1 Introduction</h5> The viscosity grade of automotive engine oils has been continuously reduced over the past three decades to improve fuel economy, that is, from SAE 15W40 during the early 1980s to 0W30 in recent years. This reduction in viscosity is made possible through advances in base oils and additive packages, particularly, anti-wear (AW) additives [1,2] . The material composition and microstructure of the contact area at the bearing interface are known to have decisive roles in tribological behavior. A lubricant AW additive is designed to decompose under thermomechanical stresses during the wear process, and the decomposition products subsequently react with wear debris or the contact area to form a protective tribofilm on bearing surfaces  . The performance of a tribofilm is determined by its composition, microstructure, and thickness. These properties are influenced by many factors, including the composition and mechanical properties of the contact materials, the rheological behavior of the lubricant, the chemistry of the AW additive, and the experimental conditions (e.g., load, temperature, and speed). Therefore, the characteristics of the tribofilm are important to understand friction and wear performances.</P>Zinc dialkyldithiophosphate (ZDDP) is the most common AW additive in automotive engine lubricants during the past half
Wear – Elsevier
Published: Nov 15, 2014
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera