Sol–gel coating treatment of SiC particles and properties of resulting nickel/SiC composites

Abstract

Nickel matrix composite layers reinforced with SiC particles have been widely used for the protection of friction parts, combustion engines and casting moulds, due to their high specific strength and excellent wear resistance. Both the nickel and the SiC particles also have excellent high temperature performance. Unfortunately, interfacial reactions between nickel and SiC occur at temperatures above 450°C, leading to deterioration of interfaces with a sharp decline in high temperature properties.

Keywords:

• Ni/SiC composite
• Composite electrodeposition
• α-Al₂O₃ coating
• Interfacial modification
• High temperature performance