Abstract
With an objective to develop lubricating materials for space applications with superior tribological characteristics, a hot press process was used to fabricate composite materials composed of MoS2, refractory metal oxides (MoO3, WO3, Ta2O5, and Nb2O5) and refractory metals (Nb, Mo, W and Ta). The composite materials were subjected to wear tests in a vacuum, N2 gas, and atmosphere. The best material composition under the sliding condition (face pressure at 0.5 MPa to 4 MPa and sliding velocity at 0.11 m/s to 0.55 m/s) was found to be MoS2 80% + MoO2 10% + Nb 10% (with a friction coefficient of 0.07 or lower and a specific friction amount of 10{sup -11} mm{sup 3}/mm{center_dot} N or less in a vacuum). Good tribological performance was also obtained with MoS2 80% + Nb2O5 10% + Nb 10% and MoS2 80% + MoO2 10% + Mo 10%. A feature common to the good composite materials is forming of uniform transfer film on surface of the opponent material. It was found that MoS2 decomposes producing Mo2S3 during hot-pressing the composite material. Greater wear in the atmosphere is because of production of MoO2 during friction. The effect of MoO2 addition is estimated to be in accelerating
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Citation Formats
Suzuki, M, and Nishimura, M.
Tribological characteristics of hot-pressed self-lubricating composites; Hot press ho de sakuseishita jiko junkatsusei fukugo zairyo no tribology tokusei ni kansuru kenkyu.
Japan: N. p.,
1992.
Web.
Suzuki, M, & Nishimura, M.
Tribological characteristics of hot-pressed self-lubricating composites; Hot press ho de sakuseishita jiko junkatsusei fukugo zairyo no tribology tokusei ni kansuru kenkyu.
Japan.
Suzuki, M, and Nishimura, M.
1992.
"Tribological characteristics of hot-pressed self-lubricating composites; Hot press ho de sakuseishita jiko junkatsusei fukugo zairyo no tribology tokusei ni kansuru kenkyu."
Japan.
@misc{etde_10156033,
title = {Tribological characteristics of hot-pressed self-lubricating composites; Hot press ho de sakuseishita jiko junkatsusei fukugo zairyo no tribology tokusei ni kansuru kenkyu}
author = {Suzuki, M, and Nishimura, M}
abstractNote = {With an objective to develop lubricating materials for space applications with superior tribological characteristics, a hot press process was used to fabricate composite materials composed of MoS2, refractory metal oxides (MoO3, WO3, Ta2O5, and Nb2O5) and refractory metals (Nb, Mo, W and Ta). The composite materials were subjected to wear tests in a vacuum, N2 gas, and atmosphere. The best material composition under the sliding condition (face pressure at 0.5 MPa to 4 MPa and sliding velocity at 0.11 m/s to 0.55 m/s) was found to be MoS2 80% + MoO2 10% + Nb 10% (with a friction coefficient of 0.07 or lower and a specific friction amount of 10{sup -11} mm{sup 3}/mm{center_dot} N or less in a vacuum). Good tribological performance was also obtained with MoS2 80% + Nb2O5 10% + Nb 10% and MoS2 80% + MoO2 10% + Mo 10%. A feature common to the good composite materials is forming of uniform transfer film on surface of the opponent material. It was found that MoS2 decomposes producing Mo2S3 during hot-pressing the composite material. Greater wear in the atmosphere is because of production of MoO2 during friction. The effect of MoO2 addition is estimated to be in accelerating the MoS2 decomposition. 34 refs., 59 figs., 7 tabs.}
place = {Japan}
year = {1992}
month = {May}
}
title = {Tribological characteristics of hot-pressed self-lubricating composites; Hot press ho de sakuseishita jiko junkatsusei fukugo zairyo no tribology tokusei ni kansuru kenkyu}
author = {Suzuki, M, and Nishimura, M}
abstractNote = {With an objective to develop lubricating materials for space applications with superior tribological characteristics, a hot press process was used to fabricate composite materials composed of MoS2, refractory metal oxides (MoO3, WO3, Ta2O5, and Nb2O5) and refractory metals (Nb, Mo, W and Ta). The composite materials were subjected to wear tests in a vacuum, N2 gas, and atmosphere. The best material composition under the sliding condition (face pressure at 0.5 MPa to 4 MPa and sliding velocity at 0.11 m/s to 0.55 m/s) was found to be MoS2 80% + MoO2 10% + Nb 10% (with a friction coefficient of 0.07 or lower and a specific friction amount of 10{sup -11} mm{sup 3}/mm{center_dot} N or less in a vacuum). Good tribological performance was also obtained with MoS2 80% + Nb2O5 10% + Nb 10% and MoS2 80% + MoO2 10% + Mo 10%. A feature common to the good composite materials is forming of uniform transfer film on surface of the opponent material. It was found that MoS2 decomposes producing Mo2S3 during hot-pressing the composite material. Greater wear in the atmosphere is because of production of MoO2 during friction. The effect of MoO2 addition is estimated to be in accelerating the MoS2 decomposition. 34 refs., 59 figs., 7 tabs.}
place = {Japan}
year = {1992}
month = {May}
}