Surface Analyses of High-Temperature Oxidized In Situ Synthesized Ti-40Al-2.0C Composites

Abstract:

Article Preview

With the reaction between titanium (Ti) sponge, high purity aluminum (Al) and TiC/Al inter-alloy, non-consumable arc melting technique has been successfully used in situ synthesize Ti matrix composites of Ti-40Al-2.0C. The composites oxidized at 700~900°C for different time in static air. The influences of oxidation time and temperature to oxidation kinetics of composites were analyzed. The surface morphologies and components of the oxidation scales were examined by scanning electron microscope (SEM) with energy dispersive spectrometer (EDS). The results show that the isothermal oxidation kinetic curves of composites mainly follow parabolic rate law. When the composites oxidized at low temperature for short time, the color of oxidation surface is olivine which is similar to the color of the matrix and the oxides exist in non-uniform mixture state of Al2O3 and TiO2. While the composites oxidized at high temperature for long time, the color of oxidation surface is deep yellow and the oxides are mainly columnar hexagonal TiO2.

Info:

Periodical:

Advanced Materials Research (Volumes 194-196)

Edited by:

Jianmin Zeng, Taosen Li, Shaojian Ma, Zhengyi Jiang and Daoguo Yang

Pages:

1643-1646

DOI:

10.4028/www.scientific.net/AMR.194-196.1643

Citation:

H. G. Wang et al., "Surface Analyses of High-Temperature Oxidized In Situ Synthesized Ti-40Al-2.0C Composites", Advanced Materials Research, Vols. 194-196, pp. 1643-1646, 2011

Online since:

February 2011

Export:

Price:

$35.00

In order to see related information, you need to Login.

In order to see related information, you need to Login.