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On the mechanism of material removal by fixed abrasive lapping of various glass substrates

Title
On the mechanism of material removal by fixed abrasive lapping of various glass substrates
Author
박진구
Keywords
Double-sided lapping; Fixed abrasive pad; Brittle fracture; Hydration; Indentation
Issue Date
2013-04
Publisher
ELSEVIER SCIENCE SA
Citation
WEAR, April 2013, 302(1-2), P.1334-1339
Abstract
Glass ceramics are one of the important materials for optoelectronic devices. Fixed abrasive, double-sided lapping parameters (time, pressure, and platen speed) were optimized using borofloat, BK7 and quartz substrates. Lapping of borofloat, BK7 and quartz substrates were performed at optimized conditions. The removal rate was found to be highest in the case of borofloat, followed by quartz and BK7. The removal rate trend could not be explained based on the hardness of the material because quartz shows higher removal rate in spite of its higher hardness when compared to the BK7 substrate. The glass substrate forms a hydrated layer when it is exposed to an aqueous environment, and that depends on the composition of the substrate. The hardness of the material decreases significantly in the aqueous environment due to the formation of a hydration layer. The formation of a hydration layer is thought to facilitate faster and easier penetration of diamond abrasive into the substrate. Penetration then results in brittle fracture and the formation of lumps of debris. (C) 2012 Elsevier B.V. All rights reserved.
Description
Ministry of Education, Science and Technology
URI
http://www.sciencedirect.com/science/article/abs/pii/S0043164812003663http://hdl.handle.net/20.500.11754/44268
ISSN
0043-1648
DOI
10.1016/j.wear.2012.11.024
Appears in Collections:
GRADUATE SCHOOL[S](대학원) > BIONANOTECHNOLOGY(바이오나노학과) > Articles
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