Construction of phase diagram up to 2 GPa and 200°C for thermo-reversible gel lubricants by diamond anvil cell
✍ Scribed by Nobuyoshi Ohno; Sobahan Mia; Kenji Tateishi; Shigeki Morita; Yuji Shitara
- Publisher
- John Wiley and Sons
- Year
- 2009
- Tongue
- English
- Weight
- 317 KB
- Volume
- 21
- Category
- Article
- ISSN
- 0954-0075
- DOI
- 10.1002/ls.82
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✦ Synopsis
Abstract
The objective of this research was to make the phase diagram up to 2.0 GPa and 200°C of thermo‐reversible gel lubricants (TR Gel‐Lube) using diamond anvil cell (DAC). TR Gel‐Lube consisted of base fluid and gelling agent. The most important characteristic of TR Gel‐Lube is the reversible change of its physical state. The DAC is able to concerning visual observation of the sol/gel and liquid/viscoelastic–solid transition at high pressure and high temperature. DAC enables the visual observation of the photoelastic effect in order to generate local principal stress difference under the compression field for liquid/viscoelastic‐solid transition of base oil poly‐α‐olefin. The direct observation for sol/gel transition of TR Gel‐Lube at high pressure was also made possible. The phase diagram corresponding to transition from liquid to viscoelastic solid for base oil poly‐α‐olefin and sol to gel for TR Gel‐Lube was made by using DAC. Copyright © 2009 John Wiley & Sons, Ltd.