| Autor: |
Liu, Er-Yong, Gao, Yi-Min, Wang, Wen-Zhen, Zhang, Xiao-Liang, Wang, Xiu, Yi, Ge-Wen, Jia, Jun-Hong |
| Předmět: |
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| Zdroj: |
Tribology Transactions; May/Jun2013, Vol. 56 Issue 3, p469-479, 11p |
| Abstrakt: |
A high-temperature self-lubricating Ni-based composite was prepared with the addition of Ag2MO2O7 by a powder met-allurgy technique. X-ray diffraction (XRD) analysis showed that Ag2Mo2O7 decomposed to Ag and MoO3 during the sin-tering process. The tribological properties of Nibased compos-ites were evaluated, and the effects of AgjMojOy incorporation on the friction and wear characteristics of composites were an-alyzed. The results showed that the tribological properties of Ni-based composite deteriorated with increasing temperature, and the addition of Ag2Mo2O7 decreased the coefficient of fric-tion and wear rate of Ni-based composite at medium and high temperatures. The coefficient of friction and wear rate of com-posite containing 20 wt% Ag2Mo2O7 were lowered to 0.33 and 1.51 x 10-5 mm³ N-1m-1 respectively. The wear mechanism was characterized by plastic deformation and delamination. In addition, the improvement of tribological properties of the Ni-based composite at high temperatures is attributed to syner-gistic lubricating effect of silver molybdate (reproduce in the rubbing process at high temperatures) and iron oxide (transfer from disk material to the pin). [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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