NU 2014-096
Primary Investigator
Q. Jane Wang
Short Description
A lubrication technology that applies or replenishes a protective layer of carbon on metal parts within engines and drivetrains without requiring disassembly of the machinery.
Abstract
Northwestern researchers have developed a novel approach for in-situ and on-demand deposition of lubricious diamond-like-carbon (DLC) onto metal surfaces. This approach is based on the thermal decomposition of alcohols or carboxylic acids with strained hydrocarbon rings activated by frictional heating. Control of the threshold decomposition temperature can be tuned by adding spacer groups between the surface-active site and meta-stable hydrocarbon rings of the precursor. These oil additives provide a unique solution to boundary lubrication by providing DLC coatings to surfaces without the need to disassemble the engine or machine. Initial ball-on-disk (52100 bearing steel) tribometer data show average friction reduction of 5% with a significant reduction in friction spikes due to asperity contact (see figure below). Minimizing asperity contact has also shown to decrease wear coefficient of stainless steel by an order of magnitude. After the initial introduction and thermolysis of the DLC precursor, friction and wear reduction are maintained after multiple rounds of lubricant replacement with no additional additive needed.
Stage of Development
Proof of concept experiments have been completed. Technology is ready for industry-specific testing.
Applications
Advantages
IP Status
US and International patents have been filed for composition of matter and methods of use. PCT/US2015/056965