Frictional Properties of 3D Printing Polymers in Vacuum

Prozhega, M. V.; Reschikov, E. O.; Shirshov, A. D.; Yakovenko, N. G.

doi:10.3103/s1068366620060173

Cited by 9 publications

(2 citation statements)

References 5 publications

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“…Tribological tests were performed in accordance with ASTM G133 in reciprocating motion. The test bench is equipped with a vacuum chamber and a sample heating system [5]. The coefficient of friction was determined in vacuum (<10 -4 mbar), at a temperature 250 °C in the friction zone, the sample displacement amplitude was 5 mm, the frequency 30 min -1 , test duration 30 min, normal load 7 N. The ball specimen was a diameter of 6.35 mm made of steel 100Cr6.…”

Section: Methodsmentioning

confidence: 99%

The Technological Factors and Operating Conditions Influence on the Molybdenum Disulfide Coatings Tribological Properties

Prozhega,

Reschikov,

Konstantinov

2023

J. Mater. Eng.

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Molybdenum disulfide is a widely used solid lubricant operates successfully under extreme conditions such as vacuum, high or low temperatures, high loads etc. Magnetron sputtering is one of the most common method of application MoS2 coatings. It allows one to apply thin antifrictional films with high rate of purity on different substrates. The surface before application is usually prepared by abrasive processing. The aim of the work is to evaluate the magnetron deposition modes, substrate surface preparation, substrate roughness on the molybdenum disulfide coatings tribological properties. For the purpose mentioned a linearly reciprocating Ball-on-Flat (ASTM G133) Sliding Wear tests in vacuum (pressure less than 10-4 mbar) and high temperature (250 ¬¬¬0C) were conducted. The two different materials as a coating substrate was used (stainless steel and brass). The substrate surface was sandblasted. The coating surfaces structure after wear and chemical composition have been studied. The friction coefficient in vacuum at 250 °C was about 0.02–0.05. The least value was observed for the AISI 316L steel substrate treated by sandpaper and Ra 0.10 µm roughness coatings. The negative bias voltage (–20 V) during magnetron deposition leads to 16–42% lower coefficient of friction. Oxygen decreases the anti-friction properties.

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Section: Methodsmentioning

confidence: 99%

The Technological Factors and Operating Conditions Influence on the Molybdenum Disulfide Coatings Tribological Properties

Prozhega,

Reschikov,

Konstantinov

2023

J. Mater. Eng.

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“…Tribological tests in vacuum with sample heating were performed in a special facility developed at IMASH RAS and certified for testing in accordance with the ASTM G133 standard. Detailed description of the facility operation can be found in [20]. During the test, the pressure in the chamber, the temperature of the samples, and the friction coefficient were recorded.…”

Section: Tribological Testsmentioning

confidence: 99%

Estimation of MoS2 Coating Performance on Bronze and Steel in Vacuum at High Temperatures

et al. 2022

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We compared two modes of magnetron sputter deposition of MoS2 on substrates made of steel AISI 316L and bronze CuAl9NiFe4Mn1 with different initial roughness Ra 0.05–2.32 µm. The deposition was carried out at a bias voltage of −20 and +100 V, and the deposition rate of these modes differed by 30%. Measurements of the friction coefficient and lifetime tests were made in accordance with ASTM G133. Measurements of the friction coefficient and lifetime tests in vacuum at load 7H, temperature of samples 250 °C, and pressure in the chamber <10−6 Pa were carried out according to ASTM G133. The adhesive strength, the chemical composition of the coatings before and after tribological tests, the degree of crystallinity of the coatings, and the distance between the planes were evaluated. Mechanical and structural properties of coatings are discussed concerning the deposition mode parameters. The average coefficient of friction of the MoS2 coatings in steady-state friction did not exceed 0.051 for all samples. The influence of the sample pretreatment method on the growth of molybdenum disulfide crystals was revealed.

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Closing the loop in space 3D printing: Effect of vacuum, recycling, and UV aging on high performance thermoplastics produced via filament extrusion additive manufacturing

Ortega Varela de Seijas,

Piskacev,

Celotti

et al. 2024

Acta Astronautica

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Frictional Properties of 3D Printing Polymers in Vacuum

Cited by 9 publications

References 5 publications

The Technological Factors and Operating Conditions Influence on the Molybdenum Disulfide Coatings Tribological Properties

The Technological Factors and Operating Conditions Influence on the Molybdenum Disulfide Coatings Tribological Properties

Estimation of MoS2 Coating Performance on Bronze and Steel in Vacuum at High Temperatures

Closing the loop in space 3D printing: Effect of vacuum, recycling, and UV aging on high performance thermoplastics produced via filament extrusion additive manufacturing

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