Paper Information

Journal:   INTERNATIONAL JOURNAL OF INDUSTRIAL ENGINEERING AND PRODUCTION MANAGEMENT (IJIE) (INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE) (PERSIAN)   FALL 2007 , Volume 18 , Number 4 (SUPPLEMENT OF METALURGY AND MATERIALS ENGINERING); Page(s) 57 To 63.
 
Paper: 

BALLISTIC PERFORMANCE OF LAYERED AL-AL203 COMPOSITES

 
 
Author(s):  MIRHABIBI A.R.*, FOTOUHI S.H.
 
* DEPARTMENT OF MATERIAL SCIENCE AND METALLURGICAL ENGINEERING, IRAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
 
Abstract: 

Due to light weight and good mechanical properties, ceramics have been used for ant bullet armor shields. A layered ceramic armor composite consist of a ceramic plate and a soft backing material such as a thick metal plate. There are various methods for bonding of ceramic layer to metallic one (1). In this research plasma spraying method has used for bonding and forming of a ceramic layer to the metal support. Alumina layers with 0.1, 0.2 and 0.3mm thickness were coated on aluminum base plates. In order to study the effect of intermediate layer on impact behavior, from a bond coat of 80%Ni-20%Cr with 0.1mm thickness was used and then a 0.2mm alumina coat was sprayed by a plasma torch. The hardness of the coating was measured by the Vickers method.
The prepared layered composite plates were supported by Kevlar fiber and the whole assembled unit used as armor shield against 9mm caliber shot by a MP5 gun.
Depth of bullet penetration, amount of fractured ceramic coating after bullet impact and the residual ceramic coating left after impact were measured. Interfaces in samples with and without intermediate layer, and also phase analysis of the coatings were examined by SEM and XRD. The best coating thickness was 0.2mm with a good performance in stopping the bullet and creating less damage to the ceramic layer.

 
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