Tribochemical reactions on steel and other surfaces in new and aged oils

围绕二氧化碳排放的立法给发动机部件的高效运行带来了巨大压力。发动机的磨损和摩擦是通过在全配方油中添加润滑油添加剂来管理的。评估表面/润滑剂的相互作用及其减磨减摩能力的研究领域是摩擦化学，这项研究将考虑新系统和老化系统中润滑系统的摩擦学。目标是：使用原位技术(AFM和XANES)来评估分散剂、洗涤剂和摩擦改进剂配方的摩擦膜的形成。确定摩擦膜反应动力学作为接触条件的函数潜在的应用和益处本研究牢固地建立在摩擦学领域，该研究将有助于21世纪新一代发动机润滑剂策略的发展。将有关于添加剂之间的协同作用和拮抗作用的新知识。在博士结束时，学生将对涉及化学的摩擦学过程的实验和理论现象有一个平衡的知识。摩擦膜形成的动力学特征是在清洁和受污染的油中。

The legislation around CO2 emissions is putting great pressure on the efficient operation of engine components. The wear and friction in engines is managed by the addition of lubricant additives in the fully formulated oils. The field of study which assesses the surface/lubricant interactions and their abilities to reduce wear and friction is tribochemistry and this study will consider the tribology of lubricated systems in new and aged systems.ObjectivesThe objectives are to:Use in-situ technologies (AFM and XANES) to assess the formation of tribofilms from formulations of dispersants, detergents and friction modifiers.Determine the tribofilm reaction kinetics as a function of the contact conditionsPotential applications and benefitsThis study is firmly based in the field of tribology; the study will benefit the development of new generations of lubricant strategies for engines for the 21st century. There will be new knowledge in terms of the synergies and the antagonisms between additives.At the end of the PhD the student will have a balanced knowledge of experimental and theoretical phenomena of the tribology processes involving chemistry. The kinetics of tribofilm formation will be characterised in clean and contaminated oils.