Effect of load on the friction and wear characteristics of Si 3 N 4 -hBN ceramic composites sliding against steels

Chen, Wei; Zhang, Da; Ai, Xu

doi:10.1016/j.ceramint.2016.12.084

Cited by 31 publications

(12 citation statements)

References 27 publications

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“…The detailed synthetization of Si 3 N 4 -hBN composite ceramics is presented somewhere else [16][17][18]. Generally, starting materials were ball milled, hot-press sintered at 30 MPa and 1800 • C, and also were cut into pins.…”

Section: Materials Prepared and Specimens Madementioning

confidence: 99%

“…In the case a B 4 C ceramic matrix after adding hBN, the friction coefficient lowered from 0.373 for the B 4 C/B 4 C tribopair to 0.005 for the B 4 C-20 wt% hBN/B 4 C tribopair in water lubricating condition [15]. In our previous research [16][17][18][19][20], we studied the tribological performances of Si 3 N 4 -hBN bearing on stainless steel at different sliding speeds and with a normal load. When the speed was 1.73 m/s and a load of 10N in dry friction conditions, the friction coefficient measured was around 0.12 for the Si 3 N 4 -10 vol% hBN/ASS (austenitic stainless steel) tribopair [16,17].…”

Section: Introductionmentioning

confidence: 99%

“…In our previous research [16][17][18][19][20], we studied the tribological performances of Si 3 N 4 -hBN bearing on stainless steel at different sliding speeds and with a normal load. When the speed was 1.73 m/s and a load of 10N in dry friction conditions, the friction coefficient measured was around 0.12 for the Si 3 N 4 -10 vol% hBN/ASS (austenitic stainless steel) tribopair [16,17]. However, in drip-feed water lubricating condition, the friction coefficient of Si 3 N 4 -20 vol% hBN decreased from 0.35 to 0.01 [18].…”

Section: Introductionmentioning

confidence: 99%

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Tribological Properties of Si3N4-hBN Composite Ceramics Bearing on GCr15 under Seawater Lubrication

et al. 2020

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This paper concerns a comparative study on the tribological properties of Si3N4-10 vol% hBN bearing on GCr15 steel under seawater lubrication and dry friction and fresh-water lubrication by using a pin-on-disc tribometer. The results showed that the lower friction coefficient (around 0.03) and wear rate (10−6 mm/Nm) of SN10/GCr15 tribopair were obtained under seawater condition. This might be caused by the comprehensive effects of hydrodynamics and boundary lubrication of surface films formed after the tribo-chemical reaction. Despite SN10/GCr15 tribopair having 0.07 friction coefficient in the pure-water environment, the wear mechanismsits were dominated by the adhesive wear and abrasive wear under the dry friction conditions, and delamination, plowing, and plastic deformation occured on the worn surface. The X-ray photoelectron spectroscopy analysis indicated that the products formed after tribo-chemaical reaction were Fe2O3, SiO2, and B2O3 and small amounts of salts from the seawater, and it was these deposits on the worn surface under seawater lubrication conditions that, served to lubricate and protect the wear surface.

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Section: Materials Prepared and Specimens Madementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Tribological Properties of Si3N4-hBN Composite Ceramics Bearing on GCr15 under Seawater Lubrication

et al. 2020

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“…The authors also found that the friction coefficient was not influenced by BN addition to Si 3 N 4 /BN composites. However, our previous research showed that Si 3 N 4 /BN composites (micro-sized) showed better tribological properties [10][11][12][13][14]. Especially, a lower friction coefficient (0.03) and wear rates of order 10 -6 were obtained for a sliding pair of Si 3 N 4 /BN composite and stainless steel, which is attributed to the formation of a self-lubricating film composed of SiO 2 , H 3 BO 3 and Fe 2 O 3 .…”

Section: Introductionmentioning

confidence: 94%

MICROSTRUCTURE, MECHANICAL PROPERTIES AND FRICTION/WEAR BEHAVIOR OF HOT-PRESSED Si₃N₄/ BN CERAMIC COMPOSITES

Chen¹

2018

Ceramics - Silikaty

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Nano-scale and micro-scale hexagonal boron nitride (hBN) powders, respectively, were added to silicon nitride (Si 3 N 4 ) matrix powder, and Si 3 N 4 /BN ceramic composites with different content of solid-lubrication hBN were produced by hot pressing. The combined effect of starting powder and hBN content on the microstructure, mechanical properties and tribological properties of Si 3 N 4 /BN ceramic composites has been studied. The results showed that the nano-sized starting powder was beneficial to the densification of Si 3 N 4 /BN ceramic composites, and resulted in a Si3N4/BN nano/nano ceramic composite with slightly higher density and improved mechanical properties compared to the corresponding micro/nano ceramic composite. The physical and mechanical properties of Si 3 N 4 -based ceramic composites were found to be affected by addition of BN. Increasing BN content led to a decrease of bulk density, hardness, bending strength and fracture toughness. On the other hand, the starting powder has no significant influence on the tribological properties of Si 3 N 4 /BN ceramic composites. The friction properties and wear resistance continuously improved with increasing BN content up to 20 vol. %, due to the formation of tribochemical film composed of H 3 BO 3 , SiO 2 and metal oxides.

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“…Our group has been devoted to the tribological research of Si 3 N 4 ceramic composites in various fields, and the developed Si 3 N 4 -hBN ceramic composites have certain practical functions in many fields [9][10][11][12][13][14][15][16][17] . However, in Si 3 N 4 -hBN ceramic composites, the binding capacity of hBN and ceramic matrix is poor, and excessive addition of hBN will cause the ceramic composites to lose their original high strength and high hardness.…”

Section: Introductionmentioning

confidence: 99%

Laminated Si3N4-Mo Composites Produced by Hot Pressing

Chen

Zhao

Wang

et al. 2020

Preprint

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In this paper, the physical, mechanical and friction behavior of Si3N4-Mo laminated composites were investigated. It can be found that the multilayer structure could improve the fracture toughness of laminated composite compared with pure Si3N4. Through the thermodynamic and kinetic calculations of chemical reactions, we conclude that the main product of the interface is Mo5Si3 which caused poor physical and mechanical properties of Si3N4-Mo layered ceramics. The higher content of Mo was beneficial to hinder the diffusion of cracks and improved the fracture toughness of the material, but with the lower content of Mo, Si3N4-Mo laminated ceramic composite had better tribology properity . In addition, with the increase of the load, the tribology properity of Si3N4-Mo laminated ceramic composite decreased, and the friction mechanism of Si3N4-Mo/TC4 is a mixed wear of adhesive wear and abrasive wear.

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Effect of load on the friction and wear characteristics of Si 3 N 4 -hBN ceramic composites sliding against steels

Cited by 31 publications

References 27 publications

Tribological Properties of Si3N4-hBN Composite Ceramics Bearing on GCr15 under Seawater Lubrication

Tribological Properties of Si3N4-hBN Composite Ceramics Bearing on GCr15 under Seawater Lubrication

MICROSTRUCTURE, MECHANICAL PROPERTIES AND FRICTION/WEAR BEHAVIOR OF HOT-PRESSED Si₃N₄/ BN CERAMIC COMPOSITES

Laminated Si3N4-Mo Composites Produced by Hot Pressing

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