Surface modification of a Ti2AlC soft ceramic by plasma nitriding treatment

Authors

Shibo Li, Beijing Jiaotong UniversityFollow
Shujun Hu, Beijing Jiaotong University
Ay Ching Hee, University of WollongongFollow
Yue Zhao, University of WollongongFollow

RIS ID

104127

Publication Details

Li, S., Hu, S., Hee, A. & Zhao, Y. (2015). Surface modification of a Ti₂AlC soft ceramic by plasma nitriding treatment. Surface and Coatings Technology, 281 164-168.

Abstract

Plasma nitriding treatment was used to improve the surface hardness of a Ti₂AlC soft ceramic due to its relatively low hardness of ~3GPa. A continuous coating was formed by plasma nitriding Ti₂AlC at 800°C for 4h in a mixture of 75vol.% N₂ and 25vol.% H₂ gas atmosphere. The surface layer is about 6μm in thickness and composed of TiN with a small amount of AlN. The hardness and the adhesion of the coating to the substrate were evaluated with Vickers hardness and scratch tests. The results showed that a strong coherent coating was formed and surface hardness was improved. The plasma nitriding treatment is a promising technique to improve the surface properties of Ti₂AlC at relatively low temperatures.