Tribological behavior of silicon nitride materials under unlubricated sliding between 22°C and 1000°C

Skopp, A.; Woydt, Mathias; Habig, Karl‐Heinz

doi:10.1016/0043-1648(95)90173-6

Cited by 44 publications

(44 citation statements)

References 23 publications

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“…Aerosol spraying of additional H-BN to replace, in part, the H-BN preferentially removed during polishing process yielded modest reductions in friction coefficient. The coefficients obtained were typical of those for sintered Si 3 N 4 under dry sliding conditions, as have been reported by previous investigators [21,32].…”

Section: Discussionsupporting

confidence: 60%

“…Graphite and other solid lubricants have been incorporated into ceramic matrices in order to improve their tribological responses [19][20][21]. In particular, hexagonal boron nitride (H-BN) has been used extensively in ceramics as a solid lubricant due to its high lubricity and resistance to corrosion and oxidation to moderately high temperatures [22].…”

Section: Introductionmentioning

confidence: 99%

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Dry and oil-lubricated sliding wear of Si3N4 and Si3N4/BN fibrous monoliths

et al. 2005

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A high-temperature ball-on-flat tribometer was used to investigate dry and oil-lubricated friction and wear of sintered Si 3 N 4 and Si 3 N 4 /hexagonal boron nitride (H-BN) fibrous monoliths. The friction coefficients of base Si 3 N 4 flats sliding against Si 3 N 4 balls were in the range of 0.6-0.8 for dry and 0.03-0.15 for lubricated sliding, and the average wear rates of Si 3 N 4 were »10 )5 mm 3 N )1 m )1 for dry sliding and »10 )10 -10 )8 mm 3 N )1 m )1 for lubricated sliding. The friction coefficients of Si 3 N 4 balls against composite fibrous monoliths were »0.7 for dry sliding and 0.01-0.08 for lubricated sliding. The average specific wear rates of the pairs were of the same order as those measured for the conventional Si 3 N 4 pairs. However, the fibrous monoliths, in combination with sprayed dry boron nitride, resulted in reduction in the lubricated friction coefficients of the test pairs and significant reduction in their wear rates. The most striking result of this study was that the coefficients of friction of the Si 3 N 4 / H-BN fibrous monolith test pair were 70-80% lower than those of either roughened or polished Si 3 N 4 when tests were performed under oil-lubricated sliding conditions over long distances (up to 5000 m). The results indicated that Si 3 N 4 /H-BN fibrous monoliths have good wear resistance and can be used to reduce friction under lubricated sliding conditions.

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Section: Discussionsupporting

confidence: 60%

Section: Introductionmentioning

confidence: 99%

Dry and oil-lubricated sliding wear of Si3N4 and Si3N4/BN fibrous monoliths

et al. 2005

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“…This structure of hBN can easily be sheared along the basal plane of hBN, thus qualifying its role as a solid lubricant additive. There are several research investigations that report the role of hBN in reducing friction in various tribological applications [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Effect of laser post-treatment on Al2O3-TiB2-TiN composite coating with free hBN

Chatterjee

Majumdar

Shariff

et al. 2011

Int J Adv Manuf Technol

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The development of nanostructured, hard, and wear-resistant composite coating of Al 2 O 3 , TiB 2 , and TiN on low carbon steel (AISI 1025) substrate by combined self-propagating high-temperature synthesis (SHS) and laser surface alloying (LSA) has already been communicated in the author's previous publications. The coefficient of friction of the coating (with WC-Co as counterbody) is also found to have reduced substantially with the presence of free hexagonal boron nitride (hBN) in it. The occurrence of free hBN has been made possible by putting excess hBN in the precursor mixture which is supposed to undergo combined SHS and LSA. This has also been reported in one of the previous publications. This reduction in coefficient of friction is achieved at a cost of a marginal reduction in the microhardness as well as the specific wear rate as the free hBN in the coating matrix causes some softening. Laser posttreatment causes distinct enhancement in the microhardness and wear resistance of the coating while augmenting the favorable effect of free hBN on the coefficient of friction.

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“…The oxygen atoms incorporated therein may react with the Si 3 N 4 network forming silicon oxynitride or silicon oxide. Indeed, tribological properties ͑friction and wear rate͒ of monolithic Si 3 N 4 containing different crystalline phases were reported 45 showing that the friction coefficient and wear rate were reduced when surface layers, such as SiO 2 , and SiO x N y , were formed during tribological tests at 1000°C. However, when the tests were performed at 400°C, no reduction in the wear rate and friction coefficient was observed, since at this temperature no significant layer of silicon oxynitride or silicon oxide is formed, as shown in this work.…”

Section: Mechanical and Structural Properties Of Si 3 N 4 Films Amentioning

confidence: 99%

“…This should improve the solid lubricant effect of the silicon oxynitride layer in tribological applications at high temperatures, as reported for bulk Si 3 N 4 . 45 To confirm the hypothesis of silicon oxynitride formation during annealing, XPS measurements were performed to evaluate the N and Si chemical ambient in the annealed and as-deposited films. Figure 10͑a͒ at 1000°C ͑solid triangles͒.…”

Section: Mechanical and Structural Properties Of Si 3 N 4 Films Amentioning

confidence: 99%

Physicochemical, structural, and mechanical properties of Si3N4 films annealed in O2

Aguzzoli

Marin

Figueroa

et al. 2010

Journal of Applied Physics

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The physicochemical, structural, and mechanical properties of silicon nitride films deposited by radio frequency reactive magnetron sputtering were investigated before and after thermal annealing in 18 O 2 . As-deposited films were essentially amorphous, stoichiometric, and free from contaminants for a wide range of deposition parameters, with hardness figures ranging from 16.5-22 GPa, depending mainly on the deposition temperature. After 18 O 2 annealing at 1000°C, films hardness converged to 21 GPa, independently of the deposition temperature, which is explained based on the crystallization of the films at this annealing temperature. Moreover, oxygen is incorporated only in 7.5 nm of the Si 3 N 4 , forming silicon oxynitride at the top surface of the film, indicating a good oxidation resistance at high temperature. Finally, the elastic strain to failure ͑H 3 / E 2 ͒, which mimics the wear resistance of the film, doubles after the 1000°C annealing. These observations show the great potential of silicon nitride as a hard coating for high temperature applications.

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Tribological behavior of silicon nitride materials under unlubricated sliding between 22°C and 1000°C

Cited by 44 publications

References 23 publications

Dry and oil-lubricated sliding wear of Si3N4 and Si3N4/BN fibrous monoliths

Dry and oil-lubricated sliding wear of Si3N4 and Si3N4/BN fibrous monoliths

Effect of laser post-treatment on Al2O3-TiB2-TiN composite coating with free hBN

Physicochemical, structural, and mechanical properties of Si3N4 films annealed in O2

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