Ahuir-Torres, JI, Chen, X, Mason, L, Gambron, P, Walker, DD, Yu, G, Li, H, Mishra, R, Akar, Y, Jackson, FF and Bingham, PA (2022) Study of the Normal Force and Velocity Influence on the Fused Silica Scratching Mechanisms with α-Alumina Grit at Atomic Scale via Reaxff Reactive Molecular Dynamic Simulations. In: Proceedings of the 24th International Symposium on Advances in Abrasive Technology . (The 24th International Symposium on Advances in Abrasive Technology (ISAAT), 9th-12th December 2022, Guangzhou, China).

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Abstract

The fused silica is an optical glass material employed in several industries, which is usually grinded and polished to obtained ultra-smooth surface. α-alumina is often employed to get this surface. The scratching testing is a powerful technique to assess the process conditions that provoke the process induced damages. Normal force applied on abrasives and sliding velocity are main parameters to be considered in the scratching testing. Although the scratching mechanical mechanisms of the fused silica have previously been studied in depth, its chemical mechanisms have poorly been analysed. In this paper, the Reaxff reactive molecular dynamic simulation is used to study these mechanical and chemical mechanisms in various scratching processes under different velocities and normal loads. The results showed dissimilar types of scratching (penetration, penetration with dragging and dragging) according to the velocity and normal force. The scratching depth was higher at larger normal force and slower velocity. The temperature and potential energy also were stable at low normal force and slow velocity. The chemical interaction between the grain and the optical glass material furthermore appears as the adhesion.

Item Type:	Conference or Workshop Item (Paper)
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Divisions:	Engineering
SWORD Depositor:	A Symplectic
Date Deposited:	07 Dec 2022 10:40
Last Modified:	30 Oct 2023 13:23
URI:	https://researchonline.ljmu.ac.uk/id/eprint/18337

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