Improving Pressure–Velocity Limit of Mechanical Seal with Polycrystalline Diamond Coating

Guo, Daidong; Cai, Ningning; Wu, Guoping; Xie, Fangmin; Tan, Shuang‐Jie; Jiang, Nan; Li, He

doi:10.3390/app10176090

Cited by 8 publications

(6 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The dry tribological performance tests of NCD were conducted on a high-speed end-face friction and wear testing machine at room temperature, as shown in Figure 1 a, the details of this set up were shown in our former work [ 28 ]. As shown in Table 1 , dry tribological tests were divided into two groups: Group 1: dry tribological performance was tested at 500, 1000, 1500 and 2000 rpm rotational speed at fixed normal load of 100 N; Group 2: the dry tribological performance was tested at 100, 150, 200 and 250 N normal load at a fixed rotational speed of 1000 rpm.…”

Section: Methodsmentioning

confidence: 99%

“…The results show that the COF of NCD is 0.02–0.03 after the running-in regime and the limit normal load of wear tests depends on the surface roughness of substrate. Although diamond-coated mechanical seals have made great progress after years of development and research [ 28 , 29 , 30 ], there is little research on the dry tribological properties.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dry Friction Properties of Diamond-Coated Silicon Carbide

Xie²,

Wang³

et al. 2023

Materials

Self Cite

View full text Add to dashboard Cite

Dry friction between seal faces, caused by unstable or extreme operating conditions, significantly affects the running stability and service life of mechanical seals. Therefore, in this work, nanocrystalline diamond (NCD) coatings were prepared on the surface of silicon carbide (SiC) seal rings by hot filament chemical vapor deposition (HFCVD). The friction test results under dry environment reveals that the coefficient of friction (COF) of SiC–NCD seal pairs is about 0.07–0.09, which were reduced by 83–86% compared to SiC–SiC seal pairs. The wear rate of SiC–NCD seal pairs is relatively low, ranging from 1.13 × 10−7 mm3/N·m to 3.26 × 10−7 mm3/N·m under different test conditions, which is due to the fact that the NCD coatings prevent adhesive and abrasive wear between the SiC seal rings. The analysis and observation of the wear tracks illustrate that the excellent tribological performance of the SiC–NCD seal pairs is due to a self-lubricating amorphous layer formed on the worn surface. In conclusion, this work highlights a pathway to enable mechanical seals to satisfy the high application requirements under highly parametric working conditions.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dry Friction Properties of Diamond-Coated Silicon Carbide

Xie²,

Wang³

et al. 2023

Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…The second article [2] focuses on polycrystalline diamond (PCD) coated mechanical sealing rings, which were prepared by hot filament chemical vapor deposition (HFCVD) on graphite loaded silicon carbide (GSiC) substrates using incandescent filament.…”

Section: The Published Articlesmentioning

confidence: 99%

Obtaining, Characterization and Applications of Advanced Materials

Sandu

2023

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…With the increasing demand for improved contact mechanical seal end face performance, mechanical seal end face surface modification technology has been widely used, and composite coatings in high-parameter condition mechanical seals have made significant progress in research [1][2][3][4]. The composite coating is essential to improve the seal end face's stability and wear resistance and to extend the mechanical seal's life [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Friction and Wear Characteristics of Cr-CNTs Composite Coating End Faces of High-Temperature Mechanical Seals

Yang,

Li,

et al. 2023

Coatings

View full text Add to dashboard Cite

To improve the reliability of the end faces of high-temperature mechanical seals, a high-performance composite material that introduces carbon nanotubes (CNTs) into the laser-melted Cr coating is proposed. In this study, for high-temperature and high-speed mechanical seals under actual working conditions, friction and wear tests were conducted under different working conditions and using different end face materials. The high-temperature tribological properties of the Cr-CNTs coatings were analyzed, and the strengthening mechanism of the Cr-CNTs coatings on end faces was investigated. The results indicate that the wear resistance of the Cr-CNTs coating at high temperatures is first enhanced and then weakened with the increase in the CNTs content. The composite coating end face performance is optimal when the CNTs content is 10 wt%. The presence of CNTs between the end faces when grinding against the graphite ring favors the generation of a graphite film. The coefficient of friction of the Cr-CNTs coating is reduced by at least 12.46% compared to the Cr coating at a temperature of 483 K. This study provides reference examples for the application of carbon nanotubes in high-performance mechanical seals and new research ideas for improving the performance of mechanical seal end faces.

show abstract

Improving Pressure–Velocity Limit of Mechanical Seal with Polycrystalline Diamond Coating

Cited by 8 publications

References 23 publications

Dry Friction Properties of Diamond-Coated Silicon Carbide

Dry Friction Properties of Diamond-Coated Silicon Carbide

Obtaining, Characterization and Applications of Advanced Materials

Friction and Wear Characteristics of Cr-CNTs Composite Coating End Faces of High-Temperature Mechanical Seals

Contact Info

Product

Resources

About