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首页> 外文会议>American Society of Mechanical Engineers(ASME)/Society of Tribologists and Lubrication Engineers(STLE) International Joint Tribology Conference 2004(IJTC 2004) vol.1 pt.A; 20041024-27; Long Beach,CA(US) >FRICTION AND WEAR PROPERTIES OF CN_x/ SIC IN WATER LUBRICATION
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FRICTION AND WEAR PROPERTIES OF CN_x/ SIC IN WATER LUBRICATION

机译：水润滑中CN_x / SIC的摩擦磨损性能

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摘要

Amorphous carbon nitride coatings (a-CN_x) were deposited on SiC disk by ion beam assisted deposition (IBAD). The tribological behavior of aCN_x coating sliding against SiC ball in water was investigated and compared with that of SiC /SiC system at room temperature. The influences of testing conditions on friction coefficient and specific wear rate of both kinds of tribo-pairs were studied. The worn surfaces on disks were observed by scanning electron microscope (SEM). The results indicate that the running-in period of a-CN_x /SiC was shorter than that of SiC/SiC system in water. At a sliding velocity of 120mm/s, the mean steady state friction coefficients of SiC/SiC (0.096) was higher than that of a-CN_x /SiC (0.05), while at 160mm/s, lower friction coefficient (0.01) was obtained for SiC/SiC in water. With an increment of normal load, the mean steady-state friction coefficients after running-in first decreased, reaching a minimum value, and then increased. For self-mated SiC, the specific wear rate of SiC ball was a little higher than that of SiC disk, while for a-CN_x/SiC, the specific wear rate of SiC ball were 10 times smaller than that of a-CN_x coating. Furthermore, the specific wear rate of SiC ball sliding against a-CN_x coating was reduced by a factor up to 100～1000 in comparison to that against SiC in water. The wear mechanism of SiC/SiC system in water is related to micro-fracture of ceramic and instability of tribochemical reaction layer. Conversely, wear mechanism for a-CN_x/SiC is related to formation and transfer of easy-shear friction layer.
机译：通过离子束辅助沉积（IBAD）在SiC圆盘上沉积非晶氮化碳涂层（a-CN_x）。研究了aCN_x涂层在水中滑动时对SiC球的摩擦学行为，并将其与SiC / SiC系统在室温下的摩擦学行为进行了比较。研究了测试条件对两种摩擦副的摩擦系数和比磨损率的影响。通过扫描电子显微镜（SEM）观察盘上的磨损表面。结果表明，a-CN_x / SiC在水中的磨合期短于SiC / SiC系统的磨合期。在120mm / s的滑动速度下，SiC / SiC的平均稳态摩擦系数（0.096）高于a-CN_x / SiC（0.05）的平均稳态摩擦系数，而在160mm / s的情况下，较低的摩擦系数（0.01）用于水中的SiC / SiC。随着法向载荷的增加，磨合后的平均稳态摩擦系数首先减小，达到最小值，然后增加。对于自配SiC，SiC球的比磨损率略高于SiC盘，而对于a-CN_x / SiC，SiC球的比磨损率比a-CN_x涂层小10倍。此外，与水中的SiC相比，a-CN_x涂层上滑动的SiC球的比磨损率降低了100〜1000倍。 SiC / SiC体系在水中的磨损机理与陶瓷的微裂纹和摩擦化学反应层的不稳定性有关。相反，a-CN_x / SiC的磨损机理与易剪切摩擦层的形成和转移有关。

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