|
| Abstract No.: |
|
Scheduled at:
|
Monday, June 02, 2008, Room 08 3:00 PM
Plasma Spraying and Plasma Transferred Arc 1
New trends and modified plasma processes for the application of ceramic-based coatings
|
|
| Title: |
Co-deposited ceramic/polymer coatings for tailored insulation
|
|
| Authors: |
Stefan Gulizia* / CSIRO Materials Science & Engineering, Australia
Dr Mahnaz Jahedi / CSIRO Materials Science & Engineering, Australia
|
|
| Abstract: |
ABSTRACT
The application of ceramic die coats on moulds is an essential part of Gravity and Low Pressure die casting. The main function of these coatings is to provide a thermal barrier to prevent premature solidification of the casting alloy during die filling, and protect the moulds from the effects of molten aluminium during casting. These coating are made of one or more ceramic materials mixed with a silicate-based binder. Although existing die coats have reasonable insulating properties they have poor wear resistance and their applications and performance are highly operator-dependent. A novel die coat has been developed for the light metal industry utilising Thermal Spraying of co-deposited MgZrO2 and polymer particles. This coating is thermally treated to reveal a fine network of porosity, which has been found to enhance the thermal properties of the coating and provide excellent wear resistance during casting. This paper describes the methods used to characterise this coating and results obtained from industrial trials are discussed.
|
|