Title: Investigation on the grinding temperature field of nano-ZrO₂ dental ceramics with a nanoparticle jet of MQL

Authors: Sheng Wang; Changhe Li; Dongzhou Jia; Yali Hou

Addresses: School of Mechanical Engineering, Qingdao Technological University, 266033, China ' School of Mechanical Engineering, Qingdao Technological University, 266033, China ' School of Mechanical Engineering, Qingdao Technological University, 266033, China ' School of Mechanical Engineering, Qingdao Technological University, 266033, China

Abstract: The heat-transfer model of a surface grinding temperature field with a nanoparticle jet flow of minimum quantity lubrication (MQL), as well as the proportionality coefficient model of the energy input workpiece, was established. Numerical simulation of the surface grinding temperature field of a nano-ZrO₂ dental ceramic workpiece material was conducted. With increased cut depth, the peak values of grinding temperature rocketed. With increased workpiece feed speed, grinding temperature on the finished surface decreased. With increased wheel peripheral speed, a high amount of heat energy accumulated on the surface because of the low heat-transfer coefficient of the ceramic material, and a large temperature gradient appeared in the temperature distribution layer. Under the same cooling and lubrication conditions, grinding temperature insignificantly changed along the direction of grinding width. Conversely, under different cooling conditions, the temperature variation was significant. MQL grinding conditions with additive nanoparticles significantly affected the weakening of temperature effect on the grinding zone.

Keywords: grinding temperature; nano-ZrO2 dental ceramics; nanoparticle jets; minimum quantity lubrication; MQL; zirconium dioxide; zirconia; nanoparticles; nanotechnology; heat transfer; numerical simulation; cooling; temperature variation; nanomaterials.

DOI: 10.1504/IJCMSSE.2014.063757

International Journal of Computational Materials Science and Surface Engineering, 2014 Vol.6 No.1, pp.13 - 28

Received: 06 Nov 2013
Accepted: 22 Mar 2014
Published online: 30 Jul 2014 *

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