Enhancement of fiber-matrix adhesion by laser ablation-induced surface microcorrugation

被引：7

作者：

Bedoui, Fahmi ^{[1
]}

Murthy, N. Sanjeeva ^{[1
]}

Zimmermann, Frank M. ^{[2
,3
]}

机构：

[1] Rutgers State Univ, New Jersey Ctr Biomat, Piscataway, NJ 08854 USA

[2] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA

[3] Rutgers State Univ, Lab Surface Modificat, Piscataway, NJ 08854 USA

来源：

JOURNAL OF MATERIALS SCIENCE | 2008年 / 43卷 / 16期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1007/s10853-008-2805-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Micrometer-sized surface corrugations produced on Kevlar fiber surfaces by laser ablation were found to dramatically enhance the mechanical adhesion between the fibers and the epoxy matrix in a fiber-reinforced composite. Symmetric and asymmetric corrugation structures were produced by irradiating the fibers with high-fluence UV laser pulses at various incidence angles. The interfacial shear strength (IFSS) between the fibers and the matrix was measured using the microbond fiber-pullout method. Upon laser ablation treatment, the IFSS increased by 120% with symmetric corrugation profiles obtained with laser irradiation normal to the fiber axis, and 5-fold with asymmetric corrugation profiles obtained with the laser incidence angle at 45 degrees to the fiber axis. A similar enhancement was observed in pullout tests under wet conditions. A simple model based on an elementary analysis of the expected strain field in the presence of interface corrugation is found to provide a quantitative explanation of the observed strength enhancement factors.

引用

页码：5585 / 5590

页数：6

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