wearing surface of Si 3 N 4 -hBN composites, then the wear debris were dropped into the pits and reacted with water, and thus a tribochemical film was formed on the wearing surface. The tribochemical film facilitated the wear surfaces of Si 3 N 4 -hBN and Si 3 N 4 to smooth with drip-feed water lubrication, while the tribochemical remove facilitated the wear surfaces to smooth with full-immersion water lubrication.

show abstract

“…At the start stage, point contact occurs between tungsten carbide ball and coatings for some time, so the friction curves increase firstly, then decrease, and stabilize at some value, which is consistent with the reports by refs. [16,17]. While the sliding goes on, as the microhardness of sprayed coating attains a higher extent, the wear also occurs in the tungsten carbide ball and the surface polished layer of it is removed, which makes the contact surface coarse and the contact area bigger, so the contact between the tungsten carbide ball and the sprayed coating turns into surface contact, resulting in a higher friction coefficient and then achieving a steady stable friction coefficient value, as shown in Figure 6(b) and (c).…”

Section: Tribological Propertiesmentioning

confidence: 99%

Tribological properties of La2O3 and CeO2 doped CoCrW coatings deposited by supersonic plasma spraying

Zhang

2007

Chin. Sci. Bull.

View full text Add to dashboard Cite

A novel supersonic plasma spraying was used to prepare rare earth oxides doped CoCrW coatings. X-ray diffractometer, contact surface profiler, hardness tester, micro-friction and -wear tester and environmental scanning electron microscope equipped with energy dispersive X-ray spectroscopy were employed to investigate the phase structure, surface morphology, microhardness, friction and wear properties of the sprayed coatings. The results show that rare earth oxide doped coatings have high microhardness and excellent tribological properties. Furthermore, the friction and wear mechanisms of sprayed coatings are also discussed.supersonic plasma spraying, CoCrW coating, rare earth oxide, tribological property CoCrW coatings with high oxidation resistance [1] , hardness and wear resistance have been used in the aeronautical field [2,3] . In the literature, CoCrW coatings are usually prepared with high-velocity oxy fuel (HVOF) [1] , plasma spraying (PS) [4,5] , and vacuum melting method (VMM) [6] . While CoCrW coatings prepared with supersonic plasma spraying (SPS) have not been reported because SPS is a novel technology.Compared with HVOF, PS and VMM methods, SPS has higher process temperature (up to 10000℃) and gas velocity (600 m/s) [7] . As hot spraying coating properties and microstructure are principally determined by the temperature and velocity of the sprayed droplets when impinging on the substrate, SPS is promising to gain higher strength, hardness and lower porosity than those of HVOF, PS and VMM methods.In this study, a kind of rare earth oxide doped CoCrW coatings are prepared with this novel SPS method and the wear resistance at low load is presented.

show abstract

Characterization and wear behavior of modified silicon nitride

Cited by 38 publications

References 24 publications

Tribological properties of rare earth oxide added Cr3C2–NiCr coatings

Tribological properties of rare earth oxide added Cr3C2–NiCr coatings

Tribochemical Behavior of Si3N4–hBN Ceramic Materials with Water Lubrication

Tribological properties of La2O3 and CeO2 doped CoCrW coatings deposited by supersonic plasma spraying

Contact Info

Product

Resources

About