The effect of water vapor on the agglomeration of wear particles of ceramics
The effect of water vapor on the agglomeration of wear particles of ceramics
复制标题
水蒸气对陶瓷磨损颗粒团聚的影响
DOI：
10.1016/s0043-1648(96)07274-2
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发表时间：
1997
期刊：
影响因子：
5
通讯作者：
K. Katô
中科院分区：
文献类型：
--
作者：
Junguo Xu;K. Katô
利用环境扫描电子显微镜（ESEM），开发了原位观察技术，观察氮化硅、碳化硅和氧化铝磨损颗粒的团聚过程，并研究水蒸气对磨损颗粒团聚的影响。结果表明，随着水蒸气压力的增加，磨损颗粒沉积物的尺寸变小。在这三种陶瓷中，氧化铝的磨损颗粒沉积物尺寸最大，氮化硅次之，碳化硅最小。此外，摩擦系数随着磨损颗粒的聚集而线性增加。沉积物归一化直径用于定量估计磨损颗粒的团聚程度，认为与以下参数有关：（1）粘附能——粘附能越高，磨损颗粒沉积物的直径越大； (2)电导率——电导率越低，摩擦带电越大，产生静电力，导致磨损颗粒沉积物的直径越大。
By means of environmental scanning electron microscopy (ESEM), an in situ observation technique was developed to observe the agglomeration process of wear particles of silicon nitride, silicon carbide and alumina and to study the effect of water vapor on the agglomeration of wear particles. The results show that the size of the deposit of wear particles becomes smaller with increasing water vapor pressure. Among the three ceramics, alumina shows the largest size of the deposit of wear particles, with silicon nitride next silicon carbide the smallest. Furthermore, friction coefficient increases linearly as wear particles agglomerate. The normalized diameter of the deposit, which is used to quantitatively estimate the agglomeration degree of wear particles, is considered to be related to following parameters: (1) adhesive energy— higher adhesive energy leads to a larger diameter of the deposit of wear particles; (2) electric conductivity—lower electric conductivity leads to larger triboelectrification which produces electrostatic force and results in a larger diameter of the deposit of wear particles.