ISSN:
1662-8985
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
This paper presents a study on the densification and mechanical properties ofAl2O3/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 from1500 to 1750 °C and in the atmospheres of vacuum, Ar, H2 and N2. It is found that both optimumsintering temperature and Ti(C,N) content exist, where the best densification and mechanicalproperties are achieved. The Al2O3/Ti(C,N) properties will decrease when either sinteringtemperature or Ti(C,N) content moves away from their optimum value. The experimental results alsodemonstrate that among the four atmospheres, Ar gives best results. To improve further theproperties of Al2O3/Ti(C,N) composites, Al2O3 and Al2O3/Ti(C,N) powders have used to cover thespecimens during sintering, and experiments revealed that covering with Al2O3/Ti(C,N) powder cansignificantly 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 oftheir influences on Al2O3/Ti(C,N) microstructures
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.41-42.241.pdf
