摘要
以异丙醇或异辛醇、五硫化二磷、稀土氯化物为原料 ,合成了四种油溶性二烷基二硫代磷酸稀土盐 .以红外光谱和化学分析确定了所合成稀土盐的结构和化学组成 .在四球实验机上研究了几种稀土盐抗磨添加剂在不同加入量的情况下的最大无卡咬负荷及在不同负荷下抗磨损能力 ,并与二烷基二硫代磷酸锌的性能进行了比较 .结果表明 :本研究制备的油溶性二异丙基二硫代磷酸镧LaDDP - 3、二异丙基二硫代磷酸钕Nd DDP - 3和二异辛基二硫代磷酸镧LaDDP - 8、二异辛基二硫代磷酸钕NdDDP - 8具有比二烷基二硫代磷酸锌(ZnDDP)好的抗磨性能和减摩性能 .EDXA分析表明在实验条件下 ,稀土元素摩擦扩渗进入了材料的表面 。
Four kinds of oil-soluble Lanthanum (Neodymium) Dialkyldithiophosphate, LaDDP-3, LaDDP-8, NdDDP-3, NdDDP-8, were synthesized from P 2S 5, isopropanol or isooctyl alcohol and lanthanum chlorid or neodymium chloride. The structure and element composition of these compounds were determined by Infrared Spectrography, EDTA titration and chemical analysis. Tribological behavior was evaluated and compared with that of commercial zinc dialkyldithiophophate. The value of p B and the wear spot diameter at different loading for the four kinds of compounds were evaluated and the results indicate that ReDDP synthesized for this study shows more excellent tribological characteristics than ZnDDP. Results of Energy dispersion analysis of X-ray (EDXA) indicate that La and Nd can diffuse into the wear spot surface under the tribological condition and a La or Nd-riched layer was found. This might be the main reason for the better extreme-pressure and antiwear properties of ReDDP.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2002年第3期324-328,332,共6页
Journal of Harbin Institute of Technology
基金
黑龙江省"八五"攻关资助项目 (G97L17-5 )
关键词
极压抗磨添加剂
二烷基二硫代磷酸稀土盐
边界润滑膜
抗磨性
制备
摩擦学
tribology of rear earth
extreme-pressure and antiwear additive
lanthanum neodymium dialkyldithiophosphate
boundary lubricating film
