Effects of Sintering Conditions on the Properties of Al2O3/Ti(C,N) Ceramics

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This paper presents a study on the densification and mechanical properties of Al2O3/Ti(C,N) ceramics processed using a pressureless sintering technique. The Al2O3/Ti(C,N) ceramics containing 10, 20, 30 and 40 wt% Ti(C,N) were sintered in the temperatures ranging from 1500 to 1750 °C and in the atmospheres of vacuum, Ar, H2 and N2. It is found that both optimum sintering temperature and Ti(C,N) content exist, where the best densification and mechanical properties are achieved. The Al2O3/Ti(C,N) properties will decrease when either sintering temperature or Ti(C,N) content moves away from their optimum value. The experimental results also demonstrate that among the four atmospheres, Ar gives best results. To improve further the properties of Al2O3/Ti(C,N) composites, Al2O3 and Al2O3/Ti(C,N) powders have used to cover the specimens during sintering, and experiments revealed that covering with Al2O3/Ti(C,N) powder can significantly improve the properties of Al2O3/Ti(C,N) ceramics. Furthermore, the effects of Ti(C,N) content and sintering conditions on densification and mechanical properties are explained in terms of their influences on Al2O3/Ti(C,N) microstructures.

Info:

Periodical:

Advanced Materials Research (Volumes 41-42)

Edited by:

Xiaozhi Hu, Brent Fillery, Tarek Qasim and Kai Duan

Pages:

241-246

DOI:

10.4028/www.scientific.net/AMR.41-42.241

Citation:

Z. M. Xiu et al., "Effects of Sintering Conditions on the Properties of Al2O3/Ti(C,N) Ceramics", Advanced Materials Research, Vols. 41-42, pp. 241-246, 2008

Online since:

April 2008

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Price:

$35.00

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