Laser blind holes of alumina and zinc oxide ceramics

Dissertant

Jabbar, Muhammad Abd al-Sattar

Thesis advisor

Shadhar, Sad Karim
Ibrahim, Adnan

University

University of Technology

Faculty

-

Department

Department of Production Engineering and Metallurgy

University Country

Iraq

Degree

Master

Degree Date

2013

English Abstract

In this study, blind holes have been drilled in two types of ceramic one is alumina and the other is zinc oxide using CO2 continuous wave laser.

In this work the effects of three laser parameters have been investigated: exposure time, focal position and power density.

The effect of these variables has been determined using images taken to the cross-section of the drilled ceramic samples; these images are taken by optical microscope.

The results show that the increasing of exposure time increases penetration depth, entrance diameter and taper angle.

Also for exposure time 50 sec resulting in similar penetration depth for both materials and at 41 sec gives the same taper angle for alumina and zinc oxide.

In another hand increasing of distance from focal position increases entrance diameter and taper angle but, decreases penetration depth.

Increasing of power density increases penetration depth and entrance diameter but, decreases taper angle.

The generation of resoildified material has great effect on the crater shape where increasing exposure time cause distortion due to condensing huge amount of resoildified material on the side walls of the crater.

Main Subjects

Engineering & Technology Sciences (Multidisciplinary)

Topics

• Oxides
• Aluminum oxide
• Zinc oxide

• APA
• MLA
• AMA

Language

English

Data Type

Arab Theses

Record ID

BIM-413028