Indentation responses of a graded zirconium phosphate-filled epoxy resin

Citation
Im. Low et al., Indentation responses of a graded zirconium phosphate-filled epoxy resin, J APPL POLY, 81(4), 2001, pp. 931-935
Citations number
22
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Organic Chemistry/Polymer Science","Material Science & Engineering
Journal title
JOURNAL OF APPLIED POLYMER SCIENCE
ISSN journal
0021-8995 → ACNP
Volume
81
Issue
4
Year of publication
2001
Pages
931 - 935
Database
ISI
SICI code
0021-8995(20010725)81:4<931:IROAGZ>2.0.ZU;2-0
Abstract
The effects of load and time on the Vickers indentation responses of a grad ed zirconium phosphate (ZP)-filled epoxy resin are described. The hardness of this material is dependent on the concentration of ZP dispersed within t he epoxy matrix. In the region poor in ZP, the hardness response is indepen dent of load. In contrast, the hardness response in the region rich in ZP i s profoundly load-dependent as a combined result of particle agglomeration and an indentation-size effect. When compared with the ZP-rich-epoxy, the Z P-poor epoxy exhibits a larger creep and a more pronounced elastic recovery in the Vickers impression. The nature and degree of deformation in the vic inity of Vickers contacts are also studied. During indentation the ZP-rich epoxy exhibits no contact-induced cracks but displays microscale plasticity , which can be associated with intergrain sliding, debonding, and grain pus h-out. (C) 2001 John Wiley & Sons, Inc.