摘要
作者合成了6种烷基链长不同的直链有机硼酸酯,并且利用Titaken试验机考察了它们用作润滑油添加剂的摩擦磨损性能;利用气相色谱仪(GC)对摩擦后的硼酸酯及摩擦产生的气体进行了分析;利用X-光电子能潜仪(XPS)和电子探针(EPMA)对摩擦表面进行了分析。Timken试验表明,硼酸酯有优良的减摩抗磨性能及较高的失效负荷,而且它们的分子链越长,减摩抗磨性能越好,失效负荷越高;GC分析表明,硼酸脂在摩擦过程中发生了碳链的降解并产生了小分子的气体;XPS和EPMA分析表明,硼以降解的硼酸酯的形式吸附于摩擦表面,而且硼酸脂的分子链越短,吸附于摩擦表面上降解的硼酸酯的分子也越短,但没有B_2O_3和FeB产生。
Six organic borates with different molecular chain length were synthesized and the friction and wear properties of these borates as oil additives were evaluated using a Timken Tester. Gas Chromatography (GO was adopted to investigate the decomposition of the borates, whereas EPMA and XPS were used to study the surface composition and valence state of boron on the rubbed surfaces.
It was found that the friction and wear properties of the borates are significantly influenced by the molecular chain length; the longer the chain length, the lower the friction coefficient and wear, and the higher the failure load. GC analyses found that organic borate take place decomposition and give out alkane and alkene during rubbing process.XPS analyses of the rubbed surfaces revealed that the binding energy of Bis increases after rubbing, but no pure B2O3 and FeB are generated. The failure load and the antiwear effect of the borates are related to the ratio of numbers of carbon atoms to numbers of boron atoms on the rubbing surfaces; the larger the ratio, the higher the failure load.
出处
《摩擦学学报》
EI
CAS
CSCD
北大核心
1992年第4期347-352,共6页
Tribology
关键词
润滑油
硼酸酯
摩擦
磨损
助剂
oil additive, organic borates, molecular chain length, friction and wear properties, antiwear mechanism
